CN1150377C - Axial turbine power generation system - Google Patents

Abstract

An axial flow hydraulic turbine electric generator system includes a plurality of unit axial flow hydraulic turbines (102,103) arranged coaxial with each other in a flow passage along a direction of water flow, and having respective rotary impellers (104,106), and an electric generator (111) arranged parallel with the plurality of unit axial flow hydraulic turbines (102,103) in the direction of water flow, and driven by shaft outputs of the plurality of unit axial flow hydraulic turbines. This structure enables the use of mass-produced hydraulic turbines in axial flow hydraulic turbine electric generator systems with various specifications such as various heads, various flow rates, etc.

Description

Axial turbine power generation system

technical field

The present invention relates to an axial-flow water turbine power generation system, which combines an axial-flow water turbine with a fixed guide vane and a rotating impeller arranged coaxially with each other along the water flow direction.

Background technique

Typically, hydraulic systems have varying specifications, eg, may have different tips, flow rates, etc., which may depend on where they are installed. Therefore, the water turbines used are produced one by one according to different conditions of different installation locations.

However, it is unavoidable that the efficiency of designing and producing water turbines of different specifications according to different installation locations is very low, and the manufacturing workshop for producing turbines requires high costs, which is not feasible from an economic point of view. In order to improve its feasibility from an economic point of view, it can be considered to increase production efficiency through mass production of this type of water turbine. However, there are certain difficulties in efficiently mass-producing turbines of different specifications.

Contents of the invention

It is therefore an object of the present invention to provide an axial flow turbine power generation system which can use mass-produced turbines, that is, turbines produced with high efficiency, and which can be installed in various locations.

According to one aspect of the present invention, an axial flow turbine power generation system is provided, which includes: a plurality of unit axial flow turbines, these unit axial flow turbines are arranged coaxially with each other in a flow channel along the direction of water flow, and have corresponding a rotating impeller; and a generator, which is arranged in parallel with the plurality of unit axial-flow turbines along the water flow direction and is driven by the shaft output power of the plurality of unit axial-flow turbines.

In this system, the rotary impellers of several adjacent unit axial flow turbines can rotate in opposite directions.

The system also includes a gear mechanism, which is used to obtain a unidirectional shaft output power from the shaft output power of several adjacent unit axial flow turbines.

The system also includes a fixed guide vane provided on an outlet side of a flow channel in an axial flow turbine located most downstream.

In this system, the generator can be arranged outside the flow channel, and the shaft output power of the unit axial flow turbine can be transmitted to the generator by means of gears with intersecting axes.

According to another aspect of the present invention, there is provided an axial-flow turbine power generation system, which includes: a plurality of unit axial-flow turbines, which are arranged in a flow channel in parallel to each other along the direction perpendicular to the water flow, and have a corresponding rotating impeller; and a generator driven by the shaft output power of the plurality of unit axial turbines.

According to still another aspect of the present invention, an axial-flow turbine power generation system is provided, which includes: a plurality of axial-flow turbines, which are arranged in a flow channel in parallel to each other along the direction perpendicular to the water flow, and the plurality of axial flow Each of the hydraulic turbines includes a plurality of unit axial flow turbines, which are coaxially arranged and have corresponding rotating impellers; and a generator, which is composed of the plurality of unit axial flow turbines Shaft output power drive.

The system may further include at least one pulley transmission mechanism and a gear mechanism for transmitting the shaft output power of the plurality of unit axial flow turbines at a predetermined speed.

In the present invention, the rotary impellers of a plurality of unit axial flow turbines may have the same blade shape, and a blade connection angle may be set for each axial flow turbine.

According to still another aspect of the present invention, there is provided an axial-flow turbine power generation system, which includes: a plurality of unit axial-flow turbines, which are coaxially arranged in a flow channel along the direction of water flow, and have corresponding and a transmission device for combining the shaft output power of a plurality of unit axial flow turbines into at least one output power and transmitting at least one output power to a generator.

In this system, the transmission device may include a transmission unit provided on a circumferential portion of a rotary impeller of the unit axial flow turbine, and the transmission unit may be interlocked.

In this system, the transmission device may include: a driving wheel and a driven wheel, which are concentrically arranged on an outer ring of the rotating impeller of each unit axial flow turbine; an intermediate wheel, which has a first with the second transmission wheel, and disposed between a pair of adjacent unit axial flow turbines; and for interlocking the first transmission wheel with one of the adjacent unit axial flow turbines close to the first transmission wheel device, and also interlocks the second transmission wheel with another adjacent unit axial turbine.

In this system, the transmission device may include a concentric transmission wheel, which is arranged on an outer ring of the rotating impeller of each unit axial flow turbine, and the transmission wheels of each pair of adjacent unit axial flow turbines can pass through The straps or chains are interlocked.

In this system, the transmission device may include a transmission gear, which is concentrically arranged on an outer ring of the rotating impeller of each unit axial-flow turbine, and the gears of several adjacent unit axial-flow turbines may interact with each other. locking.

The system may also include a gear transmission for interlocking the shafts of each pair of adjacent unitary axial turbines.

According to still another aspect of the present invention, there is provided an axial-flow turbine power generation system, which includes: a plurality of unit axial-flow turbines, which are coaxially arranged in a flow channel along the direction of water flow, and have corresponding a rotating impeller; and a transmission device for combining the shaft output power of a plurality of unit axial flow turbines into at least one output power and transmitting at least one output power to a generator, and the system also includes A gear transmission device for interlocking the shafts of each pair of adjacent unit axial flow turbines, the gear transmission device may include first and second conical gears arranged on the shafts of each unit axial flow turbine, and include Transmission shaft, the transmission shaft is used to interlock the first bevel gear with the one close to the first bevel gear in several adjacent unit axial flow turbines, and to make the second bevel gear interlock with the adjacent several unit shafts Another interlock in flow turbines.

According to still another aspect of the present invention, there is provided an axial flow turbine power generation system, the system includes: a unit axial flow turbine, the turbine has a rotating impeller; and a generator, the generator is located outside the flow channel , and is driven by the shaft output power of the unit axial flow turbine; where the unit axial flow turbine is set so that its axis is parallel to the water flow direction, and the generator is set so that its axis is parallel to the axis of the unit axial flow turbine .

The system may also include one of a belt and a chain for transmitting the shaft output power of the unit axial turbine to the generator.

The system may further include: a first gear mechanism for converting the shaft output power of the unit axial flow turbine into shaft output power applied in a direction perpendicular to the shaft of the unit axial flow turbine; and a second A gear mechanism for reconverting the converted shaft output power into output power applied in a direction parallel to the shaft of the engine to deliver the resulting output power to the generator.

According to still another aspect of the present invention, there is provided an axial flow turbine power generation system, the system includes: a unit axial flow turbine, the turbine has a fixed guide vane and a rotating impeller; and a generator, the generator Located outside the flow channel and driven by the shaft output power of the unit axial flow turbine; wherein, the fixed guide vane forms a unit with an outer casing and an inner casing, and the fixed guide vane is connected to the inner casing and the outer casing, The unit and rotating impeller can be removed from the flow channel.

In this system, the component part constituting the unit axial flow turbine and the component part constituting the motor form a whole, thereby reinforcing the unit axial flow turbine and the engine.

Brief description of the drawings

1 is a cross-sectional view showing the structure of an axial flow turbine power generation system according to a first embodiment of the present invention;

FIG. 2 is an enlarged view showing a connection portion between the unit axial flow turbine and a generator in FIG. 1;

3 is a cross-sectional view showing the structure of an axial flow turbine power generation system according to a second embodiment of the present invention;

4 is a cross-sectional view showing the structure of an axial flow turbine power generation system according to a third embodiment of the present invention;

5 is a cross-sectional view showing the structure of an axial flow turbine power generation system according to a fourth embodiment of the present invention;

6 is a cross-sectional view showing the structure of an axial turbine power generation system according to a fifth embodiment of the present invention;

7 is a longitudinal sectional view showing the structure of an axial flow turbine power generation system according to a sixth embodiment of the present invention;

Figure 8 is a schematic diagram showing the device of Figure 7 seen from the downstream side of the flow;

Figure 9 is a modified version of the device shown in Figure 8;

10 is a longitudinal sectional view showing the structure of an axial turbine power generation system according to a seventh embodiment of the present invention;

Figure 11 is a schematic diagram showing the device of Figure 10 seen from the downstream side of the flow;

Figure 12 is a view showing a modified version of the device in Figure 11;

13 is a longitudinal sectional view showing the structure of an axial flow turbine power generation system according to an eighth embodiment of the present invention;

Figure 14 is a schematic diagram showing the device of Figure 13 seen from the downstream side of the flow;

Figure 15 is a view showing a modified version of the device in Figure 14;

16 is a longitudinal sectional view showing the structure of an axial flow turbine power generation system according to a ninth embodiment of the present invention;

Figure 17 is a view showing a modified version of the device in Figure 16;

18 is a longitudinal sectional view showing the structure of an axial flow turbine power generation system according to a tenth embodiment of the present invention;

Fig. 19 is a cross-sectional view showing part of the apparatus of Fig. 18, seen from downstream, in the vicinity of the belt and perpendicular to the axis of the generator;

20 is a cross-sectional view showing the structure of an axial turbine power generation system according to an eleventh embodiment of the present invention;

FIG. 21 is a cross-sectional view showing part of the apparatus of FIG. 20 seen from downstream, the portion being located near the power transmission shaft and perpendicular to the axis of the machine for generating electricity; and

Fig. 22 is an exploded view of an axial turbine power generation system according to a twelfth embodiment of the present invention.

Detailed ways

Next, embodiments of the present invention will be described in detail with reference to the drawings.

first embodiment

FIG. 1 is a sectional view showing the structure of an axial turbine power generation system according to a first embodiment of the present invention.

In FIG. 1, reference numeral 101 denotes a water turbine housing which contains first and second unit axial flow turbines 102 and 103 arranged coaxially. The first and second unit axial flow turbines 102 and 103 are supported by an upstream side fixed guide vane 105 provided upstream of the impeller 104 incorporated into the first unit axial flow turbine 102, and It is fixed on the inner surface of the turbine housing 101 . The water turbines 102 and 103 are also supported by a downstream side fixed guide vane 107 provided downstream of an impeller 106 incorporated into the second unit axial flow turbine 103 and fixed inside the turbine casing 101. surface. In addition, an intermediate fixed guide vane 108 is fixed on the casing 101 and placed between the impeller 104 of the first unit axial flow turbine 102 and the impeller 106 of the second unit axial flow turbine 103 .

A generator housing 109 is connected to the upstream end of the turbine housing 101 . A generator 111 is contained within the housing 109 and is supported by a generator bracket 110 . The generator 111 is arranged coaxially with the first and second unit axial flow turbines 102 and 103, and they are connected through a reverse gear 112 and an acceleration gear 113, which will be described below.

The second unit axial flow turbine 103 is arranged to rotate in the direction opposite to the first unit axial flow turbine 102, thereby absorbing the rotating part of the water flow at the outlet of the first unit axial flow turbine 102 on the upstream side, and can increase The efficiency of the turbine. The second unit axial turbine 103 itself has a rotating shaft 103 a inserted through the first unit axial turbine 102 .

FIG. 2 is an enlarged view showing a connection portion between the first and second unit axial flow turbines 102 and 103 and a generator 111. Referring to FIG.

As shown in FIG. 2 , a first central gear 114 is disposed on the rotating shaft 102 a of the first unit axial turbine 102 , and a gear 115 surrounding the circumference of the central gear 114 meshes with the first central gear 114 . On the other hand, a second central gear 116 is provided on the rotating shaft 103a of the second unit axial turbine 103, and an intermediate gear 117 around the circumference of the second central gear 116 meshes with the second central gear 116. In addition, a gear 118 that rotates with the gear 115 meshes with the intermediate gear 117 . A gear 119 that rotates with the intermediate gear 117 meshes with a gear 120 provided on the main shaft 111a.

Therefore, when the impellers 104 and 106 of the first and second unit axial flow turbines 102 and 103 rotate under the action of the water flow in the turbine housing 101, the torque of the impeller 106 and the torque generated by the first central gear 114, gear The torque of the counter-rotating impeller 104 is transmitted to the intermediate gear 117 . The torque of the gear 117 is transmitted to the generator main shaft 111a through the gears 119 and 120, thereby causing the generator to generate electricity.

Therefore, in this embodiment, a plurality of unit axial flow turbines each comprising a fixed guide vane and a rotating impeller are connected in a row, and the corresponding shaft output power is delivered to a single generator, thereby generating electrical power . This means that, even if the turbines are mass-produced on the basis of the same design, i.e. with high efficiency, various combinations of unit axial flow turbines can be used with different water pressures, different flow velocities, etc. Generator systems of different specifications. In this way, the cost-effectiveness of the system is improved. Also, in a generator system of several sizes that induces a rotating part at the outlet of the turbine on its upstream side, the efficiency of the turbine of the system can be determined by rotating the upstream side and The water turbine on the downstream side is raised so that the turbine on the downstream side can absorb the rotating part. In addition, providing a fixed guide vane at the outlet side of the flow passage of a unit turbine located most downstream can reduce vibration due to the rotating portion at the outlet of the turbine. In this way, the turbine will be quieter when it is working. In addition, the gear ratios of several gears constituting the reverse gear 112 are appropriately set such that an appropriate rotational speed relationship is determined between the first and second unit axial flow turbines 102 and 103 . In this embodiment, the gear mechanism can be replaced by an encapsulated connector unit.

In the embodiments to be described below, structural elements similar to those in the first embodiment are denoted by the same reference numerals, and no detailed description of these reference numerals will be given.

second embodiment

In the first embodiment, the generator casing 109 is arranged upstream of the axial flow turbine, and the generator 111 is located within the casing. This structure can be modified as shown in Figure 3, wherein an elbow 121 is connected upstream of the turbine casing 101, and the generator main shaft 111a of the generator 111 arranged outside the channel is inserted into the elbow 121, and is connected with the axial flow connected to the turbine.

Compared with the structure shown in FIG. 1, this structure does not limit the size of the generator, and can reduce the resistance of flowing water.

third embodiment

FIG. 4 is a sectional view showing the structure of an axial turbine power generation system according to a third embodiment of the present invention.

In this embodiment, the first and second unit axial turbines 122 and 123 are configured to rotate in the same direction. In this structure, the shaft output power of the first and second unit axial flow turbines 122 and 123 can be delivered as an optimum torque for driving the generator 111 . Unlike the first embodiment, the third embodiment is suitable for a case where there is no rotating part in the flow at the outlet of the unit axial turbine on the upstream side.

Fourth embodiment

Fig. 5 shows the structure of an axial turbine power generation system according to a fourth embodiment of the present invention. This power generation system is applicable to a case where the water pressure is larger than that in FIG. 1 .

In the axial flow turbine power generation system of FIG. 5 , two axial flow turbines shown in FIG. 1 are connected in a row along the axis of the flow channel through an intermediate shaft 125 to drive a single generator 111 .

fifth embodiment

Fig. 6 shows the structure of an axial flow turbine power generation system according to a fifth embodiment of the present invention. The generator is suitable for the situation of high flow rate.

In this embodiment, a plurality of axial flow turbines as shown in FIG. 1 are designed to correspond to predetermined water pressure and flow velocity, and these axial flow turbines are arranged in a single channel parallel to each other along the water flow direction. The shaft output power of these turbines is delivered to an intermediate shaft 127 via a gear 126 with intersecting shafts and also to the main shaft 111a of the generator 111 connected to the shaft 127 . Thus, the generator 111 is driven.

As mentioned above, the structure of Fig. 6 uses a plurality of axial-flow turbines as shown in Fig. 1 and arranges them parallel to each other. Alternatively, a plurality of axial flow turbines as shown in FIG. 5 may also be arranged in parallel with each other. This structure can be used in power generation equipment with high water pressure and high flow rate specifications.

In each of the above-mentioned embodiments, each impeller is designed to correspond to a predetermined water pressure and flow rate, and each blade is connected to the impeller at a predetermined angle. The hydraulic performance of each unit axial flow turbine can be finely adjusted by changing the connection angle of each blade, thereby changing their water level difference/flow rate specifications to suit any installation position.

Sixth embodiment

Fig. 7 is a longitudinal sectional view showing the structure of an axial turbine power generation system according to a sixth embodiment of the present invention. Fig. 8 is a view showing the device of Fig. 7 seen from the downstream side of the flow channel.

A water turbine casing 202 is placed across a pipeline 201 . The casing 202 includes first to third unit axial flow turbines 203A, 203B and 203C, which are arranged parallel to each other along the water flow direction.

The first to third unit axial turbines 203A, 203B and 203C have the same structure and size, and each includes an inlet conduit 204, an outlet conduit 205, and a rotating impeller 206 disposed between the two conduits. A plurality of fixed guide vanes 207 are provided on the inlet duct 204 for guiding the water flow into the rotating impeller 206 . The water flowing in the pipeline 201 is guided by each fixed guide vane 207 to rotate the impeller 206, thereby causing the impeller 206 to rotate.

A driving wheel 208 and a driven wheel 209 are concentrically disposed on the circumference of an outer ring 206a incorporated in the rotary impeller 206 of each of the axial turbines 203A, 203B, and 203C. In addition, the intermediate wheels 210 and 211 respectively have first transmission wheels 210a and 211a and second transmission wheels 210b and 211b, and the intermediate wheels are provided between the unit axial flow turbines 203A and 203B and the unit axial flow turbine 203B, respectively. Between and 203C.

The belt 212a is wound around the driving pulley 208 provided on the outer ring of the rotary impeller 206 of the first unit axial flow turbine 203A, and around the intermediate pulley 210 between the first and second unit axial flow turbines 203A and 203B. on the first transmission wheel 210a. The belt 212b is wound around the second transmission pulley 210b of the intermediate pulley 210, and around the driven pulley 209 of the second unit axial turbine 203B. Similarly, the belt 212c is wound around the drive pulley 208 of the second unit axial turbine 203B, and around the second transmission pulley 211a of the second intermediate pulley 211 . The belt 212d is wound on the second transmission wheel 211b of the second intermediate wheel 211, and on the driven wheel 209 of the third unit axial turbine 203c.

In addition, the belt 212e wound around the drive pulley 208 of the third unit axial turbine 203C is wound around the pulley 214 provided on the generator shaft 213 .

In this structure, the shaft output power of the first unit axial flow turbine 203A is transmitted to the driven wheel 209 of the second and third unit axial flow turbine 203B adjacent to the turbine 203A through the belts 212a and 212b, and is connected with the second unit axial flow turbine 203B. The shaft output power of the two-unit axial flow turbine 203B is combined. The combined shaft output power of the first and second unit axial flow turbines 203A and 204B is combined with the third unit axial flow turbine 203C through belts 212c and 212d. The shaft output power of the third unit axial flow turbine 203C is the sum of its own shaft output power and the output powers of the first and second unit axial flow turbines 203A and 203B, which is delivered to the generator shaft 213 , thereby driving a generator (not shown).

Therefore, the shaft output powers of adjacent unit axial flow turbines are sequentially and continuously combined with each other. In this way, the shaft output power of the plurality of unit axial flow turbines is combined into one output power for rotating the generator to generate electrical energy.

Although, in the above embodiment, there are three unit axial flow turbines arranged parallel to each other, as shown in FIG. 9 , more unit axial flow turbines may also be arranged adjacent to each other.

In the case of FIG. 9 , seven unit axial turbines 203A, 203B, . . . , 203G are arranged adjacent to each other, so that six unit axial turbines are arranged around the unit axial turbine 203A. The first and second unit axial turbines 203A and 203B are interlocked by belts 212a and 212b in a similar manner to FIG. 8, and the second and third unit axial turbines 203B and 203C are interlocked by belts 212c and 212d. Similarly, adjacent axial turbines are interlocked with each other. The shaft output power of the seventh unit axial flow turbine 203G is delivered to the generator shaft 213 through the pulley 214 .

In the sixth embodiment, the shaft output powers of a plurality of unit axial flow turbines are combined into one output power, which is delivered to a single generator. This can also be changed to combine the shaft output power of the unit axial flow turbine into several groups, and these several groups of shaft output power are delivered to several generators.

In the embodiments described below, structural elements similar to those in the sixth embodiment are marked with corresponding reference numerals, and no detailed description will be given.

Seventh embodiment

Fig. 10 and Fig. 11 show the structure of the axial flow turbine power generation system according to the seventh embodiment of the present invention, and these two figures correspond to Fig. 7 and Fig. 8 respectively.

In FIGS. 10 and 11, a transmission wheel 215 is provided on the circumference of an outer ring 206a of the rotary impeller 206 coupled to each of the axial turbines 203A, 203B, and 203C. In addition, as shown in FIG. 11, a pair of intermediate wheels 216 each having a transmission wheel 216a are provided between the unit axial flow turbines 203A and 203B and between the unit axial flow turbines 203B and 203C, and between the third unit axial flow turbines. between the flow turbine 203C and the pulley 214 .

A single belt 217 is wound on the transmission pulley 215 provided on the outer ring 206a of the rotary impeller 206 of each of the first to third unit axial flow turbines 203A, 203C and 203C, and also wound on the On the transmission wheel 214 that is arranged on the generator shaft 213 . That portion of the belt 217 between each pair of adjacent water turbines is urged towards each other by the drive wheels 216a of the corresponding pair of intermediate wheels 216 .

In this way, the shaft output power of the unit axial turbines 203A to 203C is delivered to the generator shaft 213 through a single belt 217 and pulley 214 . In other words, also in this case, the shaft output powers of several unit axial turbines are combined into one output power which is delivered to a single generator shaft.

FIG. 12 shows a modified form of the structure in FIG. 11 . In this modified form, seven unit axial flow turbines are arranged adjacent to each other. Figure 10 is similar to the situation shown in Figure 11, a single belt 217 is wound on the pulleys 215 arranged on the seven unit axial flow turbines, and also wound on the pulley 214 arranged on the generator shaft 213 . Therefore, the shaft output powers of the seven unit axial flow turbines 203A to 203G are combined into one output power through a single belt 217 to be delivered to the generator 213 . Thus, the structure shown in FIG. 12 has the same advantages as, for example, the structure in FIG. 10 .

Although, in each of the above-mentioned embodiments, a plurality of pulleys and a belt are used as transmission means, sprockets and pulleys may be used instead.

Eighth embodiment

Fig. 13 and Fig. 14 show the structure of an axial flow turbine power generation system according to the eighth embodiment of the present invention, and these two figures correspond to Fig. 7 and Fig. 8 respectively.

A gear 218 is provided on the circumference of an outer ring 206a of the rotary impeller 206 combined with each of the axial turbines 203A, 203B, and 203C. The gear 218 of the first unit axial flow turbine 203A meshes with the gear 218 of the second unit axial flow turbine 203B through a first intermediate gear 219a. Similarly, the gear 218 of the second unit axial flow turbine 203B meshes with the gear 218 of the third unit axial flow turbine 203C through a second intermediate gear 219b. In other words, the gears 218 of the adjacent unit axial flow turbines 203A and 203B, or the gears 218 of the adjacent unit axial flow turbines 203B and 203C are interlocked through the intermediate gear 219a or 219b. The gear 218 of the third unit axial turbine 203C meshes with a driven wheel 220 provided at the generator shaft 213 .

Also in this case, the shaft output powers of the unit axial turbines 203A to 203C are combined into one shaft output power, which is delivered to the generator shaft 213 through the driven gear 220 . Thus, this embodiment has the same advantages as those of the first embodiment described above.

FIG. 15 shows a modification of the structure in FIG. 14 . In this modified form, seven unit axial flow turbines 203A to 203G are arranged adjacent to each other. Also in this case, the gears 218 of adjacent unit axial flow turbines mesh with each other through intermediate gears 219a, 219b, . . . In this way, the shaft output power of the seven unit axial flow turbines is combined into one shaft output power, which is delivered to the generator shaft 213 .

Ninth embodiment

Fig. 16 shows the structure of an axial flow turbine power generation system according to the ninth embodiment of the present invention.

First and second bevel gears 222a and 222b are provided on the shaft 221 of each of the unit axial flow turbines 203A, 203B and 203C arranged in parallel to each other in the water flow direction. In addition, a transmission shaft 223a is provided between the first and second unit axial turbines 203A and 203B so that the shaft 223a is connected to these turbines. Similarly, a transmission shaft 223b is provided between the second and third unit axial flow turbines 203B and 203C so that the shaft 223b is connected to these turbines. The transmission shaft 223a has a conical gear 224a provided at one end of the shaft and meshed with a first conical gear 222a provided on the transmission shaft 221 of the first unit axial turbine 203A. The transmission shaft 223a also has a bevel gear 224b provided at one end of the shaft and meshed with the first bevel gear 222a provided on the transmission shaft 221 of the second unit axial turbine 203B.

A second bevel gear 222b provided on the shaft 221 of the second unit axial turbine 203B meshes with a bevel gear 225a provided on one end of the transmission shaft 223b. A bevel gear 225b provided on the other end of the transmission shaft 223b meshes with a second gear 222b provided on the shaft 221 of the third unit axial turbine 203C. In addition, the first bevel gear 222a provided on the shaft 221 of the third unit axial turbine 203C meshes with the bevel gear 226 provided on the generator shaft 213 .

In this structure, the shaft output power of the first unit axial flow turbine 203A is combined with the shaft output power of the second unit axial flow turbine 203B through bevel gears 222a and 224a, transmission shaft 223a, and bevel gears 224b and 222a. The combined shaft output power of the first and second unit axial flow turbines 203A and 204B passes through the bevel gear 222b of the second unit axial flow turbine 203B, the bevel gear 225a of the transmission shaft 223b, the transmission shaft 223b, and the conical gear of the shaft 223b The gear 225b and the bevel gear 222b meshing with the bevel gear 225b are combined with the shaft output power of the third unit axial turbine 203C. The combined shaft output power of the first to third axial turbines 203A to 203C is delivered to the generator shaft 213 through the bevel gear 222a of the third unit axial turbine 203C and the bevel gear 226 meshing therewith.

In this way, the shaft output powers of the adjacent unit axial flow turbines 203A to 203C are combined into one output power, which is used to drive the generator.

FIG. 17 shows a modification of the structure in FIG. 16 . In this modified form, seven unit axial flow turbines 203A to 203G are included in the generator. Also in this case, a bevel gear transmission mechanism similar to that of FIG. 16 is used to combine the shaft output powers of the seven unit axial flow turbines 203A to 203G. Therefore, this modified form has the same advantages as the above-described embodiment.

In the sixth to ninth embodiments, three or seven unit axial flow turbines are included in one generator. However, the number of unit axial turbines included in the generator is obviously not limited to three or seven. In addition, each unit axial flow turbine may include multiple driving wheels 208 and driven wheels 209 .

In the case where the generator is located outside the flow path of each axial turbine, the shaft output power of each axial turbine is determined by means of the rotating shaft of each turbine inserted through an elbow located either upstream or downstream of a corresponding impeller. Feeds to an electrical generator which is located outside the flow channel and has an axis of rotation coaxial with the axis of rotation of each turbine. In this case, each turbine shaft is inserted through a corresponding rotating impeller, and bearings are provided upstream and downstream of each rotating impeller and support a corresponding turbine shaft. The structure of each turbine and generator is different.

When an elbow is used to install a generator outside the flow passage, there must be a complicated pipe for converting the water flow bent by the elbow from the axial flow turbine into a straight water flow. This necessitates a large installation area for such complex piping. It is also unavoidable that the bending of the water flow will increase the loss of liquid energy. In addition, since the turbine shaft extends through each rotating impeller, when the rotating impeller is replaced, the bearing must be removed to push the turbine shaft out of each rotating impeller. When separating each rotary impeller from the inside of the flow channel, it is also necessary to remove the front and rear ducts of each axial flow turbine. In addition, since the elbow is placed between the turbine and the generator, the turbine and generator must be separated. In order to install these components, complicated work is required to adjust the positional relationship of their axes. Next, embodiments that solve these problems will be described.

Tenth embodiment

Fig. 18 is a longitudinal sectional view showing the structure of an axial turbine power generation system according to a tenth embodiment of the present invention.

Between an upstream conduit 324 and a downstream conduit 325 is provided: a first unit axial flow turbine 300A, the turbine includes an inlet turbine outer shell 301, an inlet fixed vane (fixed guide vane) 307, an inlet turbine Inner housing 332, a main turbine outer housing 302, turbine shaft 309, a rotating impeller 308, and an outlet fixed wing 310; a second unit axial turbine 300B comprising an inlet turbine outer housing 303, An inlet fixed vane (fixed guide vane) 313 , an inlet turbine inner housing 334 , a main turbine outer housing 304 , turbine shaft 315 , a rotating impeller 308 and an outlet fixed vane 316 . The first and second unit axial flow turbines 300A and 300B are arranged in a row along the water flow direction, and the turbine shafts 309 and 315 are connected, and an intermediate shaft 311 is disposed therein. The shaft output power of these unit axial flow turbines is combined into one shaft output power, which is delivered to the generator pulley 320 through the turbine pulley 317 arranged at the downstream end of the turbine shaft 315 and a belt (or chain) 322, thereby A generator 323 is driven, wherein the pulley 320 of the generator is connected to one end of a generator shaft 319 parallel to the turbine shafts 309 and 315 . At this time, the relative positional relationship between the turbine shaft 315 and the generator shaft 319 is maintained by a power transmission box 305 . When the axial flow turbine power generation system of the present invention is installed between the upstream conduit 324 and the downstream conduit 325, this structure allows the unit axial flow turbines 300A and 300B and the generator 323 to operate as a whole.

Fig. 19 is a cross-sectional view showing part of the arrangement of Fig. 18 seen from downstream, in the vicinity of the belt and perpendicular to the axis of the generator. A belt 322 through a belt insertion hole 321 to a generator pulley 320 located outside the flow channel delivers the shaft output power of the turbine shaft 317 located in the turbine outlet inner housing 336 within the flow channel. Thereby causing the generator to be driven.

In this embodiment, the generator can be mounted with its rotation axis parallel to the turbine shaft (not coaxially) without bending the conduit containing the axial turbine therein. This enables the installation of the axial flow turbine power generation system in a relatively small area. In addition, the straight flow path reduces the loss of liquid energy.

In addition, in this embodiment, the pulley arranged on the hydraulic pressure downstream of the rotary shaft of the rotary impeller of the downstream side water turbine is connected with the pulley arranged on the hydraulic pressure of the generator shaft through a belt or a chain, wherein the belt or The chain is inserted into a pipe located in a flow passage between the inner and outer casings of the downstream side water turbine. The shaft output power of the rotating impeller of the water turbine can be transmitted to the generator without making the flow passage between the inner and outer casings of the water turbine on the downstream side very narrow.

Eleventh embodiment

Fig. 20 is a cross-sectional view showing the structure of an axial turbine power generation system according to an eleventh embodiment of the present invention.

Between the upstream conduit 324 and the downstream conduit 325 is provided: a first unit axial turbine 300A, the turbine includes an inlet turbine outer casing 301, an inlet fixed wing 307, an inlet turbine inner casing 332, a main Turbine outer casing 302, turbine shaft 309, a rotating impeller 308, and an outlet fixed wing 310; and a second unit axial turbine 300B comprising an inlet turbine outer casing 303, an inlet fixed wing (fixed guide vanes) 313, an inlet turbine inner casing 334, a main turbine outer casing 304, a turbine shaft 315, a rotating impeller 308 and an outlet fixed wing 316. The first and second unit axial flow turbines 300A and 300B are arranged in a row along the water flow direction, the turbine shafts 309 and 315 are connected, and an intermediate shaft 311 is placed in between. The shaft output power of these unit axial flow turbines is combined into an output power, which is provided on the turbine shaft 315 through the turbine gear 328 having a rotating shaft perpendicular to the turbine shaft 315, an energy transmission shaft 329 and a generator gear 330. The turbine gear 327 at the downstream end of the turbine shaft 315 is hydraulically connected to a generator gear 331 of a generator shaft 319 parallel to the turbine shaft 315, thereby driving a generator 323.

Fig. 21 is a cross-sectional view showing part of the arrangement of Fig. 20 seen from downstream, the part being located in the vicinity of the power transmission shaft and perpendicular to the axis of the generator. The relative position relationship between the turbine shaft 315 and the generator shaft 319 is maintained by a power transmission box 326 . When the axial flow turbine power generation system of the present invention is installed between the upstream conduit 324 and the downstream conduit 325, this structure allows the unit axial flow turbines 300A and 300B and the generator 323 to operate as a whole.

In this embodiment, the generator can be mounted with its rotation axis parallel to the turbine shaft (not coaxially) without bending the conduit containing the axial turbine therein. This enables the installation of the axial flow turbine power generation system in a relatively small area. In addition, the straight flow path reduces the loss of liquid energy.

In addition, in this embodiment, the rotating shaft of the rotating impeller of the downstream side water turbine can be connected with the orthogonal gear transmission arranged on one end of the generator shaft through a gear shaft, wherein the gear shaft is perpendicular to the rotating shaft of the rotating impeller , and inserted into the pipe in the flow passage between the inner and outer casings of the axial flow turbine located on the downstream side. The shaft output power of the rotating impeller of the water turbine can be transmitted to the generator without making the flow passage between the inner and outer casings of the water turbine on the downstream side very narrow.

In addition, in the tenth and eleventh embodiments, the parts constituting the water turbine and the parts constituting the generator are integrally formed to reinforce the structure. In this way, when the unit axial flow turbine power generation system including the axial flow turbine and the generator is installed in the conduit, they can be handled as a whole. In this way, a precise positional relationship can be stably maintained between the turbine shaft and the generator shaft, for example, vibration of the shaft can be suppressed during operation of the system. In addition, since the distance between the turbine shaft and the generator shaft is kept short, the installation area required for the generator system including the axial flow turbine and the generator can be made smaller than when the generator and the generator are formed as separate components.

Twelfth embodiment

Fig. 22 shows the disassembled state of the axial flow turbine power generation system in Fig. 18 . As shown in Fig. 22, the system can be disassembled, for example, when the rotating impeller 308 or 314 has reached the end of its useful life and needs to be replaced with a new one, or to be displaced from the inside of the flow channel to its outside.

When the rotary impeller of the unit axial flow turbine 300A is taken out from the flow passage, before the impeller is taken out, the inlet turbine outer casing 301, the inlet turbine inner casing 332, the inlet fixed vane (fixed guide vane) 307, and an inlet turbine are formed. The unit of the mask 306 is divided into two parts in the circumferential direction. Subsequently, the unit is dismantled from the axial flow turbine power generation system to ensure the space for the rotating impeller 308 to pass through the flow channel. After the rotating impeller 308 is removed from the turbine shaft 309, the impeller can be removed from the flow passage.

When the rotary impeller 314 of the unit axial flow turbine 300B is taken out from the flow channel, before taking out the impeller, the unit constituting the inlet turbine outer case 303, the inlet turbine inner case 334, and the inlet fixed vane (fixed guide vane) 313 It is divided into two parts in the circumferential direction. Subsequently, the unit, the intermediate inner casing 312 and the intermediate shaft 311 are removed from the axial flow turbine power generation system to ensure the space for the rotating impeller 314 to pass through the flow channel. After the rotating impeller 314 is removed from the turbine shaft 315, the impeller can be removed from the flow passage.

In this embodiment, a single bearing supports the shaft of each axial flow turbine, the bearing being arranged upstream or downstream of the corresponding rotating impeller, and each inner housing without a bearing for supporting the turbine shaft is located at the rotating impeller. Upstream or downstream of the bearing, the bearing is integrally formed with a corresponding outer casing by corresponding fixed guide vanes. This structure makes it possible to radially disassemble the flow passage with the fixed guide vanes located downstream or upstream of each rotating impeller without dismantling the upstream or downstream portion of the flow passage near the fixed guide vanes, thereby ensuring , upstream or downstream of each rotating impeller, for taking each rotating impeller out of the space of the flow channel, each rotating impeller can be disassembled from the corresponding turbine shaft without dismantling the corresponding bearing, and without disassembling the corresponding The downstream and downstream conduits of the axial flow turbine then take the individual rotating impellers out of the flow channel.

industrial application

In summary, in the axial flow turbine power generation system of the present invention, a plurality of unit axial flow turbines of the same specification, such as unit axial flow turbines of the same flow rate and the same water pressure, are combined together to arrange Various specifications. In this way, mass-produced water turbines can be used in the system, whereby the system can be produced efficiently. This allows such systems to be installed where economic considerations currently prohibit them from being installed. In addition, the shaft output power of the unit axial flow turbines arranged in parallel to each other can be combined into one output power through a relatively simple mechanism. In addition, a straight flow channel can be set in the axial flow turbine power generation system, instead of using elbows. In this way, the flow path can be simplified, the installation area required by the system can be reduced, and the system will not lose liquid energy due to elbows. In addition, the individual rotary impellers incorporated in the system can be replaced without dismantling the upstream and downstream conduits.

Additional advantages and modifications can also be readily discovered by those skilled in the art. Therefore, the invention in its broadest sense is not limited to the representative embodiments and specific details shown and described herein. Accordingly, various changes may be made without departing from the spirit or scope of the invention as defined by the appended claims and their equivalents. For example, in various embodiments, each generator can instead be located on the side opposite to the corresponding unit axial flow turbine, symmetrically around a plane perpendicular to the direction of water flow.

Claims (10)

1. axial flow hydraulic turbine electric generator system is characterized in that it comprises:

A plurality of unit shaft flow water turbines (102,103), these unit shaft flow water turbines are provided with in a mobile passage mutually coaxially along the direction of current, and have corresponding rotary blade (104,106); And

One generator (111), this generator be arranged in parallel along water (flow) direction and a plurality of unit shaft flow water turbine (102,103), and is driven by the axle outputting power of a plurality of unit shaft flow water turbines,

Generator (111) is arranged on outside the flow channel, is transported on the generator (111) and the shaft power utilization of unit shaft flow water turbine (102,103) has the gear of concurrent aces (126).

2. axial flow hydraulic turbine electric generator system is characterized in that it comprises:

A plurality of unit shaft flow water turbines (203A is to 103C), they are arranged in the mobile passage mutually coaxially along the direction of current, and have corresponding rotary blade (206); And

Transmission device (208 to 210), this device is used to make the shaft power of a plurality of axial flow hydraulic turbines (203A is to 203C) to be combined at least one output power, and at least one output power is transferred on the generator, transmission device (208 to 210) comprises the gear unit (208 to 210) on the circumferential section of the rotary blade (206) that is arranged on unit shaft flow water turbine (203A is to 203C), and this all gear unit is interlocking.

3. system as claimed in claim 2 is characterized in that, transmission device (208 to 210) comprising:

One driving wheel (208) and a follower (209), they are arranged on the outer ring of rotary blade of each unit shaft flow water turbine (203A is to 203C) mutually concentrically;

One breast wheel (210,211), this breast wheel has first and second drive wheel, and is arranged between a pair of adjacent unit shaft flow water turbine (203A is to 203C); And

Be used for the device (212) with the interlocking of one of first drive wheel and adjacent unit shaft flow water turbine, this installs near first drive wheel, and also makes the axial flow hydraulic turbine interlocking adjacent with another of second drive wheel.

4. system as claimed in claim 2, it is characterized in that, transmission device (208 to 210) comprises concentric drive wheel (208,209), this drive wheel is arranged on the outer ring of rotary blade of each unit shaft flow water turbine (203A is to 203C), and the drive wheel of every pair of adjacent cells axial flow hydraulic turbine locks mutually by belt or chain.

5. system as claimed in claim 2, it is characterized in that, transmission device (208 to 210) comprises a driving gear (218), this driving gear is arranged on the outer ring of rotary blade of each unit shaft flow water turbine (203A is to 203C) concentrically, and the locking mutually of the gear (218) of plurality of adjacent unit shaft flow water turbine.

6. axial flow hydraulic turbine electric generator system, it comprises, a plurality of unit shaft flow water turbines (203A is to 103C), they are arranged on one mutually coaxially along the direction of current and flow in the passage, and have corresponding rotary blade (206); And

Transmission device (208 to 210), this device is used to make the shaft power of a plurality of axial flow hydraulic turbines (203A is to 203C) to be combined at least one output power, and at least one output power is transferred on the generator, and this system also comprises the mutual gear drive (222 to 226) that locks of axle that is used to make every pair of adjacent unit shaft flow water turbine, described gear drive (222 to 226) comprises first and second cone gear (222a on the axle that is arranged on each unit shaft flow water turbine, 222b), and comprise transmission shaft (223a, 223b), transmission shaft is used for making an approaching interlocking of first cone gear and adjacent plurality of units axial flow hydraulic turbine and first cone gear, and makes another interlocking in second cone gear and the adjacent plurality of units axial flow hydraulic turbine.

7. axial flow hydraulic turbine electric generator system is characterized in that it comprises:

One unit shaft flow water turbine (300A or 300B), this turbine have a rotary blade (308 or 314); And

One generator (323), this generator is positioned at outside the flow channel, and is driven by the shaft power of unit shaft flow water turbine (300A or 300B);

Wherein, the axle (309 or 315) that unit shaft flow water turbine (300A or 300B) is configured to wherein is parallel to water (flow) direction, and generator (323) is configured to the axle (309 or 315) that wherein axle (319) is parallel to the unit shaft flow water turbine.

8. system as claimed in claim 7 is characterized in that this system also comprises one of belt and chain, is used for the shaft power of unit shaft flow water turbine (300A or 300B) is transferred to generator (323).

9. system as claimed in claim 7 is characterized in that, this system also comprises:

One first gear mechanism (326,328), this mechanism is used for converting the shaft power of unit shaft flow water turbine (300A or 300B) to apply with the direction vertical with the axle of unit shaft flow water turbine shaft power; And

One second gear mechanism (330,331), this mechanism is used for converting the shaft power after the conversion to apply along the direction parallel with the axle (319) of motor (323) output power, is transported to generator with the output power that will obtain.

10. axial flow hydraulic turbine electric generator system is characterized in that it comprises:

One unit shaft flow water turbine (300A or 300B), this turbine have a stationary guide blades (307 or 303) and a rotary blade (308 or 314); And

One generator (323), this generator is positioned at outside the flow channel, and is driven by the shaft power of unit shaft flow water turbine (300A or 300B);

Wherein, stationary guide blades (307 or 313) constitutes a unit with an external casing (301 or 303) and an inner shell (332 or 334), stationary guide blades is connected in inner shell and external casing, this unit and rotary blade (308 or 314) can take out from flow channel, the member part that constitutes unit shaft flow water turbine (300A or 300B) divides formation an integral body with the component portion that constitutes motor, thus unit shaft flow water turbine and motor has been played reinforcement effect.

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