CN104564864A - Double-channel plunger flow assignment electro-hydraulic actuator - Google Patents
Double-channel plunger flow assignment electro-hydraulic actuator Download PDFInfo
- Publication number
- CN104564864A CN104564864A CN201510002560.5A CN201510002560A CN104564864A CN 104564864 A CN104564864 A CN 104564864A CN 201510002560 A CN201510002560 A CN 201510002560A CN 104564864 A CN104564864 A CN 104564864A
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- China
- Prior art keywords
- oil
- way
- pump
- oil circuit
- plunger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
- F15B11/15—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor with special provision for automatic return
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
- F15B13/0444—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors with rotary electric motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20561—Type of pump reversible
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Electromagnetic Pumps, Or The Like (AREA)
Abstract
The invention discloses a double-channel plunger flow assignment electro-hydraulic actuator. The actuator comprises a two-way pump, a two-way oil cylinder, an oil tank and an oil channel system. A forwarding oil supplying first oil outlet and a reversing oil supplying second oil outlet are formed in the two-way pump. The oil channel system comprises a first oil channel communicated with the first oil outlet and a left chamber of the two-way oil cylinder and a second oil channel communicated with the second oil outlet and a right chamber of the two-way oil cylinder. By means of the actuator, two pressure oil is produced through forward and reverse rotation of the two-way pump to be output independently through two channels, and accordingly, the oil cylinder reciprocating is achieved, a traditional solenoid directional valve is not needed, the actuator is simple and reliable, the two-way oil cylinder volume efficiency is high, 'packeted oil' is prevented, oil can be pumped in the low rotation speed, and high-accuracy location control of the pump control system is achieved.
Description
Technical field
The present invention relates to a kind of electrohydraulic control, particularly relate to a kind of Twin channel piston valving electrohydraulic control.
Background technique
Since the eighties in 20th century, along with the development of traditional hydraulic technologies, valve electrohydraulic control presents the trend to miniaturization, integrated direction development.Especially the pump control type hydraulic system that " servo (stepping) motor+double-direction gearpump " that be representative with U.S.'s product is formed, achieve the requirement relying on motor forward and backward to realize oil cylinder commutation, this technology eliminates traditional solenoid directional control valve, control becomes simple, and flame proof point decreases many.But fact proved, because the birth defect of gear pump: inside let out greatly, volumetric efficiency is low, noise is large, low-speed running is unstable, this technology cannot realize high-precision positioning control, does not really play the speed adjusting performance of servo (stepping) motor brilliance.
Summary of the invention
In view of this, the object of this invention is to provide a kind of Twin channel piston valving electrohydraulic control, utilize the forward of two-way pump and counterrotating to produce two strands of pressure oils independently to export through two passages, two-way oil pump volumetric efficiency is high, there is no " pocketed oil " phenomenon, can under lower rotating speed pump oil, control two-way cylinder to-and-fro motion, realize high-precision positioning control.
Twin channel piston valving electrohydraulic control of the present invention, comprises two-way pump, two-way cylinder, fuel tank and oil-way system; Described two-way pump is provided with the second oil outlet of the first oil outlet and the reversion fuel feeding rotating forward fuel feeding; Described oil-way system comprises first oil circuit in connection first oil outlet and the left chamber of two-way cylinder and the second oil circuit being communicated with the second oil outlet and the right chamber of two-way cylinder;
Further, described two-way pump comprises casing, pump shaft, driving mechanism, the first plunger pump and the second plunger pump; Described driving mechanism comprise by the first overrunning clutch be connected to pump shaft for driving the first transmission body of the first plunger pump work and being connected to second transmission body for driving the second plunger pump work of pump shaft by the second overrunning clutch; Described first overrunning clutch is contrary with the second overrunning clutch transmission direction;
Further, the plunger mat of described first plunger pump and the plunger mat of the second plunger pump are all fixedly installed in casing; Described first transmission body and the second transmission body are rotationally connected with casing each via the bearing single-degree-of-freedom coaxially arranged with pump shaft;
Further, described first transmission body comprises the first eccentric adjusting sleeve; Second transmission body comprises the second eccentric adjusting sleeve; Described pump shaft is rotationally connected with the endoporus of the first eccentric adjusting sleeve and the second eccentric adjusting sleeve by bearing single-degree-of-freedom; Described first overrunning clutch and the second overrunning clutch are connected to pump shaft cylindrical and between the first corresponding eccentric adjusting sleeve and the second eccentric adjusting sleeve endoporus;
Further, described first transmission body also comprises the first drive bearing being installed on the first eccentric adjusting sleeve cylindrical; Second transmission body also comprises the second driving shaft being installed on the second eccentric adjusting sleeve cylindrical and holds; The plunger radial of the first plunger pump is supported in the outer ring of the first drive bearing; The plunger radial of the second plunger pump is supported in the outer ring that second driving shaft holds;
Further, described two-way pump also comprises the actuating motor and handwheel that rotate for drive pump shaft;
Further, described oil-way system also comprises and is communicated in the left chamber of two-way cylinder, oil circuit between right chamber and fuel tank; The branch road that described oil circuit connects the left chamber of two-way cylinder is provided with the first Pilot operated check valve being controlled keying by the second oil circuit; The branch road that oil circuit connects the right chamber of two-way cylinder is provided with the second Pilot operated check valve being controlled keying by the first oil circuit;
Further, described oil-way system also comprises the filler opening of connection first plunger pump, in-line between the filler opening of the second plunger pump and fuel tank; The branch road that described in-line is connected to fuel tank is provided with filter; The branch road that described oil circuit is connected to fuel tank is provided with strong magnetic filter;
Further, described first oil circuit and the second oil circuit are equipped with one-way valve;
Further, described first oil circuit and the second oil circuit are equipped with relief valve, pressure transmitter and pressure gauge; The oil circuit control of described relief valve, pressure transmitter, the first Pilot operated check valve and the oil circuit control of the second Pilot operated check valve are all connected to the oil inlet end of the one-way valve on corresponding oil circuit; The oil outlet end of the one-way valve on corresponding oil circuit is located at by described pressure gauge.
The invention has the beneficial effects as follows: Twin channel piston valving electrohydraulic control of the present invention, utilize the forward of two-way pump and counterrotating to produce two strands of pressure oils independently to be exported by two passages, control two-way cylinder to-and-fro motion, without the need to solenoid directional control valve, system is simple and reliable, and two-way pump oil volumetric efficiency is high, does not have " pocketed oil " phenomenon, can under lower rotating speed pump oil, realize high-precision positioning control.
Accompanying drawing explanation
Fig. 1 is hydraulic structure schematic diagram of the present invention.
Embodiment
Fig. 1 is hydraulic structure schematic diagram of the present invention, as shown in the figure: the Twin channel piston valving electrohydraulic control of the present embodiment, comprises two-way pump, two-way cylinder 1, fuel tank 2 and oil-way system; Described two-way pump is provided with the second oil outlet of the first oil outlet and the reversion fuel feeding rotating forward fuel feeding; Described oil-way system comprises first oil circuit 3 in connection first oil outlet and the left chamber of two-way cylinder 1 and the second oil circuit 4 being communicated with the second oil outlet and the right chamber of two-way cylinder 1, namely high-voltage oil liquid is exported by the first oil outlet when two-way pump rotates forward, high-voltage oil liquid is exported by the second oil outlet during two-way pump reversion, independently two oil outlet pump oil are realized each other by the clockwise and anticlockwise of two-way pump, without the need to solenoid directional control valve, system is simple and reliable, can under lower rotating speed pump oil, control two-way cylinder 1 to-and-fro motion, realize high-precision positioning control.
In the present embodiment, described two-way pump comprises casing 5, pump shaft 6, driving mechanism, the first plunger pump 7 and the second plunger pump 8; Described driving mechanism comprise by the first overrunning clutch 9 be connected to pump shaft 6 for drive first plunger pump 7 work the first transmission body and by the second overrunning clutch 10 be connected to pump shaft 6 for drive second plunger pump 8 work the second transmission body; Described first overrunning clutch 9 is contrary with the second overrunning clutch 10 transmission direction, by the setting that the first overrunning clutch 9 is contrary with the second overrunning clutch 10 transmission direction, the secondary part of different overrunning clutchs can be driven respectively to rotate when pump shaft 6 rotates and reverse, and then the forward of pump shaft 6 and counterrotating are converted into two strands of pressure oils independently export, achieve the action of two-way pump oil, volumetric efficiency is high, does not have " pocketed oil " phenomenon, can under lower rotating speed pump oil.
In the present embodiment, the plunger mat of described first plunger pump 7 and the plunger mat of the second plunger pump 8 are all fixedly installed in casing 5; Described first transmission body and the second transmission body are rotationally connected with casing 5 each via with the coaxial bearing single-degree-of-freedom arranged of pump shaft 6; Unique radial force unloading structure, can directly be delivered on casing 5 by bearing when the first transmission body and the second transmission body are subject to radial reaction force, therefore pump shaft 6 and overrunning clutch need not bear radial force, transmitting torque, transmission efficiency promotes greatly, and structure stability is good, failure rate is low.
In the present embodiment, described first transmission body comprises the first eccentric adjusting sleeve 11; Second transmission body comprises the second eccentric adjusting sleeve 12; Described pump shaft 6 is rotationally connected with the endoporus of the first eccentric adjusting sleeve 11 and the second eccentric adjusting sleeve 12 by bearing single-degree-of-freedom; Described first overrunning clutch 9 and the second overrunning clutch 10 are connected to pump shaft 6 cylindrical and between the first corresponding eccentric adjusting sleeve 11 and the second eccentric adjusting sleeve 12 endoporus; Pump shaft 6 forms drive connection with two eccentric adjusting sleeves respectively by two overrunning clutchs, first plunger pump 7 or second plunger pump 8 of eccentric adjusting sleeve cylindrical and corresponding band Self-resetting spring are fitted, when pump shaft 6 suitable/when being rotated counterclockwise, respectively two eccentric adjusting sleeves are driven by overrunning clutch, define the shunting of unidirectional movement, when eccentric adjusting sleeve rotates, corresponding first plunger pump 7 or the second plunger pump 8 just define the action of reciprocating pump oil.
In the present embodiment, described first transmission body also comprises the first drive bearing being installed on the first eccentric adjusting sleeve 11 cylindrical; Second transmission body also comprises the second driving shaft being installed on the second eccentric adjusting sleeve 12 cylindrical and holds; The plunger radial of the first plunger pump 7 is supported in the outer ring of the first drive bearing; The plunger radial of the second plunger pump 8 is supported in the outer ring that second driving shaft holds; Reduce friction, reduce frictional loss, increase the service life, reduce to rotate the resistance caused, energy saving to pump shaft 6.
In the present embodiment, described two-way pump also comprises the actuating motor 13 and handwheel 14 that rotate for drive pump shaft 6, achieve hand/electrically separated, the output shaft of actuating motor 13 is connected to pump shaft 6 by coupling, handwheel 14 is by being connected to pump shaft 6 by clutch mechanism, can clutch mechanism can be connected to the latch between handwheel 14 and pump shaft 6, also can be the jaw positivecontact coupling by shift fork driving axial slide engaging and disengaging.
In the present embodiment, described oil-way system also comprises and is communicated in the left chamber of two-way cylinder 1, oil circuit 15 between right chamber and fuel tank 2; The branch road that described oil circuit 15 connects the left chamber of two-way cylinder 1 is provided with the first Pilot operated check valve 16 being controlled keying by the second oil circuit 4; The branch road that oil circuit 15 connects the right chamber of two-way cylinder 1 is provided with the second Pilot operated check valve 17 being controlled keying by the first oil circuit 3, when two-way pump rotates forward, the pressure oil of the first oil outlet enters the left chamber of two-way cylinder 1 by the first oil circuit 3, the pressure oil of the first oil outlet drives the second Pilot operated check valve 17 to open simultaneously, oil in the right chamber of two-way cylinder 1 gets back to fuel tank 2 by the second Pilot operated check valve 17 smoothly, achieve hydraulic path, during two-way pump reversion, reason is identical; Two-way cylinder 1 both sides useful area size is identical, and consistent into and out of oil mass, system, without the need to being communicated with air, seals completely, and protective significantly improves.
In the present embodiment, described oil-way system also comprises the filler opening of connection first plunger pump 7, in-line 18 between the filler opening of the second plunger pump 8 and fuel tank 2; The branch road that described in-line 18 is connected to fuel tank 2 is provided with filter 19; The branch road that described oil circuit 15 is connected to fuel tank 2 is provided with strong magnetic filter 20; Solid particle and tiny irony abrasive particle can be removed by filter 19 and strong magnetic filter 20, at utmost ensure that the clean of fluid.
In the present embodiment, described first oil circuit 3 and the second oil circuit 4 are equipped with one-way valve 21, and self-locking performance is good.
In the present embodiment, described first oil circuit 3 and the second oil circuit 4 are equipped with relief valve 22, pressure transmitter 23 and pressure gauge 24; Described relief valve 22, the oil circuit control of pressure transmitter 23, first Pilot operated check valve 16 and the oil circuit control of the second Pilot operated check valve 17 are all connected to the oil inlet end of the one-way valve 21 on corresponding oil circuit; The oil outlet end of the one-way valve 21 on corresponding oil circuit is located at by described pressure gauge 24; First oil circuit 3 and the omnidistance pressure monitoring of the second oil circuit 4, relief valve ensure that motor nonoverload, arranges pressure transmitter 23 and can realize pressure Real-Time Monitoring, and feed back to control box.
What finally illustrate is, above embodiment is only in order to illustrate technological scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technological scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (10)
1. a Twin channel piston valving electrohydraulic control, is characterized in that: comprise two-way pump, two-way cylinder, fuel tank and oil-way system; Described two-way pump is provided with the second oil outlet of the first oil outlet and the reversion fuel feeding rotating forward fuel feeding; Described oil-way system comprises first oil circuit in connection first oil outlet and the left chamber of two-way cylinder and the second oil circuit being communicated with the second oil outlet and the right chamber of two-way cylinder.
2. Twin channel piston valving electrohydraulic control according to claim 1, is characterized in that: described two-way pump comprises casing, pump shaft, driving mechanism, the first plunger pump and the second plunger pump; Described driving mechanism comprise by the first overrunning clutch be connected to pump shaft for driving the first transmission body of the first plunger pump work and being connected to second transmission body for driving the second plunger pump work of pump shaft by the second overrunning clutch; Described first overrunning clutch is contrary with the second overrunning clutch transmission direction.
3. Twin channel piston valving electrohydraulic control according to claim 2, is characterized in that: the plunger mat of described first plunger pump and the plunger mat of the second plunger pump are all fixedly installed in casing; Described first transmission body and the second transmission body are rotationally connected with casing each via the bearing single-degree-of-freedom coaxially arranged with pump shaft.
4. Twin channel piston valving electrohydraulic control according to claim 3, is characterized in that: described first transmission body comprises the first eccentric adjusting sleeve; Second transmission body comprises the second eccentric adjusting sleeve; Described pump shaft is rotationally connected with the endoporus of the first eccentric adjusting sleeve and the second eccentric adjusting sleeve by bearing single-degree-of-freedom; Described first overrunning clutch and the second overrunning clutch are connected to pump shaft cylindrical and between the first corresponding eccentric adjusting sleeve and the second eccentric adjusting sleeve endoporus.
5. Twin channel piston valving electrohydraulic control according to claim 4, is characterized in that: described first transmission body also comprises the first drive bearing being installed on the first eccentric adjusting sleeve cylindrical; Second transmission body also comprises the second driving shaft being installed on the second eccentric adjusting sleeve cylindrical and holds; The plunger radial of the first plunger pump is supported in the outer ring of the first drive bearing; The plunger radial of the second plunger pump is supported in the outer ring that second driving shaft holds.
6. Twin channel piston valving electrohydraulic control according to claim 5, is characterized in that: described two-way pump also comprises the actuating motor and handwheel that rotate for drive pump shaft.
7. the Twin channel piston valving electrohydraulic control according to the arbitrary claim of claim 1-6, is characterized in that: described oil-way system also comprises and is communicated in the left chamber of two-way cylinder, oil circuit between right chamber and fuel tank; The branch road that described oil circuit connects the left chamber of two-way cylinder is provided with the first Pilot operated check valve being controlled keying by the second oil circuit; The branch road that oil circuit connects the right chamber of two-way cylinder is provided with the second Pilot operated check valve being controlled keying by the first oil circuit.
8. Twin channel piston valving electrohydraulic control according to claim 7, is characterized in that: described oil-way system also comprises the filler opening of connection first plunger pump, in-line between the filler opening of the second plunger pump and fuel tank; The branch road that described in-line is connected to fuel tank is provided with filter; The branch road that described oil circuit is connected to fuel tank is provided with strong magnetic filter.
9. the Twin channel piston valving electrohydraulic control according to the arbitrary claim of claim 1-6, is characterized in that: described first oil circuit and the second oil circuit are equipped with one-way valve.
10. Twin channel piston valving electrohydraulic control according to claim 9, is characterized in that: described first oil circuit and the second oil circuit are equipped with relief valve, pressure transmitter and pressure gauge; The oil circuit control of described relief valve, pressure transmitter, the first Pilot operated check valve and the oil circuit control of the second Pilot operated check valve are all connected to the oil inlet end of the one-way valve on corresponding oil circuit; The oil outlet end of the one-way valve on corresponding oil circuit is located at by described pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510002560.5A CN104564864A (en) | 2015-01-05 | 2015-01-05 | Double-channel plunger flow assignment electro-hydraulic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510002560.5A CN104564864A (en) | 2015-01-05 | 2015-01-05 | Double-channel plunger flow assignment electro-hydraulic actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104564864A true CN104564864A (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510002560.5A Pending CN104564864A (en) | 2015-01-05 | 2015-01-05 | Double-channel plunger flow assignment electro-hydraulic actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104564864A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658707A (en) * | 2022-03-31 | 2022-06-24 | 中国船舶重工集团公司第七0七研究所九江分部 | Low-noise bidirectional servo pump source |
| DE102021126101A1 (en) | 2021-10-07 | 2023-04-13 | Weber-Hydraulik Gmbh | Hydraulic or pneumatic pump |
| FR3130329A1 (en) * | 2021-12-13 | 2023-06-16 | Sogefi Filtration | Filtration system for electro-hydraulic power steering system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3833484A1 (en) * | 1988-10-01 | 1990-04-05 | Asea Brown Boveri | Drive device for an electrical switching apparatus |
| CN2550527Y (en) * | 2002-06-26 | 2003-05-14 | 欧学翠 | Double cavity high pressure pump |
| CN2596064Y (en) * | 2001-11-01 | 2003-12-31 | 薛永文 | Single axis two direction plunger pump |
| CN204572597U (en) * | 2015-01-05 | 2015-08-19 | 重庆川仪自动化股份有限公司 | Twin channel piston valving electrohydraulic control |
-
2015
- 2015-01-05 CN CN201510002560.5A patent/CN104564864A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3833484A1 (en) * | 1988-10-01 | 1990-04-05 | Asea Brown Boveri | Drive device for an electrical switching apparatus |
| CN2596064Y (en) * | 2001-11-01 | 2003-12-31 | 薛永文 | Single axis two direction plunger pump |
| CN2550527Y (en) * | 2002-06-26 | 2003-05-14 | 欧学翠 | Double cavity high pressure pump |
| CN204572597U (en) * | 2015-01-05 | 2015-08-19 | 重庆川仪自动化股份有限公司 | Twin channel piston valving electrohydraulic control |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021126101A1 (en) | 2021-10-07 | 2023-04-13 | Weber-Hydraulik Gmbh | Hydraulic or pneumatic pump |
| FR3130329A1 (en) * | 2021-12-13 | 2023-06-16 | Sogefi Filtration | Filtration system for electro-hydraulic power steering system |
| CN114658707A (en) * | 2022-03-31 | 2022-06-24 | 中国船舶重工集团公司第七0七研究所九江分部 | Low-noise bidirectional servo pump source |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20150429 |