CN102864811A - Energy storage hydraulic system and excavator using same - Google Patents
Energy storage hydraulic system and excavator using same Download PDFInfo
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- CN102864811A CN102864811A CN2012104038066A CN201210403806A CN102864811A CN 102864811 A CN102864811 A CN 102864811A CN 2012104038066 A CN2012104038066 A CN 2012104038066A CN 201210403806 A CN201210403806 A CN 201210403806A CN 102864811 A CN102864811 A CN 102864811A
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- hydraulic
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- pressure sensor
- hydraulic pump
- accumulator
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- 238000004146 energy storage Methods 0.000 title abstract 7
- 239000010720 hydraulic oil Substances 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 239000012530 fluid Substances 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention provides an energy storage hydraulic system and an excavator using the same and belongs to the technical field of engineering machinery manufacture. The energy storage hydraulic system comprises a hydraulic oil path 1, a first pressure sensor 6, a first hydraulic pump/ motor 7, a second hydraulic pump/ motor 8, a second pressure sensor 9, an energy storage device 11 and a control circuit 4. The hydraulic oil path 1 is sequentially connected with the first pressure sensor 6, the first hydraulic pump/ motor 7, the second hydraulic pump/ motor 8, the second pressure sensor 9 and the energy storage device 11, and the control circuit 4 is respectively connected with the first pressure sensor 6, the first hydraulic pump/ motor 7, the second hydraulic pump/ motor 8 and the second pressure sensor. The energy storage hydraulic system and the excavator using the energy storage hydraulic system are controllable in pressure by means of the hydraulic pumps/ motors which are serially connected, fast and convenient to operate and high in efficiency.
Description
Technical field
The invention belongs to mechanical manufacturing field, relate to a kind of hydraulic system, relate in particular to a kind of stored energy hydraulic system and use the excavator of this system.
Background technology
Hydraulic system is a kind of take liquid as working media, is used for transferring energy to realize polytechnic mechanical system.It not only can be used for excellent suitability for press forming, also can be used for correcting, press-fit, packing, briquetting and pressing plate etc., so hydraulic system has a wide range of applications in industries such as automobile, Aeronautics and Astronautics and engineering machinery.When the oil pressure in the oil circuit in the hydraulic system is too high, not only can impacts damage to Hydraulic Elements, and cause the hydraulic pressure loss of energy.If this part energy can be reclaimed, can the saves valuable energy.The wherein a kind of of energy way of recycling is exactly to store the high pressure liquid force feed with accumulator, when reclaiming, uses the accumulator storage power; When needed, accumulator again can pressure release, replenishes working connection.
Property duty cycle is strong take the engineering machinery of hydraulic pressure as the transmission of power medium as a kind of for hydraulic crawler excavator, and swing arm descends, rotary braking is typical link of its work period.When Hydraulic Excavator's Boom descended, common hydraulic crawler excavator was the decrease speed of regulating swing arm by the aperture of control maintaining valve, realizes stopping of swing arm descending motion by maintaining valve.In the process that common Hydraulic Excavator's Boom descends, the large energy of release is most of to be consumed on maintaining valve, has caused the loss of energy.When the hydraulic crawler excavator rotary braking, the huge rotation energy of slewing equipment is lost in the overflow aperture position of overflow valve and anti-sway valve, so that hydraulic fluid temperature raises.The energy that loses in swing arm decline and the rotary braking process can be recovered in the accumulator, is used in the time of suitable, reaches energy-conservation purpose.
Before the present invention, the inventor finds prior art, and there are the following problems at least: in the process of rotary braking and swing arm decline, the pressure that needs to reclaim hydraulic oil changes.Therefore need to all be filled with in the accumulator by the hydraulic oil that pressure is different.The hydraulic fluid pressure that existing accumulator reclaims at needs is during greater than the hydraulic fluid pressure in the accumulator, hydraulic oil can be filled with in the accumulator, and it is opposite, the hydraulic fluid pressure that reclaims when needs is during less than the hydraulic fluid pressure in the accumulator, hydraulic oil cannot be filled with in the accumulator, cause organic efficiency not high, energy dissipation.
Therefore, those skilled in the art is devoted to develop a kind of hydraulic oil that can reclaim different pressures, improves the stored energy hydraulic system of organic efficiency and uses the excavator of this system.
Summary of the invention
A kind of stored energy hydraulic system and excavator now are provided, and hydraulic pump/motor and pressure sensor by series connection can be stored into the hydraulic oil of different pressures and be discharged into hydraulic circuit, improve and reclaim and release efficiency.Concrete technical scheme is as follows:
A kind of stored energy hydraulic system, comprise hydraulic circuit, energy folding and unfolding loop, accumulator loop and control loop, described energy folding and unfolding loop comprises the first pressure sensor, the first hydraulic pump/motor, described accumulator loop comprises the second hydraulic pump/motor, the second pressure sensor and accumulator, described hydraulic circuit successively with described the first pressure sensor, the first hydraulic pump/motor links to each other, described the first hydraulic pump/motor and described the second hydraulic pump/motor mechanical linkage, described the second hydraulic pump/motor successively with described the second pressure sensor, accumulator links to each other, described control loop respectively with described the first pressure sensor, the first hydraulic pump/motor, the second hydraulic pump/motor, the second pressure sensor links to each other.
Preferably, also comprise the first control valve, described hydraulic circuit links to each other with described the first pressure sensor by described the first control valve.
Preferably, also comprise the second control valve, described accumulator links to each other with the second pressure sensor by described the second control valve.
Preferably, described the first control valve and/or the second control valve are two position two-way valve.
Preferably, described the first control valve and/or the second control valve are electromagnetic valve, and described the first control valve and/or the second control valve link to each other with described control loop.
Preferably, described control loop is programmable logic controller.
A kind of excavator comprises above-mentioned stored energy hydraulic system.
Technique scheme has following advantage or beneficial effect:
The hydraulic oil of different pressures can be stored in the accumulator;
Can with the hydraulic oil in the accumulator with the earth pressure release that changes in hydraulic circuit;
Can control the speed of hydraulic oil delivered energy by the flow of control electromagnetic valve;
Overall structure is simple, convenient operation, has improved organic efficiency, has reduced waste.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of embodiments of the invention.
Wherein, 1 is that hydraulic circuit, 2 is that energy folding and unfolding loop, 3 is that accumulator loop, 4 is that control loop, 5 is that the first control valve, 6 is that the first pressure sensor, 7 is that the first hydraulic pump/motor, 8 is that the second hydraulic pump/motor, 9 is that the second pressure sensor, 10 is that the second control valve, 11 is accumulator.
The specific embodiment
Below with reference to accompanying drawing the present invention is done concrete explaination.
A kind of stored energy hydraulic system of embodiments of the invention as shown in fig. 1 comprises hydraulic circuit 1, energy folding and unfolding loop 2, accumulator loop 3 and control loop 4.Energy folding and unfolding loop 2 comprises the first control valve 5, the first pressure sensor 6, the first hydraulic pump/motor 7.Accumulator loop 3 comprises the second hydraulic pump/motor 8, the second pressure sensor 9, the second control valve 10 and accumulator 11.
Hydraulic circuit 1 links to each other with the first control valve 5, the first pressure sensor 6, the first hydraulic pump/motor 7 successively.The first hydraulic pump/motor 7 and 8 mechanical linkages of the second hydraulic pump/motor, the second hydraulic pump/motor 8 link to each other with the second pressure sensor 9, the second control valve 10, accumulator 11 successively.Control loop 4 links to each other with the first control valve 5, the first pressure sensor 6, the first hydraulic pump/motor 7, the second hydraulic pump/motor 8, the second pressure sensor 9, the second control valve 10 respectively.
The first control valve 5 and the second control valve 10 are the bi-bit bi-pass electromagnetic proportional valve, and the Signal Regulation that the aperture of valve port can be sent according to control loop 4 realizes flow-control.The first hydraulic pump/motor 7, the second hydraulic pump/motor 8 not only can be used as variable pump and have used but also can be used as variable displacement motor and use, singly the turning discharge capacity and can control by the size of control loop 4 control break swashplate angles of pump and motor.
Embodiments of the invention can be stored into the hydraulic oil of different pressures in the accumulator.Simultaneously, can with the hydraulic oil in the accumulator with the earth pressure release that changes in hydraulic circuit.Can also control the speed of hydraulic oil delivered energy by the flow of control ratio valve.
As shown in fig. 1, embodiments of the invention are in the stored energy process, and control loop 4 is controlled the flow Q of first hydraulic pump/motor 7 of flowing through by the opening of controlling the first electromagnetic valve 5
1
The first pressure sensor 6 Real-time Collections need the pressure p of the hydraulic oil of energy recovery
1, and passing to control loop 4, control loop 4 singly turns discharge capacity q by what the swashplate angle of controlling the first hydraulic pump/motor 7 was controlled the first hydraulic pump/motor 7
1The second pressure sensor 9 Real-time Collections the second hydraulic pump/motor 8 outlet hydraulic fluid pressure p
2, and pass to control loop 4, control loop 4 carry out computing determine the second hydraulic pump/motor 8 swash plate angle size so that the second hydraulic pump/motor 8 singly turn discharge capacity q
2=p
1* q
1/ p
2
In energy release process, the second pressure sensor 9 Real-time Collection accumulators 11 are through the pressure p in the second control valve 10 exits
2, and pass to control loop 4.Control loop 4 passes through p
2* q
2=p
1* q
1Formula, according to the force value p in the energy demand output loop of load
1Size changes the swashplate angle of the first hydraulic pump/motor 7 and the second hydraulic pump/motor 8, can realize energy folding and unfolding loop p
1Pressure.
In addition, the size of the opening by controlling the second control valve 10 can be controlled the flow Q of the hydraulic oil of accumulator 11 outputs
2, and the flow Q of energy output loop
1Zooming in or out of meeting equal proportion.
When pressure changes in the energy folding and unfolding loop of embodiments of the invention, the pressure size that control loop 4 detects according to the first pressure sensor 6 and the second pressure sensor 9 is adjusted the size of the swashplate angle of the first hydraulic pump/motor 7 and the second hydraulic pump/motor 8, the hydraulic energy of different pressures can be stored in the accumulator 11.And do not adopt the present embodiment, and pressure is lower than in the situation of pressure of accumulator 11 entrance in energy folding and unfolding loop, and the energy of hydraulic oil can not store in the accumulator 11.
In the accumulator energy release process of embodiments of the invention, the pressure in the energy Releasing loop and flow can change according to actual needs.And do not adopt the present embodiment, and accumulator 11 energy release process, pressure will be subject to the restriction of accumulator 11 self characters in the loop.
A kind of excavator comprises above-mentioned stored energy hydraulic system.
Above specific embodiments of the invention are described in detail, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and substituting also all among category of the present invention.Therefore, not breaking away from impartial conversion and the modification of doing under the spirit and scope of the present invention, all should contain within the scope of the invention.
Claims (7)
1. stored energy hydraulic system, it is characterized in that, comprise hydraulic circuit (1), energy folding and unfolding loop (2), accumulator loop (3) and control loop (4), described energy folding and unfolding loop (2) comprises the first pressure sensor (6), the first hydraulic pump/motor (7), described accumulator loop (3) comprises the second hydraulic pump/motor (8), the second pressure sensor (9) and accumulator (11), described hydraulic circuit (1) successively with described the first pressure sensor (6), the first hydraulic pump/motor (7) links to each other, described the first hydraulic pump/motor (7) and described the second hydraulic pump/motor (8) mechanical linkage, described the second hydraulic pump/motor (8) successively with described the second pressure sensor (9), accumulator (11) links to each other, described control loop (4) respectively with described the first pressure sensor (6), the first hydraulic pump/motor (7), the second hydraulic pump/motor (8), the second pressure sensor (9) links to each other.
2. stored energy hydraulic system as claimed in claim 1 is characterized in that, also comprises the first control valve (5), and described hydraulic circuit (1) links to each other with described the first pressure sensor (6) by described the first control valve (5).
3. stored energy hydraulic system as claimed in claim 2 is characterized in that, also comprises the second control valve (10), and described accumulator (11) links to each other with the second pressure sensor (9) by described the second control valve (10).
4. stored energy hydraulic system as claimed in claim 3 is characterized in that, described the first control valve (5) and/or the second control valve (10) are two position two-way valve.
5. stored energy hydraulic system as claimed in claim 4, it is characterized in that, described the first control valve (5) and/or the second control valve (10) are electromagnetic valve, and described the first control valve (5) and/or the second control valve (10) link to each other with described control loop (4).
6. stored energy hydraulic system as claimed in claim 1 is characterized in that, described control loop (4) is programmable logic controller.
7. an excavator comprises such as each described stored energy hydraulic system of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104038066A CN102864811A (en) | 2012-10-22 | 2012-10-22 | Energy storage hydraulic system and excavator using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104038066A CN102864811A (en) | 2012-10-22 | 2012-10-22 | Energy storage hydraulic system and excavator using same |
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| Publication Number | Publication Date |
|---|---|
| CN102864811A true CN102864811A (en) | 2013-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104038066A Pending CN102864811A (en) | 2012-10-22 | 2012-10-22 | Energy storage hydraulic system and excavator using same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696455A (en) * | 2013-12-16 | 2014-04-02 | 上海三一重机有限公司 | Electro-hydraulic mixed power device, excavator and method |
| GB2558610A (en) * | 2017-01-10 | 2018-07-18 | Bamford Excavators Ltd | Energy recovery system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010035011A1 (en) * | 1996-09-25 | 2001-11-01 | Komatsu Ltd. | Pressurized fluid recovery/reutilization system |
| CN101070864A (en) * | 2007-06-25 | 2007-11-14 | 哈尔滨工业大学 | Energy-store state-liquid driving device of secondary flow-regulation coupling hydraulic energy accumulator |
| CN102501752A (en) * | 2011-11-17 | 2012-06-20 | 广州中国科学院工业技术研究院 | Compressed air and hydraulic hybrid system |
-
2012
- 2012-10-22 CN CN2012104038066A patent/CN102864811A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010035011A1 (en) * | 1996-09-25 | 2001-11-01 | Komatsu Ltd. | Pressurized fluid recovery/reutilization system |
| CN101070864A (en) * | 2007-06-25 | 2007-11-14 | 哈尔滨工业大学 | Energy-store state-liquid driving device of secondary flow-regulation coupling hydraulic energy accumulator |
| CN102501752A (en) * | 2011-11-17 | 2012-06-20 | 广州中国科学院工业技术研究院 | Compressed air and hydraulic hybrid system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696455A (en) * | 2013-12-16 | 2014-04-02 | 上海三一重机有限公司 | Electro-hydraulic mixed power device, excavator and method |
| GB2558610A (en) * | 2017-01-10 | 2018-07-18 | Bamford Excavators Ltd | Energy recovery system |
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| C10 | Entry into substantive examination | ||
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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Cao Donghui Inventor after: Chen Kelei Inventor before: Chen Kelei Inventor before: Wei Xiangyu Inventor before: Cao Jingjing |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: FAN LEI TANG SHIYANG ZHANG XIAOXIN TO: LIU YAN FAN LEI |
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| C12 | Rejection of a patent application after its publication | ||
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Application publication date: 20130109 |