WO2017154324A1 - 波力発電装置 - Google Patents
波力発電装置 Download PDFInfo
- Publication number
- WO2017154324A1 WO2017154324A1 PCT/JP2017/000225 JP2017000225W WO2017154324A1 WO 2017154324 A1 WO2017154324 A1 WO 2017154324A1 JP 2017000225 W JP2017000225 W JP 2017000225W WO 2017154324 A1 WO2017154324 A1 WO 2017154324A1
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- WO
- WIPO (PCT)
- Prior art keywords
- hydraulic
- accumulator
- wave power
- hydraulic oil
- discharged
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
- F03B13/18—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore
- F03B13/1805—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem
- F03B13/1825—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for 360° rotation
- F03B13/184—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for 360° rotation of a water-wheel type wom
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/22—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the flow of water resulting from wave movements to drive a motor or turbine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
- F03B13/18—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore
- F03B13/1805—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem
- F03B13/1825—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for 360° rotation
- F03B13/183—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for 360° rotation of a turbine-like wom
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/40—Transmission of power
- F05B2260/406—Transmission of power through hydraulic systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
Definitions
- the present invention relates to a wave power generator.
- Patent Document 1 discloses a conventional wave power generation device.
- This wave power generator includes a floating body that is shaken by a wave, a large structure that is less or not shaken by the wave than the floating body, and a power conversion mechanism that converts relative displacement between the floating body and the large structure into a rotational motion.
- a ball screw shaft nut (nut) and a ball screw shaft, and a generator unit (unit) which is driven by the rotating ball screw shaft by a rotational force applied by a power conversion mechanism and generates electric power.
- This generator unit is driven by a ball screw shaft that rotates around a central axis, and discharges hydraulic oil, a hydraulic pump that discharges hydraulic oil, an accumulator that temporarily stores hydraulic oil discharged from the hydraulic pump, and hydraulic pressure It has a hydraulic motor into which hydraulic oil discharged from the pump and hydraulic oil temporarily stored in the accumulator flows, and a generator that is driven by the hydraulic motor to generate electric power.
- a floating body connected with a nut for a ball screw shaft receives waves and shakes up and down. Then, the ball screw shaft rotates around the central axis by the ball screw shaft nut that swings up and down together with the floating body. Then, the hydraulic screw is driven by rotating the ball screw shaft around the central axis, and hydraulic oil is discharged from the hydraulic pump. At this time, the pressure of the hydraulic oil between the hydraulic pump and the hydraulic motor temporarily increases. As a result, the hydraulic oil discharged from the hydraulic pump temporarily flows into the accumulator. In other words, the accumulator can temporarily store energy as pressure by the flow of hydraulic oil.
- the hydraulic motor is driven by the hydraulic oil discharged from the hydraulic pump and the hydraulic oil temporarily stored in the accumulator flowing into the hydraulic motor.
- this wave power generator can reliably send hydraulic oil from the hydraulic pump to the hydraulic motor, the generator can be driven well to generate electric power.
- the size of the floating body that fluctuates in the vertical direction changes as the wave size changes. That is, in this wave power generation device, the amount of unit time (hereinafter referred to as flow rate) at which hydraulic oil is discharged from the hydraulic pump changes as the floating body swings in the vertical direction. That is, in this wave power generator, the flow rate of the hydraulic oil flowing into the hydraulic motor changes. For this reason, this wave power generator may cause unevenness in the rotation speed of the hydraulic motor.
- the power generation efficiency of a generator changes as the number of revolutions per unit time changes. For example, when the number of revolutions per unit time decreases, the power generation efficiency decreases. For this reason, this wave power generator may cause unevenness in the power generated by the generator due to the change in the magnitude of the waves.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a wave power generation device that can generate electric power satisfactorily.
- the wave power generator of the present invention includes a water wheel, a hydraulic circuit, and a generator.
- the water wheel rotates in response to the waves.
- the hydraulic circuit has a hydraulic pump, a leveling circuit, a flow control valve, and a hydraulic motor.
- the hydraulic pump is driven by the rotation of the water wheel to discharge the working fluid.
- the leveling circuit includes an accumulator and a flow control valve.
- the accumulator stores the working fluid discharged from the hydraulic pump.
- the flow rate control valve receives the working fluid discharged from the hydraulic pump and the accumulator, and discharges the working fluid at a predetermined flow rate.
- the hydraulic motor is driven by the working fluid discharged from the flow control valve.
- the generator is driven by the rotation of the hydraulic motor to generate electricity.
- the wave power generation device of the present invention is an unload relief that discharges the working fluid stored in the accumulator toward the flow control valve when the pressure of the working fluid discharged from the hydraulic pump becomes a predetermined pressure or less.
- An (unloading relief) valve may be provided.
- the hydraulic motor when the working fluid is discharged from the accumulator, the hydraulic motor is driven, and when the working fluid flows into the accumulator and is stored, the hydraulic motor can stop driving. .
- the wave power generation device of the present invention includes a plurality of water turbines and a hydraulic circuit that supplies and discharges a working fluid for each of the turbines, and is connected to a hydraulic motor by joining the downstream side of each hydraulic circuit. obtain.
- the downstream flow path of the hydraulic pump may be branched and provided with a plurality of leveling circuits, and the downstream side of each leveling circuit may be joined to communicate with the hydraulic motor.
- the set pressure of the enclosed gas (gas) may be adjustable.
- FIG. It is the schematic which showed the wave power generator of Embodiment 1.
- FIG. It is the schematic which showed the wave power generator of Embodiment 2.
- FIG. It is the schematic which showed the wave power generator of Embodiment 3.
- (A) shows the change in the pressure of the working fluid discharged from the hydraulic pump and passed through the check valve
- (B) is a graph showing the change in the number of revolutions of the hydraulic motor per unit time.
- the wave power generation device of the first embodiment includes a plurality of water turbines 10, a hydraulic circuit 20 that is a hydraulic circuit, and a generator 11. These water turbines 10 can convert wave energy into kinetic energy. These water turbines 10 are installed on the shore of the sea, river or lake. These water turbines 10 have a rotating shaft portion and rotating blade portions formed around the rotating shaft portion (not shown). The rotating shaft portion is arranged extending in the vertical direction (not shown). The rotary blade is provided between a disk-shaped support that extends radially from the two rotary positions of the rotary shaft in the radial direction around the rotary shaft, and a support that is positioned above and below. It has a plurality of vertically long rectangular wings whose angles between each other extend in the radial direction (not shown). These water turbines 10 are rotated in one direction around the rotating shaft portion by receiving waves on the rotating blades.
- the hydraulic circuit 20 includes a storage unit 21, a plurality of hydraulic pumps 22 that are hydraulic pumps, a plurality of check valves 23, a relief valve 24, a leveling circuit 25, and a hydraulic motor 29 that is a hydraulic motor. is doing.
- the reservoir 21 stores hydraulic oil 21A that is a working fluid.
- each of these hydraulic pumps 22 is provided with a first inflow port 22A and a first discharge port 22B.
- Each hydraulic pump 22 has a first inflow port 22 ⁇ / b> A communicating with the storage portion 21.
- Hydraulic oil 21A flows from 22A.
- These hydraulic pumps 22 discharge the hydraulic oil 21A flowing in from the first inflow port 22A from the first discharge port 22B. That is, the hydraulic pump 22 is driven by the rotation of the water turbine 10 to discharge the hydraulic oil 21A.
- Each of the check valves 23 is provided with a second inflow port 23A and a second discharge port 23B.
- a second inflow port 23 ⁇ / b> A communicates with each of the first discharge ports 22 ⁇ / b> B of the plurality of hydraulic pumps 22.
- hydraulic oil 21A discharged from the respective first discharge ports 22B of the plurality of hydraulic pumps 22 flows from the respective second inflow ports 23A and flows out from the second discharge ports 23B.
- hydraulic oil 21A does not flow from the second discharge port 23B toward the second inflow port 23A. That is, these check valves 23 prevent the hydraulic oil 21A from flowing from the second discharge port 23B toward the second inflow port 23A.
- These check valves 23 communicate with each other at the second discharge ports 23B.
- the relief valve 24 is provided with a third inflow port 24A and a third discharge port 24B.
- the relief valve 24 is in communication with a second discharge port 23B in which a third inflow port 24A communicates with a plurality of check valves 23.
- the third discharge port 24 ⁇ / b> B communicates with the storage portion 21.
- the leveling circuit 25 includes an accumulator 26, an unload relief valve 30, and a flow control valve 28.
- the accumulator 26 is provided with an inflow / outlet port 26A.
- the accumulator 26 has an inflow / outflow port 26 ⁇ / b> A communicating with the second discharge port 23 ⁇ / b> B of the check valve 23 and the third inflow port 24 ⁇ / b> A of the relief valve 24.
- the accumulator 26 flows from the inflow / outlet port 26A into the accumulator 26 until the pressure of the hydraulic oil 21A discharged from the hydraulic pump 22 and passing through the check valve 23 increases to reach a predetermined pressure. That is, the accumulator 26 stores the hydraulic oil 21 ⁇ / b> A discharged from the hydraulic pump 22.
- the accumulator 26 can enclose nitrogen gas in a gas enclosing region 26B provided therein.
- the accumulator 26 can adjust the amount of nitrogen gas sealed in the gas sealing region 26B in accordance with the pressure of the hydraulic oil 21A in the hydraulic circuit 20 that communicates with the accumulator 26. That is, the accumulator 26 can adjust the set pressure of the enclosed nitrogen gas.
- the unload relief valve 30 is provided with a fourth inflow port 30A and a fourth discharge port 30B.
- the fourth inflow port 30A communicates with the second discharge port 23B of the check valve 23, the third inflow port 24A of the relief valve 24, and the inflow / outlet port 26A of the accumulator 26.
- the unload relief valve 30 is opened when the pressure of the hydraulic oil 21A discharged from the hydraulic pump 22 and passed through the check valve 23 becomes equal to or higher than a predetermined pressure, and the hydraulic oil is transferred from the fourth inflow port 30A to the fourth discharge port 30B. Flow 21A.
- the unload relief valve 30 is closed when the pressure of the hydraulic oil 21A discharged from the hydraulic pump 22 and passed through the check valve 23 becomes equal to or lower than a predetermined pressure, and flows from the fourth inflow port 30A to the fourth discharge port 30B. The flow of the hydraulic oil 21A is stopped.
- the internal structure and operation of the unload relief valve 30 will be described later.
- the flow control valve 28 is provided with a fifth inflow port 28A and a fifth discharge port 28B.
- the fifth inflow port 28 ⁇ / b> A communicates with the fourth discharge port 30 ⁇ / b> B of the unload relief valve 30.
- the flow rate control valve 28 receives the hydraulic oil 21A from the fifth inflow port 28A, adjusts the flow rate of the hydraulic oil 21A to a predetermined flow rate, and discharges it from the fifth discharge port 28B.
- the flow rate of the hydraulic oil 21A discharged from the fifth discharge port 28B does not change due to the change in the pressure of the hydraulic oil 21A filling the fifth inflow port 28A. That is, the flow control valve 28 is a pressure compensation type.
- the hydraulic motor 29 is provided with a sixth inflow port 29A and a sixth discharge port 29B.
- the hydraulic motor 29 is provided with an output shaft 29C.
- the sixth inflow port 29 ⁇ / b> A of the hydraulic motor 29 communicates with the fifth discharge port 28 ⁇ / b> B of the flow control valve 28.
- the hydraulic motor 29 has a sixth discharge port 29 ⁇ / b> B communicating with the storage unit 21.
- the hydraulic motor 29 is driven by the hydraulic oil 21A flowing from the sixth inflow port 29A, and the output shaft 29C rotates. That is, the hydraulic motor 29 is driven when the hydraulic oil 21A discharged from the flow control valve 28 flows in.
- the hydraulic oil 21A flowing in from the sixth inflow port 29A is discharged from the sixth discharge port 29B and returns to the storage unit 21.
- the hydraulic circuit 20 in which the hydraulic oil 21A circulates is constituted by the reservoir 21, the hydraulic motor 29, the check valve 23, the relief valve 24, the accumulator 26, the unload relief valve 30, the flow control valve 28, and the hydraulic motor 29. ing.
- the generator 11 is connected to the output shaft 29C of the hydraulic motor 29.
- the generator 11 is driven by the hydraulic oil 21 ⁇ / b> A and is driven by the rotational force of the output shaft 29 ⁇ / b> C of the hydraulic motor 29 that rotates to generate power. That is, the generator 11 is driven by the rotation of the hydraulic motor 29 to generate power.
- a plurality of water turbines 10 receive a wave at the rotating blade and rotate around the rotating shaft. And the rotational force of each water wheel 10 is transmitted to each hydraulic pump 22 via a rotating shaft part and the input shaft 22C, and the hydraulic pump 22 drives. Then, the hydraulic oil 21A stored in the storage part 21 flows into the hydraulic pump 22 from the first inflow port 22A of each hydraulic pump 22, and is discharged from the first discharge port 22B. Then, the hydraulic oil 21 ⁇ / b> A discharged from the hydraulic pump 22 and passing through the check valve 23 flows into the accumulator 26. At this time, the operating oil 21A continues to flow into the accumulator 26 until the pressure of the operating oil 21A discharged from the hydraulic pump 22 and passed through the check valve 23 increases and reaches a predetermined pressure. It is stored in.
- the rotating speed of the water turbine 10 is slowed down, so that the flow rate of the hydraulic oil 21A discharged from the hydraulic pump 22 and passing through the check valve 23 becomes small.
- the pressure of the hydraulic oil 21 ⁇ / b> A discharged from the hydraulic pump 22 and passing through the check valve 23 is difficult to increase.
- the hydraulic oil 21 ⁇ / b> A is reliably allowed to flow into the accumulator 26 by adjusting and reducing the set pressure of the nitrogen gas sealed in the accumulator 26.
- the hydraulic oil 21A starts to flow into the accumulator 26 from time T0. Then, the pressure of the hydraulic oil 21A discharged from the hydraulic pump 22 and passing through the check valve 23 increases, and reaches a predetermined pressure POUT at time T1. Then, the unload relief valve 30 opens. This is called a cutout.
- the time from time T0 to T1 is the time during which the accumulator 26 stores the hydraulic oil 21A.
- the value of POUT is 16 MPa.
- the hydraulic oil 21A is discharged from the fourth discharge port 30B of the unload relief valve 30, passes through the flow control valve 28, and flows into the hydraulic motor 29 from the sixth inflow port 29A of the hydraulic motor 29.
- the hydraulic oil 21 ⁇ / b> A stored in the accumulator 26 flows toward the flow control valve 28. That is, the unload relief valve 30 discharges the hydraulic oil 21A stored in the accumulator 26 toward the flow control valve 28 when the pressure of the hydraulic oil 21A discharged from the hydraulic pump 22 becomes equal to or lower than a predetermined pressure POUT. To do.
- the output shaft 29C of the hydraulic motor 29 is rotated by the hydraulic oil 21A flowing into the hydraulic motor 29.
- the rotational speed per unit time of the output shaft 29C at this time is R1 (see FIG. 5B).
- the unload relief valve 30 is cut out at time T1
- the hydraulic oil 21A stored in the accumulator 26 passes through the flow control valve 28 and flows into the hydraulic motor 29. Then, the pressure of the hydraulic oil 21A discharged from the hydraulic pump 22 and passing through the check valve 23 decreases, and reaches a predetermined pressure PIN at time T2. Then, the unload relief valve 30 is closed. This is called cut-in.
- the time from time T1 to T2 is the time during which the accumulator 26 is discharging the hydraulic oil 21A.
- the value of PIN is 12.8 MPa.
- the PIN value is 80% of the POUT value.
- the rotational speed of the water turbine 10 increases, so that the flow rate of the hydraulic oil 21A discharged from the hydraulic pump 22 and passing through the check valve 23 increases.
- the pressure of the hydraulic oil 21 ⁇ / b> A discharged from the hydraulic pump 22 and passing through the check valve 23 is less likely to decrease in the wave power generation device, so that it is difficult to reach PIN.
- the wave power generator is difficult to cut in when the unload relief valve 30 is cut out. That is, in this wave power generation device, when the rotor blade of the water turbine 10 receives a large wave, the time for the hydraulic oil 21 ⁇ / b> A to flow into the hydraulic motor 29 becomes long.
- the time required for the output shaft 29C of the hydraulic motor 29 to stop rotating becomes shorter and the time required for the wave power generator to rotate becomes longer. For this reason, in this wave power generation device, the generator 11 connected to the output shaft 29C is driven to generate longer time. Further, in this wave power generation device, when the rotor blade of the water turbine 10 receives a larger wave, the output shaft 29C of the hydraulic motor 29 continuously rotates. For this reason, this wave power generator generates power by continuously driving the generator 11 connected to the output shaft 29C.
- the unload relief valve 30 includes a first cylinder 31, a plunger 32, a first compression coil spring 33, and a second cylinder 34 in addition to the fourth inflow port 30 ⁇ / b> A and the fourth discharge port 30 ⁇ / b> B. , A spool 35, a second compression coil spring 36, a piston 37, a first communication path 30C, a second communication path 30D, and a third communication path 30E.
- the first cylinder 31 has a cylindrical shape and extends vertically. The upper end of the first cylinder 31 is closed by the first closing portion 31A.
- the first cylinder 31 is formed with an inclined portion 31B having an inner diameter that decreases in the downward direction at the lower end portion.
- one end of the fourth inflow port 30A communicates with the lower end of the inclined portion 31B.
- one end of the fourth discharge port 30B communicates with the upper side surface of the inclined portion 31B.
- the plunger 32 has a cylindrical shape and extends vertically.
- the plunger 32 is provided with a bottom 32A extending in a flat plate shape inward at the lower end.
- the bottom portion 32A is formed with a through-hole 32B provided so as to penetrate in a plate-like thickness direction.
- the plunger 32 has the same outer diameter as the inner diameter of the first cylinder 31.
- the plunger 32 has a vertical dimension smaller than the dimension from the first closing part 31A of the first cylinder 31 to the upper end of the inclined part 31B. The plunger 32 formed in this way is inserted into the first cylinder 31 with the bottom 32A facing down.
- the first compression coil spring 33 extends in the vertical direction.
- the first compression coil spring 33 has a lower end in contact with the upper surface of the bottom portion 32 ⁇ / b> A of the plunger 32 and an upper end in contact with the lower surface of the first closing portion 31 ⁇ / b> A of the first cylinder 31.
- the first compression coil spring 33 applies an elastic force to the plunger 32 in the downward direction.
- the outer peripheral edge of the lower end of the plunger 32 is in contact with the inside of the inclined portion 31 ⁇ / b> B of the first cylinder 31.
- the second cylinder 34 has a cylindrical shape and extends in the left-right direction. The left end of the second cylinder 34 is closed by a second closing portion 34A.
- the second cylinder 34 has a left inner diameter larger than a right inner diameter.
- the second cylinder 34 has a plurality of first grooves 34B extending in the right direction from the boundary between the left and right sides of the inner periphery.
- the second cylinder 34 is formed with a plurality of second grooves 34C extending from the right end on the right side of the inner periphery in the left direction.
- the spool 35 has a cylindrical shape and extends in the left-right direction.
- the spool 35 is closed at the right end by a third closing portion 35A.
- the spool 35 has a first protrusion 35B that protrudes rightward at the right end.
- the outer diameter of the spool 35 is the same as the inner diameter on the right side of the second cylinder 34.
- the spool 35 is formed with a first concave portion 35 ⁇ / b> C having an outer diameter that is recessed from the left and right central portion of the cylindrical outer periphery to the left end portion.
- the spool 35 is formed with a second recess 35D having an outer diameter recessed on the right side of the first recess 35C.
- the spool 35 penetrates in the radial direction on the left side of the third closing portion 35A to form a first communication hole 35E.
- the spool 35 penetrates in the radial direction on the left side of the first concave portion 35C to form a second communication hole 35F.
- the spool 35 thus formed is inserted on the right side of the second cylinder 34 with the third closing portion 35A facing the right side.
- the spool 35 is in contact with the first protrusion 35B and a second protrusion 38A formed to protrude leftward from the left end surface of the pressing member 38.
- the spool 35 is provided with the elastic force of the second compression coil spring 36 in the left direction via the pressing member 38.
- the spool 35 communicates with the left end portion of the first recess 35C overlapping the right end portion of the first groove 34B of the second cylinder 34 (see FIG. 4A).
- the spool 35 communicates with the first communication hole 35E overlapping the first groove 34B of the second cylinder 34 (see FIG. 4A).
- the piston 37 has a cylindrical shape and extends in the left-right direction.
- the piston 37 has the same outer diameter as the inner diameter on the left side of the second cylinder 34.
- the piston 37 has a third protruding portion 37 ⁇ / b> A that protrudes rightward at the right end.
- the piston 37 has a left-right dimension smaller than the left-right dimension on the left side of the second cylinder 34.
- the piston 37 thus formed is inserted on the left side of the second cylinder 34 with the third protruding portion 37A facing the right side.
- the piston 37 has the right end surface of the third protrusion 37 ⁇ / b> A in contact with the left end surface of the spool 35.
- the piston 37 has a left end surface that is spaced from the second closing portion 34 ⁇ / b> A of the second cylinder 34.
- the first communication passage 30C communicates with the fourth inflow port 30A having one end communicating with the lower end of the first cylinder 31.
- the other end of the first communication passage 30C is in communication with the outer periphery on the left side of the second cylinder 34 and immediately on the right side of the second closing portion 34A.
- One end of the second communication passage 30D communicates with the first closing portion 31A of the first cylinder 31.
- the other end of the second communication passage 30 ⁇ / b> D communicates with the left and right intermediate portion of the outer periphery on the right side of the second cylinder 34.
- the other end of the second communication passage 30 ⁇ / b> D communicates with the first recess 35 ⁇ / b> C of the spool 35.
- One end of the third communication passage 30E communicates with the fourth discharge port 30B.
- One end of the third communication passage 30 ⁇ / b> E is located in the vicinity of the first cylinder 31.
- the other end of the third communication passage 30 ⁇ / b> E communicates with the outer periphery of the right and left intermediate portion on the right side of the second cylinder 34.
- the other end of the third communication passage 30E communicates with the second recess 35D of the spool 35 (see FIG. 4A).
- the first cylinder 31, the second cylinder 34, the fourth inflow port 30A, the fourth discharge port 30B, the first communication path 30C, the second communication path 30D, and the third communication path 30E are hydraulic oil 21A. Is filled with.
- the pressure of the hydraulic oil 21A discharged from the hydraulic pump 22 and passing through the check valve 23 increases and does not reach the predetermined pressure POUT (see FIG. 5A)
- the outer peripheral edge of the lower end of the plunger 32 is the first cylinder. 31 is in contact with the inside of the inclined portion 31B. That is, the unload relief valve 30 is closed with the plunger 32 separating the fourth inflow port 30A and the fourth discharge port 30B.
- the spool 35 communicates with the left end portion of the first recess 35C overlapping the right end portion of the first groove 34B of the second cylinder 34 (see FIG. 4A). Further, the spool 35 communicates with the first communication hole 35E overlapping the first groove 34B of the second cylinder 34 (see FIG. 4A). At this time, the pressure of the hydraulic oil 21A filling the first cylinder 31, the second cylinder 34, the fourth inflow port 30A, the first communication path 30C, and the second communication path 30D is the same. At this time, the fourth discharge port 30B and the third communication passage 30E do not communicate with the first cylinder 31, the second cylinder 34, the fourth inflow port 30A, the first communication passage 30C, and the second communication passage 30D. .
- the pressure of the hydraulic oil 21A discharged from the hydraulic pump 22 and passing through the check valve 23 gradually increases. Then, the pressure of the hydraulic oil 21A filling the first cylinder 31, the second cylinder 34, the fourth inflow port 30A, the first communication path 30C, and the second communication path 30D gradually increases. At this time, the pressure of the hydraulic oil 21A filling the fourth discharge port 30B and the third communication passage 30E does not increase.
- the pressure of the hydraulic oil 21A discharged from the hydraulic pump 22 and passing through the check valve 23 increases, and reaches a predetermined pressure POUT (see FIG. 5A).
- the pressure of the hydraulic oil 21A that fills the first cylinder 31, the second cylinder 34, the fourth inflow port 30A, the first communication path 30C, and the second communication path 30D also increases and reaches a predetermined pressure POUT.
- the piston 37 is pushed rightward by the hydraulic oil 21 ⁇ / b> A filling the left side of the piston 37 of the second cylinder 34, and the piston 37 and the spool 35 move rightward in the second cylinder 34.
- the first recess 35C of the spool 35 also moves to the right, so that the left end of the first recess 35C does not overlap the right end of the first groove 34B of the second cylinder 34 (see FIG. 4B). . Further, the spool 35 communicates with the first communication hole 35E overlapping the second groove 34C of the second cylinder 34 (see FIG. 4B). The other end of the third communication passage 30E communicates with the first recess 35C of the spool 35 (see FIG. 4B). Then, the third communication path 30E communicates with the second communication path 30D through the first recess 35C of the spool 35 (see FIG. 4B). As a result, the pressure on the upper side of the bottom portion 32A of the plunger 32 of the first cylinder 31, the second communication passage 30D, and the right side of the piston 37 of the second cylinder 34 decreases.
- the first cylinder 31 is partitioned into an upper side and a lower side by a bottom 32A of a plunger 32 provided with a through hole 32B. That is, in the first cylinder 31, the upper side and the lower side of the bottom portion 32A of the plunger 32 communicate with each other through the through hole 32B. For this reason, the pressure of the hydraulic oil 21A filling the lower side 32A of the plunger 32 of the first cylinder 31 does not drop rapidly. As a result, the plunger 32 is pushed upward by the hydraulic oil 21A filling the lower side of the bottom 32A and moves upward in the first cylinder 31. Thus, the unload relief valve 30 communicates with the fourth inflow port 30A and the fourth discharge port 30B, and the hydraulic oil 21A flows from the fourth inflow port 30A to the fourth discharge port 30B. That is, the unload relief valve 30 is opened.
- the spool 35 is pushed leftward from the second compression coil spring 36 via the pressing member 38, and the piston 37 and the spool 35 move leftward within the second cylinder 34 (see FIG. 4A). ). Then, since the first recess 35C of the spool 35 also moves leftward, the left end of the first recess 35C again overlaps and communicates with the right end of the first groove 34B of the second cylinder 34 (see FIG. 4A). ). Further, the spool 35 does not overlap the second communication hole 35F with the second groove 34C of the second cylinder 34 (see FIG. 4A). Further, the other end of the third communication passage 30E communicates with the second recess 35D of the spool 35 again (see FIG. 4A).
- the pressure of the hydraulic oil 21A filling the upper side of the bottom 32A of the plunger 32 of the first cylinder 31, the second communication passage 30D, and the right side of the piston 37 of the second cylinder 34 is the left side of the piston 37 of the second cylinder 34.
- the pressure of the hydraulic oil 21A filling the first communication passage 30C and the fourth inflow port 30A is the same.
- the plunger 32 moves downward in the first cylinder 31.
- the outer peripheral edge of the lower end of the plunger 32 comes into contact with the inside of the inclined portion 31B of the first cylinder 31 again, and the fourth inflow port 30A and the fourth discharge port 30B are separated again (see FIG. 4A). ). That is, the unload relief valve 30 is closed again.
- the hydraulic oil 21 ⁇ / b> A discharged from the hydraulic pump 22 and passing through the check valve 23 flows again into the accumulator 26.
- the flow control valve 28 is provided between the accumulator 26 and the hydraulic motor 29. For this reason, this wave power generator can adjust the flow rate of the hydraulic oil 21A flowing into the hydraulic motor 29 to a predetermined flow rate. For this reason, this wave power generator flows into the hydraulic motor 29 even if the flow rate of the hydraulic oil 21A discharged from the hydraulic pump 22 changes due to the speed at which the water turbine 10 rotates depending on the magnitude of the waves. The flow rate of the hydraulic oil 21A can be suppressed to a predetermined flow rate.
- the wave power generation apparatus temporarily supplies the hydraulic oil 21A that cannot pass through the flow control valve 28 when the flow rate of the hydraulic oil 21A discharged from the hydraulic pump 22 is greater than or equal to the flow rate that can pass through the flow control valve 28. It can be stored in the accumulator 26. Further, in this wave power generation device, when the flow rate of the hydraulic oil 21A discharged from the hydraulic pump 22 is equal to or lower than the flow rate that can pass through the flow rate control valve 28, the hydraulic oil 21A stored in the accumulator 26 becomes the flow rate control valve. It can flow through the hydraulic motor 29 after passing through 28. Thereby, since this wave power generation device can level the rotation of the hydraulic motor 29, the generator 11 can be driven stably to generate electric power.
- the wave power generation device of the present invention can generate electric power satisfactorily.
- the wave power generator discharges the hydraulic oil 21A stored in the accumulator 26 toward the flow control valve 28 when the pressure of the hydraulic oil 21A discharged from the hydraulic pump 22 becomes a predetermined pressure or less.
- An unload relief valve 30 is provided.
- this wave power generation device stores hydraulic oil 21 ⁇ / b> A discharged from the hydraulic pump 22 in the accumulator 26 when the water turbine 10 rotates upon receiving a wave.
- the wave power generator opens the unload relief valve 30. .
- the wave power generation device can store in the accumulator 26 an amount of hydraulic oil 21A that can be rotated by the hydraulic motor 29 even when the water turbine 10 rotates in response to a small wave.
- the machine 11 can be driven to generate electricity.
- this wave power generator when the hydraulic oil 21A is discharged from the accumulator 26, the hydraulic motor 29 is driven, and when the hydraulic oil 21A flows into the accumulator 26 and is stored, the hydraulic motor 29 is driven. To stop. For this reason, this wave power generator can reliably drive each of the hydraulic motor 29 and the generator 11 at an efficient number of revolutions per unit time. For this reason, even if this wave power generation device receives a small wave and the water turbine 10 rotates, the power generation efficiency can be further improved and the power generation amount can be further increased.
- the accumulator 26 is capable of adjusting the set pressure of the enclosed gas.
- the wave power generation device can adjust the pressure at which the hydraulic oil 21 ⁇ / b> A stored in the accumulator 26 is discharged. That is, this wave power generator adjusts the set pressure of the nitrogen gas sealed in the accumulator 26 according to the magnitude of the wave at the place where it is installed.
- the hydraulic oil 21A flows in and out of the accumulator 26 even when the hydraulic oil 21A having a different flow rate is discharged. Can do.
- the wave power generation device of the second embodiment is different from the first embodiment in that the downstream side of the hydraulic circuit 120 joins and communicates with the hydraulic motor 29.
- Other configurations are the same as those of the first embodiment, the same configurations are denoted by the same reference numerals, and detailed description thereof is omitted.
- the upper ends of the rotating shafts of the plurality of water turbines 10 are connected to the input shafts 22C of the hydraulic pumps 22, respectively.
- a second inflow port 23 ⁇ / b> A of the check valve 23 communicates with each first discharge port 22 ⁇ / b> B of the hydraulic pump 22.
- the third inflow ports 24A communicate with the second discharge ports 23B of the plurality of check valves 23, respectively.
- the plurality of accumulators 26 communicate with the second discharge ports 23B of the plurality of check valves 23 and the third inflow ports 24A of the plurality of relief valves 24, respectively.
- each fourth inflow port 30A has a second discharge port 23B of the plurality of check valves 23, a third inflow port 24A of the plurality of relief valves 24, and an inflow / outlet port of the plurality of accumulators 26. It communicates with 26A.
- the plurality of flow control valves 28 are provided such that the respective fifth inflow ports 28A communicate with the fourth discharge ports 30B of the plurality of unload relief valves 30. Further, the flow rate control valves 28 communicate with each other at the fifth discharge port 28B. The flow rate control valve 28 communicates with the sixth inflow port 29 ⁇ / b> A of the hydraulic motor 29 at the fifth discharge port 28 ⁇ / b> B communicating with each other.
- the wave power generation apparatus includes a plurality of water turbines 10 and a hydraulic circuit 120 that supplies and discharges the working fluid to each of the water turbines 10, and joins the downstream side of each hydraulic circuit 120 to communicate with the hydraulic motor 29. Has been.
- a plurality of water turbines 10 receive a wave at the rotating blade and rotate around the rotating shaft. Then, the rotational force of these water turbines 10 is transmitted to the hydraulic pumps 22 of the respective hydraulic circuits 120, and the respective hydraulic pumps 22 are driven. Then, the hydraulic oil 21 ⁇ / b> A stored in the storage unit 21 flows into the hydraulic pump 22 from the first inflow port 22 ⁇ / b> A of each hydraulic pump 22. Then, hydraulic oil 21 ⁇ / b> A discharged from each hydraulic pump 22 and passing through each check valve 23 flows into each accumulator 26.
- this wave power generation apparatus is also provided with the flow control valve 28 between the accumulator 26 and the hydraulic motor 29. For this reason, this wave power generator can adjust the flow rate of the hydraulic oil 21A flowing into the hydraulic motor 29 to a predetermined flow rate. For this reason, this wave power generator flows into the hydraulic motor 29 even if the flow rate of the hydraulic oil 21A discharged from the hydraulic pump 22 changes due to the speed at which the water turbine 10 rotates depending on the magnitude of the waves. The flow rate of the hydraulic oil 21A can be suppressed to a predetermined flow rate.
- the wave power generation apparatus temporarily supplies the hydraulic oil 21A that cannot pass through the flow control valve 28 when the flow rate of the hydraulic oil 21A discharged from the hydraulic pump 22 is greater than or equal to the flow rate that can pass through the flow control valve 28. It can be stored in the accumulator 26. Further, in this wave power generation device, when the flow rate of the hydraulic oil 21A discharged from the hydraulic pump 22 is equal to or lower than the flow rate that can pass through the flow rate control valve 28, the hydraulic oil 21A stored in the accumulator 26 becomes the flow rate control valve. It can flow through the hydraulic motor 29 after passing through 28. Thereby, since this wave power generation device can level the rotation of the hydraulic motor 29, the generator 11 can be driven stably to generate electric power.
- the wave power generation device of the present invention can generate electric power satisfactorily.
- the wave power generator discharges the hydraulic oil 21A stored in the accumulator 26 toward the flow control valve 28 when the pressure of the hydraulic oil 21A discharged from the hydraulic pump 22 becomes a predetermined pressure or less.
- An unload relief valve 30 is provided.
- this wave power generation device stores hydraulic oil 21 ⁇ / b> A discharged from the hydraulic pump 22 in the accumulator 26 when the water turbine 10 rotates upon receiving a wave.
- the wave power generator opens the unload relief valve 30. .
- the wave power generation device can store in the accumulator 26 an amount of hydraulic oil 21A that can be rotated by the hydraulic motor 29 even when the water turbine 10 rotates in response to a small wave.
- the machine 11 can be driven to generate electricity.
- this wave power generation device when the hydraulic oil 21A is discharged from the accumulator 26, the hydraulic motor 29 is driven, and when the hydraulic oil 21A flows into the accumulator 26 and is stored, the hydraulic motor 29 is driven. To stop. For this reason, this wave power generator can reliably drive each of the hydraulic motor 29 and the generator 11 at an efficient number of revolutions per unit time. For this reason, even if this wave power generation device receives a small wave and the water turbine 10 rotates, the power generation efficiency can be further improved and the power generation amount can be further increased.
- the wave power generation apparatus also includes a plurality of water turbines 10 and a hydraulic circuit 120 through which hydraulic oil 21 ⁇ / b> A is supplied to and discharged from each of the water turbines 10. It is communicated to. For this reason, this wave power generation device can rotate each of the plurality of water turbines 10 in response to a wider range of waves. That is, in this wave power generation device, each of the water turbines 10 can receive waves of various sizes, and the drive of the generator 11 can be leveled compared to the case where there is one water turbine 10. For this reason, this wave power generation device can suppress unevenness in the power generated by the generator 11.
- the accumulator 26 can adjust the set pressure of the enclosed nitrogen gas.
- the wave power generation device can adjust the pressure at which the hydraulic oil 21 ⁇ / b> A stored in the accumulator 26 is discharged. That is, this wave power generator adjusts the set pressure of the nitrogen gas sealed in the accumulator 26 according to the magnitude of the wave at the place where it is installed.
- the hydraulic oil 21A flows in and out of the accumulator 26 even when the hydraulic oil 21A having a different flow rate is discharged. Can do.
- the wave power generation device of the third embodiment is provided with a leveling circuit 25 having an accumulator 26, an unload relief valve 30, and a flow control valve 28, and an inflow / outflow of each accumulator 26.
- the port 26A is different from the first and second embodiments in that the ports 26A communicate with each other.
- Other configurations are the same as those of the first or second embodiment, and the same configurations are denoted by the same reference numerals and detailed description thereof is omitted.
- the fourth inflow port 30A of the unload relief valve 30 communicates with each of the inflow / outlet ports 26A of the respective accumulators 26. Further, the fifth inflow port 28 ⁇ / b> A of the flow control valve 28 communicates with the fourth discharge port 30 ⁇ / b> B of each unload relief valve 30.
- each of these leveling circuits 25 is configured. Further, these leveling circuits 25 communicate the inflow / outflow ports 26A of the respective accumulators 26 with each other.
- the inflow / outflow ports 26 ⁇ / b> A of the respective accumulators 26 communicate with the second discharge port 23 ⁇ / b> B of the check valve 23 and the third inflow port 24 ⁇ / b> A of the relief valve 24.
- the fifth discharge ports 28B of the respective flow control valves 28 communicate with each other.
- the fifth discharge port 28 ⁇ / b> B of each flow control valve 28 that communicates with each other communicates with the sixth inflow port 29 ⁇ / b> A of the hydraulic motor 29.
- the hydraulic circuit 220 of the wave power generation apparatus includes a plurality of leveling circuits 25 provided by branching the flow path on the downstream side of the hydraulic pump 22, and the downstream side of each leveling circuit 25 is joined to form a hydraulic motor. 29 is communicated.
- the water wheel 10 receives a wave at the rotating blade and rotates around the rotating shaft. Then, the rotational force of the water turbine 10 is transmitted to the hydraulic pump 22 and the hydraulic pump 22 is driven. Then, the hydraulic oil 21 ⁇ / b> A stored in the storage unit 21 flows into the hydraulic pump 22 from the first inflow port 22 ⁇ / b> A of the hydraulic pump 22. Then, the hydraulic oil 21 ⁇ / b> A discharged from the hydraulic pump 22 and passing through the check valve 23 flows into each accumulator 26 of the plurality of leveling circuits 25.
- this wave power generation apparatus is also provided with the flow control valve 28 between the accumulator 26 and the hydraulic motor 29. For this reason, this wave power generator can adjust the flow rate of the hydraulic oil 21A flowing into the hydraulic motor 29 to a predetermined flow rate. For this reason, this wave power generator flows into the hydraulic motor 29 even if the flow rate of the hydraulic oil 21A discharged from the hydraulic pump 22 changes due to the speed at which the water turbine 10 rotates depending on the magnitude of the waves. The flow rate of the hydraulic oil 21A can be suppressed to a predetermined flow rate.
- the wave power generation apparatus temporarily supplies the hydraulic oil 21A that cannot pass through the flow control valve 28 when the flow rate of the hydraulic oil 21A discharged from the hydraulic pump 22 is greater than or equal to the flow rate that can pass through the flow control valve 28. It can be stored in the accumulator 26. Further, in this wave power generation device, when the flow rate of the hydraulic oil 21A discharged from the hydraulic pump 22 is equal to or lower than the flow rate that can pass through the flow rate control valve 28, the hydraulic oil 21A stored in the accumulator 26 becomes the flow rate control valve. It can flow through the hydraulic motor 29 after passing through 28. Thereby, since this wave power generation device can level the rotation of the hydraulic motor 29, the generator 11 can be driven stably to generate electric power.
- the wave power generation device of the present invention can generate electric power satisfactorily.
- the wave power generator discharges the hydraulic oil 21A stored in the accumulator 26 toward the flow control valve 28 when the pressure of the hydraulic oil 21A discharged from the hydraulic pump 22 becomes a predetermined pressure or less.
- An unload relief valve 30 is provided.
- this wave power generation device stores hydraulic oil 21 ⁇ / b> A discharged from the hydraulic pump 22 in the accumulator 26 when the water turbine 10 rotates upon receiving a wave.
- the wave power generator opens the unload relief valve 30. .
- the wave power generation device can store in the accumulator 26 an amount of hydraulic oil 21A that can be rotated by the hydraulic motor 29 even when the water turbine 10 rotates in response to a small wave.
- the machine 11 can be driven to generate electricity.
- this wave power generation device when the hydraulic oil 21A is discharged from the accumulator 26, the hydraulic motor 29 is driven, and when the hydraulic oil 21A flows into the accumulator 26 and is stored, the hydraulic motor 29 is driven. To stop. For this reason, this wave power generator can reliably drive each of the hydraulic motor 29 and the generator 11 at an efficient number of revolutions per unit time. For this reason, even if this wave power generation device receives a small wave and the water turbine 10 rotates, the power generation efficiency can be further improved and the power generation amount can be further increased.
- the hydraulic circuit 220 is provided with a plurality of leveling circuits 25 along with a flow path on the downstream side of the hydraulic pump 22, and is connected to the hydraulic motor 29 by joining the downstream sides of the leveling circuits 25. Yes.
- the hydraulic oil 21A discharged from the hydraulic pump 22 flows into the respective leveling circuits 25, so that the accumulators 26 provided in the respective leveling circuits 25 and the flow control valves are provided. 28 can be reduced in size.
- the wave power generation device can easily change the amount of hydraulic oil 21A discharged from the hydraulic pump 22 that can flow into the accumulator 26 by changing the number of leveling circuits 25 provided. .
- the accumulator 26 is capable of adjusting the set pressure of the enclosed gas.
- the wave power generation device can adjust the pressure at which the hydraulic oil 21 ⁇ / b> A stored in the accumulator 26 is discharged. That is, this wave power generator adjusts the set pressure of the nitrogen gas sealed in the accumulator 26 according to the magnitude of the wave at the place where it is installed.
- the hydraulic oil 21A flows in and out of the accumulator 26 even when the hydraulic oil 21A having a different flow rate is discharged. Can do.
- the present invention is not limited to the first to third embodiments described with reference to the above description and drawings.
- the following embodiments are also included in the technical scope of the present invention.
- the cut-in pressure is 12.8 Mpa. However, the present invention is not limited to this, and the cut-in pressure may be less than 12.8 Mpa or greater than 12.8 Mpa.
- a plurality of water turbines, a plurality of hydraulic motors, and a plurality of check valves 23 are used. It may be used.
- one turbine, one hydraulic motor, and one check valve are used. However, the present invention is not limited to this, and a plurality of turbines, hydraulic motors, and check valves may be used.
- the set pressure of the nitrogen gas sealed in the accumulator is adjusted. However, the present invention is not limited to this, and other methods such as a spring may be used.
- a leveling circuit is provided in the third embodiment, the present invention is not limited to this, and there may be one leveling circuit.
- the unload relief valve is used in the first to third embodiments, the present invention is not limited to this, and the unload relief valve may not be used. In this case, a solenoid valve or the like is used instead of the unload relief valve.
- the pressure of the hydraulic oil that has passed through the check valve is monitored with a pressure gauge. Thereby, when the pressure of the hydraulic oil that has passed through the check valve rises to a predetermined pressure, the electromagnetic valve can be opened. Further, when the pressure of the hydraulic oil that has passed through the check valve drops to a predetermined pressure, the solenoid valve is closed.
- nitrogen gas is sealed in the gas sealing region of the accumulator.
- the present invention is not limited to this, and other gases such as carbon dioxide and air may be sealed.
- other gases such as carbon dioxide and air may be sealed.
- two hydraulic circuits to which a water wheel is connected are provided.
- the present invention is not limited to this, and three or more hydraulic circuits to which a water wheel is connected may be provided.
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Abstract
Description
実施形態1の波力発電装置は、図1に示すように、複数の水車10、液圧回路である油圧回路20、及び発電機11を備えている。これら水車10は波のエネルギーを運動エネルギーに変換することができる。これら水車10は海、川又は湖の岸に設置される。これら水車10は回転軸部と、回転軸部の周りに形成した回転翼部とを有している(図示せず。)。回転軸部は垂直方向に延びて配置されている(図示せず。)。回転翼部は回転軸部の上下位置の2か所から回転軸部を中心に放射方向に拡がった円盤状の支持部と、上下に位置する支持部間に設けられ、上方からの平面視において互いの間のなす角度が均等に放射方向に延びた縦長矩形状の複数の翼部とを有している(図示せず。)。これら水車10は回転翼部に波を受けて回転軸部周りに一方向に回転する。
実施形態2の波力発電装置は、図2に示すように、油圧回路120の下流側が合流して油圧モータ29に連通している点が実施形態1と相違する。他の構成は実施形態1と同一であり、同一の構成は同一の符号を付し、詳細な説明を省略する。
実施形態3の波力発電装置は、図3に示すように、アキュムレータ26、アンロードリリーフ弁30、及び流量制御弁28を有した平準化回路25が併設されて、それぞれのアキュムレータ26の流入出ポート26A互いに連通している点が実施形態1及び2と相違する。他の構成は実施形態1又は2と同一であり、同一の構成は同一の符号を付し、詳細な説明を省略する。
本発明は上記記述及び図面によって説明した実施形態1乃至3に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)実施形態1乃至3では、作動油を用いているが、これに限らず、他の種類の液体や気体であっても良い。
(2)実施形態1では、カットアウトの圧力が16Mpaであるが、これに限らず、カットアウトの圧力が16Mpa未満でもよく、16Mpaより大きくても良い。
(3)実施形態1では、カットインの圧力が12.8Mpaであるが、これに限らず、カットインの圧力が12.8Mpa未満でもよく、12.8Mpaより大きくても良い。
(4)実施形態1では、複数の水車、複数の油圧モータ、及び複数の逆止弁23を用いているが、これに限らず、水車、油圧モータ、及び逆止弁23をそれぞれ1つずつ用いても良い。
(5)実施形態3では、水車、油圧モータ、及び逆止弁を1つずつ用いているが、これに限らず、水車、油圧モータ、及び逆止弁をそれぞれ複数用いても良い。
(6)実施形態1では、アキュムレータに封入した窒素ガスの設定圧力を調節しているが、これに限らず、ばね等の他の方法を用いても良い。
(7)実施形態3では、平準化回路が併設されているが、これに限らず、平準化回路が1つであっても良い。
(8)実施形態1乃至3では、アンロードリリーフ弁を用いているが、これに限らず、アンロードリリーフ弁を用いなくても良い。この場合、アンロードリリーフ弁に替えて電磁弁等を用いる。また、逆止弁を通過した作動油の圧力を圧力計で監視する。これにより、逆止弁を通過した作動油の圧力が所定の圧力まで上がると電磁弁を開弁させることができる。また、逆止弁を通過した作動油の圧力が所定の圧力まで下がると電磁弁を閉弁させる。
(9)実施形態1では、アキュムレータのガス封入領域に窒素ガスを封入しているが、これに限らず、二酸化炭素や大気等の他の気体を封入しても良い。
(10)実施形態2では、水車が連結された油圧回路を2つ併設しているが、これに限らず、水車が連結された油圧回路を3つ以上併設しても良い。
Claims (8)
- 波を受けて回転する水車と、
前記水車の回転によって駆動して、作動流体を吐出する液圧ポンプ、
前記液圧ポンプから吐出された前記作動流体を貯留するアキュムレータと前記液圧ポンプ及び前記アキュムレータから吐出された前記作動流体が流入し、前記作動流体の流量を所定の流量で吐出する流量制御弁とを有する平準化回路、及び前記流量制御弁から吐出された前記作動流体が流入することによって駆動する液圧モータを有する液圧回路と、
前記液圧モータの回転によって駆動して発電する発電機と、
を備えていることを特徴とする波力発電装置。 - 前記液圧ポンプから吐出された前記作動流体の圧力が所定の圧力以下になった際に、前記アキュムレータに貯留された前記作動流体を前記流量制御弁に向けて吐出するアンロードリリーフ弁を備えていることを特徴とする請求項1に記載の波力発電装置。
- 前記作動流体が前記アキュムレータから吐出されているとき、前記液圧モータが駆動し、前記作動流体が前記アキュムレータに流入して貯留しているとき、前記液圧モータが駆動を停止することを特徴とする請求項1に記載の波力発電装置。
- 複数の前記水車と、
これら水車毎に前記作動流体が給排される前記液圧回路と、
を併設し、各前記液圧回路の下流側を合流して前記液圧モータに連通されていることを特徴とする請求項1乃至3のいずれか一項に記載の波力発電装置。 - 前記液圧回路は、
前記液圧ポンプの下流側の流路が分岐して複数の前記平準化回路を併設し、各前記平準化回路の下流側を合流して前記液圧モータに連通されていることを特徴とする請求項1又は2に記載の波力発電装置。 - 前記アキュムレータは、
封入したガスの設定圧力が調節自在であることを特徴とする請求項1に記載の波力発電装置。 - 前記アキュムレータは、
封入したガスの設定圧力が調節自在であることを特徴とする請求項4に記載の波力発電装置。 - 前記アキュムレータは、
封入したガスの設定圧力が調節自在であることを特徴とする請求項5に記載の波力発電装置。
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| EP17762671.0A EP3428446A1 (en) | 2016-03-11 | 2017-01-06 | Wave power generation device |
| CN201780003211.2A CN108026893A (zh) | 2016-03-11 | 2017-01-06 | 波浪发电装置 |
| KR1020187007052A KR20180041163A (ko) | 2016-03-11 | 2017-01-06 | 파력 발전 장치 |
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| JP2016048010A JP2017160884A (ja) | 2016-03-11 | 2016-03-11 | 波力発電装置 |
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| PCT/JP2017/000225 Ceased WO2017154324A1 (ja) | 2016-03-11 | 2017-01-06 | 波力発電装置 |
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| EP (1) | EP3428446A1 (ja) |
| JP (1) | JP2017160884A (ja) |
| KR (1) | KR20180041163A (ja) |
| CN (1) | CN108026893A (ja) |
| WO (1) | WO2017154324A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019035344A1 (ja) * | 2017-08-14 | 2019-02-21 | Kyb株式会社 | 発電装置 |
| JP2024542808A (ja) * | 2021-12-03 | 2024-11-15 | パワーエイト テック インコーポレイテッド | 異種圧力媒体相互作動モジュールを使用するエネルギー貯蔵システム及び方法 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882361A (zh) * | 2018-07-04 | 2019-06-14 | 林志贺 | 一种群力流体发电装置及其储能装置 |
| CN110195677B (zh) * | 2019-05-21 | 2020-11-10 | 西安交通大学 | 一种并列分布式海流能液压传动发电机组及其控制方法 |
| CN110886676B (zh) * | 2019-12-09 | 2025-08-29 | 邝伟华 | 波浪整流滤波系统 |
| CN112879211B (zh) * | 2021-03-22 | 2021-11-19 | 西安交通大学 | 一种深海海流能水轮机液压发电自适应动态压力补偿系统 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2458691A1 (fr) * | 1979-06-11 | 1981-01-02 | Liautaud Jean | Dispositif destine a la creation de vagues deferlantes et a l'exploitation de leur energie |
| JP2012515870A (ja) * | 2009-01-20 | 2012-07-12 | アクアマリン パワー リミテッド | 電力捕捉システムおよび方法 |
| JP2013209978A (ja) * | 2012-02-29 | 2013-10-10 | Kyb Co Ltd | 波力発電装置 |
-
2016
- 2016-03-11 JP JP2016048010A patent/JP2017160884A/ja not_active Withdrawn
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2017
- 2017-01-06 CN CN201780003211.2A patent/CN108026893A/zh not_active Withdrawn
- 2017-01-06 WO PCT/JP2017/000225 patent/WO2017154324A1/ja not_active Ceased
- 2017-01-06 KR KR1020187007052A patent/KR20180041163A/ko not_active Withdrawn
- 2017-01-06 EP EP17762671.0A patent/EP3428446A1/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2458691A1 (fr) * | 1979-06-11 | 1981-01-02 | Liautaud Jean | Dispositif destine a la creation de vagues deferlantes et a l'exploitation de leur energie |
| JP2012515870A (ja) * | 2009-01-20 | 2012-07-12 | アクアマリン パワー リミテッド | 電力捕捉システムおよび方法 |
| JP2013209978A (ja) * | 2012-02-29 | 2013-10-10 | Kyb Co Ltd | 波力発電装置 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019035344A1 (ja) * | 2017-08-14 | 2019-02-21 | Kyb株式会社 | 発電装置 |
| JP2024542808A (ja) * | 2021-12-03 | 2024-11-15 | パワーエイト テック インコーポレイテッド | 異種圧力媒体相互作動モジュールを使用するエネルギー貯蔵システム及び方法 |
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| Publication number | Publication date |
|---|---|
| KR20180041163A (ko) | 2018-04-23 |
| EP3428446A1 (en) | 2019-01-16 |
| CN108026893A (zh) | 2018-05-11 |
| JP2017160884A (ja) | 2017-09-14 |
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