CN102383769A - Power compensation type hydraulic pressurizing water injection system - Google Patents
Power compensation type hydraulic pressurizing water injection system Download PDFInfo
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- CN102383769A CN102383769A CN2011103102520A CN201110310252A CN102383769A CN 102383769 A CN102383769 A CN 102383769A CN 2011103102520 A CN2011103102520 A CN 2011103102520A CN 201110310252 A CN201110310252 A CN 201110310252A CN 102383769 A CN102383769 A CN 102383769A
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Abstract
The invention relates to a power compensation type hydraulic pressurizing water injection system comprising a double-acting pressurizing cylinder, a three-position four-way reversing valve, a two-position four-way reversing valve, a hydraulic pump station and a water pipeline. The double-acting pressurizing cylinder is provided with three cavities which are divided into six cavities A, B, C, D, E and F from the front end to the rear end by a first piston, a second piston and a third piston, and the three pistons are connected by a first piston rod and a second piston rod respectively; an inlet of the hydraulic pump is connected with an oil tank by a second filter, and an outlet of the hydraulic pump is connected with an energy accumulator, a pressure meter and the three-position four-way reversing valve, and connected with the oil tank by an overflowing valve; and the oil tank is connected with the three-position four-way reversing valve. The power compensation type hydraulic pressurizing water injection system is applied in pressurizing water injection in an oil field, can be used for pressurizing lower-pressure injected water to high-pressure water by hydraulic power compensation, and is simple in structure is simple, low in cost, low in energy consumption and high in pressurizing efficiency.
Description
Technical field
What the present invention relates to is a kind of power compensation formula hydraulic booster flood pattern.
Background technology
Water filling is one of measure of generally adopting of oilfield stimulation.Oil-field flooding pressure height does not wait, if still adopt initial water injection pressure, has satisfied not the high-pressure water injection well requirement; If improve whole ductwork pressure, then need increase step-down equipment at the low pressure water injection well head, so just cause the waste of the energy.The oil field has proposed the pressurized water injection technology of relay-type according to the needs of water filling in recent years, and the investment of rebuilding high-pressure water injecting pump station has been saved in the minority individual well that both had been suitable for occurring in the centrifugal water flooding pump station pipe network and the high pressure water injection of outlying well again.But when injection pressure was very big, the pressurized water injection system that generally adopts at present still can't satisfy waterflooding requirement.
Summary of the invention
The object of the invention provides a kind of power compensation formula hydraulic booster flood pattern, can't satisfy the difficult problem that injection pressure requires only to solve with the incoming-flow pressure supercharging; And control valve reveals when adopting guiding valve greatly, is prone to stop up the problem of functional reliability difference.
For achieving the above object, design of the present invention is: power compensation formula hydraulic booster flood pattern of the present invention is made up of double acting pressurized cylinder, two-position four way change valve group, 3-position 4-way solenoid operated directional valve, hydraulic oil output system, relay etc.; Said double acting pressurized cylinder is designed to six chambeies; Wherein four chambeies fetch the flowing water source; Connect relay-type water filling pressurization system of the common composition of reversal valve group and one way valve; Hydraulic oil is inserted in two chambeies in addition, adopts a hydraulic system that injection water is carried out power compensation and improves its pressure, guarantees to inject water and reaches the injection requirement; Compositions such as said hydraulic system oil pump, fuel tank, one way valve, accumulator, pressure meter, safety valve provide the hydraulic oil of steady pressure for the booster oil pocket; Said reversal valve group is made up of cartridge valve and switching-over ball valve, and the minimizing system reveals, is prone to problems such as obstruction, poor reliability.
Based on the foregoing invention design, the present invention adopts following technical proposals:
A kind of power compensation formula hydraulic booster flood pattern; Comprise double acting pressurized cylinder, three position four-way directional control valve, two-position four way change valve, hydraulic power unit and waterline; It is characterized in that: said double acting pressurized cylinder has three chambeies to be divided into six chambeies of A, B, C, D, E, F of front end to rear end respectively by first, second and the 33 piston, and 3 pistons are connected by the first and second 2 piston rods respectively; Said A chamber is provided with first reversing switch, and through two-position four way change valve and low-pressure line P
dLink to each other or link to each other with waterflood-transmission line P through first strainer; Said B chamber one side outlet is through first one way valve and high pressure line P
gLink to each other, and the opposite side outlet is through the 5th one way valve, stop valve, link to each other with waterflood-transmission line P through first strainer, and warp the 4th one way valve and low-pressure line P
dLink to each other; Said C chamber, D chamber link to each other with hydraulic power unit through three position four-way directional control valve; Said E chamber one side outlet is through second one way valve and high pressure line P
gLink to each other, and the opposite side outlet is through the 3rd one way valve, stop valve, link to each other with waterflood-transmission line P through first strainer, and warp the 4th one way valve and low-pressure line P
dLink to each other; Said F chamber is provided with reversing switch, and through two-position four way change valve and low-pressure line P
dLink to each other or link to each other with waterflood-transmission line P through first strainer; Said hydraulic power unit is made up of hydraulic pump, second strainer, fuel tank, overflow valve, accumulator, pressure meter; Said hydraulic pump import links to each other with fuel tank through second strainer, and outlet links to each other with accumulator, pressure meter, three position four-way directional control valve, and links to each other with fuel tank through overflow valve; Said fuel tank links to each other with three position four-way directional control valve; The injection water of said waterflood-transmission line P through the supercharging of double acting pressurized cylinder after high pressure line Pg flow out; Said hydraulic power unit is that double acting hydraulic cylinder provides pressure compensation, makes the hydraulic pressure through high pressure line output reach higher.
Power compensation formula pressurized water injection according to claim 1 system is characterized in that: three pistons of the parallelly connected common control with the relay of three position four-way directional control valve and two-position four way change valve of first and second reversing switches in A, F chamber are synchronized with the movement in the said double acting pressurized cylinder; C, D chamber are the hydraulic power compensated cavity, through the hydraulic oil after the hydraulic power unit pressurization water injection pressure are compensated.
The present invention compared with prior art; Have following conspicuous outstanding practicality characteristics and remarkable result: (1) is directed against incoming flow hydraulic pressure much smaller than injecting hydraulic pressure; Only depend on flowing water to carry out supercharging and can't reach injection pressure, the present invention adopts a hydraulic booster system to carry out pressure compensation to coming flowing water, is used to flowing water simultaneously and is carrying out to injecting water the pressure effect being arranged too when injecting the water compensation; Make its pressure can reach injection pressure, and improved the efficient of flood pattern greatly.
Description of drawings
Fig. 1 is one embodiment of the present of invention sketch map (state when three position four-way directional control valve and two-position four way change valve all are in position, a left side);
Fig. 2 is one embodiment of the present of invention sketch map (state when three position four-way directional control valve and two-position four way change valve all are in right).
The specific embodiment
The preferred embodiments of the present invention combine detailed description of the drawings following:
Embodiment one:
Referring to Fig. 1; This power compensation formula hydraulic booster flood pattern comprises double acting pressurized cylinder 2, three position four-way directional control valve 16, two-position four way change valve 15, hydraulic power unit 21 and waterline; It is characterized in that: said double acting pressurized cylinder 2 has three chambeies to be divided into six chambeies of A, B, C, D, E, F of front end to rear end respectively by first, second and the 33 piston 3,6,9, and 3 pistons 3,6,9 are connected by the first and second 2 piston rods 5,7 respectively; Said A chamber is provided with first reversing switch 1, and through two-position four way change valve 15 and low-pressure line P
dLink to each other or link to each other with waterflood-transmission line P through first strainer 14; Said B chamber one side outlet is through first one way valve 4 and high pressure line P
gLink to each other, and the opposite side outlet is through the 5th one way valve 24, stop valve 13, link to each other with waterflood-transmission line P through first strainer 14, and through the 4th one way valve 12 and low-pressure line P
dLink to each other; Said C chamber, D chamber link to each other with hydraulic power unit 21 through three position four-way directional control valve 16; Said E chamber one side outlet is through second one way valve 8 and high pressure line P
gLink to each other, and the opposite side outlet is through the 3rd one way valve 11, stop valve 13, link to each other with waterflood-transmission line P through first strainer 14, and through the 4th one way valve 12 and low-pressure line P
dLink to each other; Said F chamber is provided with reversing switch 10, and through two-position four way change valve 15 and low-pressure line P
dLink to each other or link to each other with waterflood-transmission line P through first strainer 14; Said hydraulic power unit 21 is made up of hydraulic pump 20, second strainer 19, fuel tank 17, overflow valve 18, accumulator 23, pressure meter 22; Said hydraulic pump import links to each other with fuel tank 17 through second strainer 19, and outlet links to each other with accumulator 23, pressure meter 22, three position four-way directional control valve 16, and links to each other with fuel tank 17 through overflow valve 18; Said fuel tank 17 links to each other with three position four-way directional control valve 16; The injection water of said waterflood-transmission line P through 2 superchargings of double acting pressurized cylinder after high pressure line Pg flow out; Said hydraulic power unit 21 provides pressure compensation for double acting hydraulic cylinder 2, makes the hydraulic pressure through high pressure line output reach higher.
Embodiment two:
Present embodiment and embodiment one are basic identical, and special feature is following:
Three pistons 3,6,9 of the parallelly connected common control with the relay of three position four-way directional control valve 16 and two-position four way change valve 15 of first and second reversing switches 1,10 in A, F chamber are synchronized with the movement in the said double acting pressurized cylinder 2; C, D chamber are the hydraulic power compensated cavity, through the hydraulic oil after hydraulic power unit 21 pressurizations water injection pressure are compensated.
Operating principle:
When all being positioned at position, a left side referring to accompanying drawing 1 three position four-way directional control valve 16, two-position four way change valve 15; Stop valve 13 is opened; The flowing water that comes of waterflood-transmission line P filters through first strainer 14; A part is through the B chamber and the E chamber of stop valve 13 inflow pressurized cylinders 2, and a part is through two-position four way change valve 15, and the A chamber that flows to pressurized cylinder 2 promotes piston 3 and moves to right; While oil pump 20 sucks the hydraulic oil pressurization after three position four-way directional control valve 16 entering C chambeies promotion pistons 6 move to right through second strainer 19 from fuel tank 17; D chamber hydraulic oil is through three position four-way directional control valve 16 oil sump tanks 17; This moment, the pressure of B chamber water raise, and first one way valve 4 is opened the output water under high pressure to high pressure line P
g, when B chamber hydraulic pressure was higher than injection water hydraulic pressure, the 5th one way valve 24 was closed; Piston B is continuing to move to right under the promotion of A chamber hydraulic pressure and under the drive of piston rod 5, and B chamber hydraulic pressure continues to raise to high pressure line P
gThe output water under high pressure; Piston 9 moves to right under the promotion of piston rod 7, and E chamber hydraulic pressure reduces, as high pressure line P
gHydraulic pressure is during greater than E chamber hydraulic pressure, and second one way valve 8 is closed, and when injecting water hydraulic pressure greater than E chamber hydraulic pressure, the 4th one way valve 11 is opened, and injects water and flows into the E chamber; The hydraulic pressure of F chamber water raises simultaneously, flows into low-pressure line through two-position four way change valve 15.
Referring to accompanying drawing 2 when piston 9 moves to F chamber low order end; Start second reversing switch 10; The three position four-way directional control valve 16 that link to each other with second reversing switch 10 this moment and the relay power of two-position four way change valve 15, their station becomes right position, at this moment injects the P of water through two-position four way change valve 15
1And B
1Mouth flows into the F chamber of pressurized cylinder 2, and the F cavity pressure raises, and the water in A chamber is through the A of two-position four way change valve 15
1, O
1Mouth flows into low-pressure line, and the A cavity pressure reduces; Through the hydraulic oil of hydraulic power unit pressurization P through three position four-way directional control valve 16
2, B
2Mouth flows into the D chamber of pressurized cylinder 2, and the D cavity pressure raises, and C chamber hydraulic oil is through the A of three position four-way directional control valve 16
2, O
2Mouth flows into fuel tank, and the C cavity pressure reduces, and piston 6 receives pressure left, is moved to the left; Stop valve 13 is opened, inject water and get into pressurized cylinder B, E chamber through the 3rd, the 5th one way valve 11, one way valve 24, piston 3,9 respectively under piston rod 5,7 and B, F chamber hydraulic action to moving to left; The B cavity pressure reduces, and the E cavity pressure raises, when B cavity pressure during less than high pressure line Pg pressure; First one way valve 4 is closed; When the E cavity pressure when injecting water pressure, the 3rd one way valve 11 is closed, E chamber inner high voltage water flows out through second one way valve 8; When piston 3 moves to A chamber high order end, touch reversing switch 1, three position four-way directional control valve 16, two-position four way change valve 15 are got back to left station again, and be exactly working method shown in Figure 1 this moment, so back and forth, just realized injecting the lasting supercharging of water.
The manometric pressure of measuring input hydraulic pressure oil that act as, accumulator 22 is used for absorbing surge pressure, and overflow valve 18 makes output hydraulic oil reliable and stable, and one way valve 12 can avoid the pressure of flowing water to be lower than the pressure of low-pressure line.
Claims (2)
1. power compensation formula hydraulic booster flood pattern; Comprise double acting pressurized cylinder (2), three position four-way directional control valve (16), two-position four way change valve (15), hydraulic power unit (21) and waterline; It is characterized in that: said double acting pressurized cylinder (2) has three chambeies to be divided into six chambeies of A, B, C, D, E, F of front end to rear end by first, second and the 33 piston (3,6,9) respectively, and 3 pistons (3,6,9) are connected by the first and second 2 piston rods (5,7) respectively; Said A chamber is provided with first reversing switch (1), and through two-position four way change valve (15) and low-pressure line P
dLink to each other or link to each other with waterflood-transmission line P through first strainer (14); Said B chamber one side outlet is through first one way valve (4) and high pressure line P
gLink to each other, and the opposite side outlet is through the 5th one way valve (24), stop valve (13), link to each other with waterflood-transmission line P through first strainer (14), and through the 4th one way valve (12) and low-pressure line P
dLink to each other; Said C chamber, D chamber link to each other with hydraulic power unit (21) through three position four-way directional control valve (16); Said E chamber one side outlet is through second one way valve (8) and high pressure line P
gLink to each other, and the opposite side outlet is through the 3rd one way valve (11), stop valve (13), link to each other with waterflood-transmission line P through first strainer (14), and through the 4th one way valve (12) and low-pressure line P
dLink to each other; Said F chamber is provided with reversing switch (10), and through two-position four way change valve (15) and low-pressure line P
dLink to each other or link to each other with waterflood-transmission line P through first strainer (14); Said hydraulic power unit (21) is made up of hydraulic pump (20), second strainer (19), fuel tank (17), overflow valve (18), accumulator (23), pressure meter (22); Said hydraulic pump import links to each other with fuel tank (17) through second strainer (19), and outlet links to each other with accumulator (23), pressure meter (22), three position four-way directional control valve (16), and links to each other with fuel tank (17) through overflow valve (18); Said fuel tank (17) links to each other with three position four-way directional control valve (16); The injection water of said waterflood-transmission line P through (2) supercharging of double acting pressurized cylinder after high pressure line Pg flow out; Said hydraulic power unit (21) provides pressure compensation for double acting hydraulic cylinder (2), makes the hydraulic pressure through high pressure line output reach higher.
2. power compensation formula pressurized water injection according to claim 1 system is characterized in that: parallelly connected three pistons (3,6,9) of controlling jointly with the relay of three position four-way directional control valve (16) and two-position four way change valve (15) of first and second reversing switches (1,10) in A, F chamber are synchronized with the movement in the said double acting pressurized cylinder (2); C, D chamber are the hydraulic power compensated cavity, through the hydraulic oil after hydraulic power unit (21) pressurization water injection pressure are compensated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103102520A CN102383769A (en) | 2011-10-14 | 2011-10-14 | Power compensation type hydraulic pressurizing water injection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103102520A CN102383769A (en) | 2011-10-14 | 2011-10-14 | Power compensation type hydraulic pressurizing water injection system |
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| CN102383769A true CN102383769A (en) | 2012-03-21 |
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| CN2011103102520A Pending CN102383769A (en) | 2011-10-14 | 2011-10-14 | Power compensation type hydraulic pressurizing water injection system |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650307A (en) * | 2012-04-27 | 2012-08-29 | 天津市天锻压力机有限公司 | Automatic circulation oil filtering system for oil cylinder of hydraulic press |
| CN102852868A (en) * | 2012-07-29 | 2013-01-02 | 安徽金视界光电科技有限公司 | Fluid supercharging device |
| CN103029174A (en) * | 2012-12-30 | 2013-04-10 | 淮阴工学院 | Control system for coal mine underground water-jet cutting machine |
| CN103836017A (en) * | 2014-02-26 | 2014-06-04 | 长治市永华机械有限公司 | Cavity type automatic special-shaped body reversing mechanism |
| CN104791315A (en) * | 2015-05-05 | 2015-07-22 | 青岛大学 | Continuous fixed ratio hydraulic step-down transformer |
| CN105392959A (en) * | 2013-03-15 | 2016-03-09 | 越洋塞科外汇合营有限公司 | Supercharging pressure in a subsea well system |
| CN106640791A (en) * | 2016-12-16 | 2017-05-10 | 中国科学院地质与地球物理研究所 | Split-type multilayer linkage supercharging oil cylinder |
| CN106870468A (en) * | 2017-03-20 | 2017-06-20 | 姜永达 | Hydraulic pressure positive/negative-pressure interpreter |
| JP2018084270A (en) * | 2016-11-22 | 2018-05-31 | Smc株式会社 | Boosting device |
| CN108482049A (en) * | 2018-03-01 | 2018-09-04 | 燕山大学 | A kind of emergency management and rescue vehicle energy regenerative type Active Suspensions hydraulic control system |
| CN108916133A (en) * | 2018-08-03 | 2018-11-30 | 广州番禺职业技术学院 | A kind of booster and its supercharging device |
| CN109738218A (en) * | 2018-12-28 | 2019-05-10 | 宝鸡石油机械有限责任公司 | A kind of external pressure Work condition analogue experimental rig of drilling and extracting equipment |
| CN110339735A (en) * | 2019-08-08 | 2019-10-18 | 英达热再生有限公司 | A kind of novel slurry mixing grouting system |
| CN111120242A (en) * | 2020-02-14 | 2020-05-08 | 德州学院 | Hydraulic control linkage pressurization injection device |
| CN112360827A (en) * | 2020-12-18 | 2021-02-12 | 福州大学 | Hydraulic circuit system for supercharging diesel generator by adopting hydraulic pump |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2483506Y (en) * | 2001-05-22 | 2002-03-27 | 姚庆余 | Autoamtic pressure-regulating and water injection machine used in oil-field |
| CN1420253A (en) * | 2001-11-21 | 2003-05-28 | 刘桂峰 | Automatic pressure pump for water injection in oil field |
| CN101078396A (en) * | 2007-06-21 | 2007-11-28 | 大庆石油学院 | Differential pressure drive reciprocating double-action booster pump |
| CN101254407A (en) * | 2007-12-12 | 2008-09-03 | 天津大学 | Three-cylinder three piston type recuperator for reverse osmosis seawater desalination |
| CN101666339A (en) * | 2009-09-30 | 2010-03-10 | 山东交通学院 | Hydraulic pressurizer |
| CN201511072U (en) * | 2009-08-27 | 2010-06-23 | 佛山市禅城区永恒液压机械有限公司 | Hydraulic pressurization system |
| CN201621112U (en) * | 2010-04-09 | 2010-11-03 | 江西洪都航空工业集团有限责任公司 | Pressure unit used for oil-gas pressure conversion |
-
2011
- 2011-10-14 CN CN2011103102520A patent/CN102383769A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2483506Y (en) * | 2001-05-22 | 2002-03-27 | 姚庆余 | Autoamtic pressure-regulating and water injection machine used in oil-field |
| CN1420253A (en) * | 2001-11-21 | 2003-05-28 | 刘桂峰 | Automatic pressure pump for water injection in oil field |
| CN101078396A (en) * | 2007-06-21 | 2007-11-28 | 大庆石油学院 | Differential pressure drive reciprocating double-action booster pump |
| CN101254407A (en) * | 2007-12-12 | 2008-09-03 | 天津大学 | Three-cylinder three piston type recuperator for reverse osmosis seawater desalination |
| CN201511072U (en) * | 2009-08-27 | 2010-06-23 | 佛山市禅城区永恒液压机械有限公司 | Hydraulic pressurization system |
| CN101666339A (en) * | 2009-09-30 | 2010-03-10 | 山东交通学院 | Hydraulic pressurizer |
| CN201621112U (en) * | 2010-04-09 | 2010-11-03 | 江西洪都航空工业集团有限责任公司 | Pressure unit used for oil-gas pressure conversion |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650307A (en) * | 2012-04-27 | 2012-08-29 | 天津市天锻压力机有限公司 | Automatic circulation oil filtering system for oil cylinder of hydraulic press |
| CN102852868A (en) * | 2012-07-29 | 2013-01-02 | 安徽金视界光电科技有限公司 | Fluid supercharging device |
| CN103029174A (en) * | 2012-12-30 | 2013-04-10 | 淮阴工学院 | Control system for coal mine underground water-jet cutting machine |
| CN103029174B (en) * | 2012-12-30 | 2014-12-03 | 江苏省电力公司淮安供电公司 | Control system for coal mine underground water-jet cutting machine |
| CN105392959A (en) * | 2013-03-15 | 2016-03-09 | 越洋塞科外汇合营有限公司 | Supercharging pressure in a subsea well system |
| CN103836017A (en) * | 2014-02-26 | 2014-06-04 | 长治市永华机械有限公司 | Cavity type automatic special-shaped body reversing mechanism |
| CN103836017B (en) * | 2014-02-26 | 2016-04-06 | 长治市永华机械有限公司 | Cavity type automation allosome changement |
| CN104791315A (en) * | 2015-05-05 | 2015-07-22 | 青岛大学 | Continuous fixed ratio hydraulic step-down transformer |
| JP2018084270A (en) * | 2016-11-22 | 2018-05-31 | Smc株式会社 | Boosting device |
| TWI646266B (en) * | 2016-11-22 | 2019-01-01 | 日商Ｓｍｃ股份有限公司 | Supercharger |
| CN110036210A (en) * | 2016-11-22 | 2019-07-19 | Smc 株式会社 | Supercharging device |
| CN110036210B (en) * | 2016-11-22 | 2021-03-16 | Smc 株式会社 | Supercharging device |
| CN106640791A (en) * | 2016-12-16 | 2017-05-10 | 中国科学院地质与地球物理研究所 | Split-type multilayer linkage supercharging oil cylinder |
| CN106870468A (en) * | 2017-03-20 | 2017-06-20 | 姜永达 | Hydraulic pressure positive/negative-pressure interpreter |
| CN108482049A (en) * | 2018-03-01 | 2018-09-04 | 燕山大学 | A kind of emergency management and rescue vehicle energy regenerative type Active Suspensions hydraulic control system |
| CN108916133A (en) * | 2018-08-03 | 2018-11-30 | 广州番禺职业技术学院 | A kind of booster and its supercharging device |
| CN109738218A (en) * | 2018-12-28 | 2019-05-10 | 宝鸡石油机械有限责任公司 | A kind of external pressure Work condition analogue experimental rig of drilling and extracting equipment |
| CN110339735A (en) * | 2019-08-08 | 2019-10-18 | 英达热再生有限公司 | A kind of novel slurry mixing grouting system |
| CN111120242A (en) * | 2020-02-14 | 2020-05-08 | 德州学院 | Hydraulic control linkage pressurization injection device |
| CN112360827A (en) * | 2020-12-18 | 2021-02-12 | 福州大学 | Hydraulic circuit system for supercharging diesel generator by adopting hydraulic pump |
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Application publication date: 20120321 |