CN106762991A - The electromechanical actuator of the hydraulic control with steady regulatory function - Google Patents
The electromechanical actuator of the hydraulic control with steady regulatory function Download PDFInfo
- Publication number
- CN106762991A CN106762991A CN201611195389.5A CN201611195389A CN106762991A CN 106762991 A CN106762991 A CN 106762991A CN 201611195389 A CN201611195389 A CN 201611195389A CN 106762991 A CN106762991 A CN 106762991A
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- China
- Prior art keywords
- control
- control unit
- pipeline
- pressure
- branched pipe
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/001—Servomotor systems with fluidic control
-
- 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
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
-
- 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
- F15B21/008—Reduction of noise or vibration
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- 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)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of electromechanical actuator of the hydraulic control with steady regulatory function, including：First hydraulic pipeline；Second hydraulic pipeline and choke valve；Double-action variable displacement motor；First control unit；Second control unit；Regulation oil cylinder；3rd control unit；First external control pipeline and the second external control pipeline.According to the pressure official post of the first external control pipeline and the second external control pipeline, it switches second control unit of the invention between the first position and the second position, so that the switching of the position of the second control unit is controlled by exterior line, so that can be by the discharge capacity of the control double-action variable displacement motor of external control selectivity.Due to being provided with choke valve on quintafurcation pipeline, effectively prevent the flow into the hydraulic oil in rodless cavity excessive and exchange fuel-economizing cylinder and produce impact, and then double-action variable displacement motor discharge capacity is become big suddenly and is produced impact to load, double-action variable displacement motor discharge capacity under steady mobile piston rod is uniformly increased.
Description
Technical field
The present invention relates to electromechanical integration technology area, more particularly to a kind of electromechanics of the hydraulic control with steady regulatory function
Actuator.
Background technology
Double-action variable displacement motor can undertake load in two rotation directions, specifically, as two with double-action variable displacement motor
First working line of individual port connection and the pressure of the second working line are different, and double-action variable displacement motor becomes being capable of driving load.
Such as, when the first working line more than the second working line pressure when, double-action variable displacement motor towards a rotation direction driving load,
And when the first working line is less than the pressure in the second working line, double-action variable displacement motor drives negative towards another rotation direction
Carry.
However, control system of the prior art cannot be according to the pressure control in the first working line and the second working line
The discharge capacity of double-action variable displacement motor processed, that is to say, that no matter the pressure of the first working line and the second working line has much, two-way
The discharge capacity of variable displacement motor is constant, and so as to cause motor, because pressure is excessive, discharge capacity is constant and damage, or causes motor because of pressure mistake
It is small and discharge capacity is constant and is short of power.
The content of the invention
For above-mentioned technical problem present in existing technology, of the invention implementing has steady regulation work(there is provided a kind of
The electromechanical actuator of the hydraulic control of energy.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of electromechanical actuator of the hydraulic control with steady regulatory function, including：
First hydraulic pipeline；
Second hydraulic pipeline；
Double-action variable displacement motor, it is used to be connected with first fluid pressure line and second fluid pressure line；
First control unit, it passes through the first branch line and is connected with first fluid pressure line, by second branched pipe
Road connects with second fluid pressure line；First control unit has makes first branch line and second branched pipe road
The first position blocked, with blocking first branch line, and make the of the second branched pipe road backflow fuel tank
Two positions and with making first branch line backflow fuel tank, and make the 3rd position that the second branched pipe road blocks；
Second control unit, it passes through Three branched pipe road and is connected with first fluid pressure line, by the 4th branched pipe
Road connects with second fluid pressure line；Second control unit has to be blocked an institute Three branched pipe road and makes the described 4th
The first position of branch line conducting and make that the Three branched pipe road turns on and make that the 4th branch line blocks the
Two positions；
Regulation oil cylinder, it includes that cylinder body, the piston being arranged in the cylinder body and one end are connected with the piston, another
The piston rod that is connected with the swash plate of the double-action variable displacement motor after the cylinder body is stretched out at end, and the piston is by the work in the cylinder body
Plug chamber is divided into rod chamber and rodless cavity；The outlet of second control unit is connected with control piper, the control piper point
Into quintafurcation pipeline and the 6th branch line, the quintafurcation pipeline is connected with the rodless cavity, the 6th branched pipe
Road connects with the rod chamber；
3rd control unit, it is arranged on the quintafurcation pipeline, and the 3rd control unit has makes the control
First position and block the control piper and make the rodless cavity backflow fuel tank that tubulation road connects with the rodless cavity
The second place, wherein：
Second control unit has two second unit control mouths, and two second unit control mouths are respectively with the
One external control pipeline and the second external control pipeline connection, so that when the pressure in the first external control pipeline is more than institute
When stating the pressure in the second external control pipeline, second control unit is in the second place, when first external control
When pressure in pipeline is less than the pressure in the second external control pipeline, second control unit is in the second place；
3rd control unit has a 3rd unit control mouth, the 3rd unit control mouth and the control pipe
Road connects, and when the pressure in the control piper increases, the 3rd control unit switches to the second place from first position；
Choke valve is provided with quintafurcation pipeline between the rodless cavity and the 3rd control unit.
Preferably, first control unit has two first module control mouths, the first module control mouth difference
Connected with first branch line and the second branched pipe road, so that when the pressure in first branch line is equal to institute
When stating the pressure in second branched pipe road, first control unit is in first position, when in first branch line
When pressure is more than the pressure in the second branched pipe road, first control unit is in the second place, when described first point
When pressure in bye-pass is less than the pressure in the second branched pipe road, first control unit is in the 3rd position.
Preferably, first control unit is three position three-way change valve.
Preferably, the 3rd control unit is two position three way directional control valve.
Preferably, the 3rd control unit is proportional reversing valve.
Compared with prior art, the beneficial effect of the electromechanical actuator of the hydraulic control with steady regulatory function of the invention
It is：The electromechanical actuator of the hydraulic control with steady regulatory function of the invention by the second control unit and the 3rd control unit with
And regulation oil cylinder coordinates and can effectively prevent because of working line hypertonia to the impact of double-action variable displacement motor.
Pressure official post of second control unit of the invention according to the first external control pipeline and the second external control pipeline
It switches between the first position and the second position, so that the switching of the position of the second control unit is controlled by exterior line
System, so that can be by the discharge capacity of the control double-action variable displacement motor of external control selectivity.
The electromechanical actuator of the hydraulic control with steady regulatory function of the invention on quintafurcation pipeline due to being provided with
Choke valve, when the pressure in the first working line and the second working line is excessive, effectively prevent the liquid into rodless cavity
The flow of force feed is excessive and exchange fuel-economizing cylinder and produce impact, and then double-action variable displacement motor discharge capacity is become big suddenly and is produced to load
Impact, makes double-action variable displacement motor discharge capacity under steady mobile piston rod uniformly increase.
Brief description of the drawings
Fig. 1 is the structural representation of the electromechanical actuator of the hydraulic control with steady regulatory function of the invention.
In figure：
1- double-action variable displacement motors；The working lines of 2- first；The working lines of 3- second；The control units of 4- first；First point of 5-
Bye-pass；6- second branched pipes road；The control units of 7- second；8- Three branched pipes road；The branch lines of 9- the 4th；10- the 3rd is controlled
Unit processed；11- control pipers；12- quintafurcation pipelines；The branch lines of 13- the 6th；14- adjusts oil cylinder；15- fuel tanks；101- is oblique
Disk；16- the first external control pipelines；17- the second external control pipelines；18- choke valves.
Specific embodiment
To make those skilled in the art be better understood from technical scheme, below in conjunction with the accompanying drawings and specific embodiment party
Formula elaborates to the present invention.
As shown in Figure 1 The embodiment provides a kind of electromechanical actuator of the hydraulic control with steady regulatory function,
For the discharge capacity according to operating pressure or operating pressure difference control double-action variable displacement motor 1, there should be the hydraulic control of steady regulatory function
Electromechanical actuator include：First hydraulic pipeline；Second hydraulic pipeline；Double-action variable displacement motor 1, its be used for it is described
First fluid pressure line and second fluid pressure line are connected；First control unit 4, it passes through the first branch line 5 with described
One fluid pressure line is connected, and is connected with second fluid pressure line by second branched pipe road 6；First control unit 4 has
Make first position that first branch line 5 and second branched pipe road 6 block, with making 5 sections of first branch line
It is disconnected, and make the second place of the backflow of second branched pipe road 6 fuel tank 15 and with making the withdrawing oil of the first branch line 5
Case 15, and make the 3rd position that the second branched pipe road 6 blocks；Second control unit 7, its pass through Three branched pipe road 8 with
The first fluid pressure line connection, is connected by the 4th branch line 9 with second fluid pressure line；Second control unit
7 have and institute Three branched pipe road 8 is blocked and make first position that the 4th branch line 9 turns on and make described 3rd point
Bye-pass 8 turns on and makes the second place that the 4th branch line 9 is blocked；Regulation oil cylinder 14, it includes cylinder body, is arranged at institute
The piston in cylinder body and one end is stated to be connected with the piston, the other end stretch out after the cylinder body with the double-action variable displacement motor 1
The connection of swash plate 101 piston rod, the plunger shaft in the cylinder body is divided into rod chamber and rodless cavity by the piston；Described
The outlet of two control units 7 is connected with control piper 11, and the control piper 11 is divided into the branch of quintafurcation pipeline 12 and the 6th
Pipeline 13, the quintafurcation pipeline 12 is connected with the rodless cavity, and the 6th branch line 13 is connected with the rod chamber；
3rd control unit 10, it is arranged on the quintafurcation pipeline 12, and the 3rd control unit 10 has makes the control
First position and the control piper 11 is blocked and is made the rodless cavity withdrawing oil that pipeline 11 is connected with the rodless cavity
The second place of case 15, wherein：Second control unit 7 has two second unit control mouths, two second units
Control mouth is connected with the first external control pipeline 16 and the second external control pipeline 17 respectively, so as to work as first external control
When pressure in pipeline 16 is more than the pressure in the second external control pipeline 17, second control unit 7 is in second
Position, when the pressure in the first external control pipeline 16 is less than the pressure in the second external control pipeline 17, institute
The second control unit 7 is stated in the second place；3rd control unit 10 has a 3rd unit control mouth, the described 3rd
Unit control mouth is connected with the control piper 11, and when the pressure in the control piper 11 increases, the 3rd control is single
Unit 10 switches to the second place from first position；Quintafurcation pipeline between the rodless cavity and the 3rd control unit 10
Choke valve 18 is provided with 12.
Understood according to above-mentioned, when the first working line 2 is more than the second working line 3, the first control unit 4 is in first
Position, the first working line 2 is blocked by the first control unit 4, and the hydraulic oil in the second working line 3 flows back to fuel tank 15, two-way
Variable displacement motor 1 rotates to drive load in one direction.And when the first working line 2 is excessive, make the first external control pipeline
16 pressure is more than the pressure of the second external control pipeline 17, so that the second control unit 7 switches to the second place, so that
Hydraulic oil in first working line 2 is entered in control piper 11 by the second control unit 7, the hydraulic oil in control piper 11
Cause that Unit the 3rd switches to the second place by the 3rd unit control mouth, so that the hydraulic oil oil return box 15 in rodless cavity,
And quintafurcation pipeline 12 is truncated, hydraulic oil in control piper 11 enter rod chamber by the 6th branch line 13 so that
Piston rod is moved towards the direction for increasing the inclination angle of the swash plate 101 of double-action variable displacement motor 1, so that the row of double-action variable displacement motor 1
Amount increase, the situation for increasing the pressure of the first working line of adaptation 2, so as to effectively prevent because the pressure of the first working line 2 increases
Situation that is big and causing double-action variable displacement motor 1 to damage occurs.Correspondingly, when the second working line 3 is more than the first working line 2
When, the first control unit 4 is in the second place, and the second working line 3 is blocked by the first control unit 4, in the first working line 2
Hydraulic oil flow back to fuel tank 15, double-action variable displacement motor 1 rotates to drive load in the opposite direction.And when the mistake of the second working line 3
When big, make the pressure of the second external control pipeline 17 more than the pressure of the first external control pipeline 16, so that the second control is single
Unit 7 switches to first position, so that the hydraulic oil in the second working line 3 enters control piper by the second control unit 7
In 11, the hydraulic oil in control piper 11 causes that Unit the 3rd switches to the second place by the 3rd unit control mouth, so that
Hydraulic oil oil return box 15 in rodless cavity, and quintafurcation pipeline 12 is truncated, the hydraulic oil in control piper 11 is by the 6th
Branch line 13 is into rod chamber so that piston rod is moved towards the direction for increasing the inclination angle of the swash plate 101 of double-action variable displacement motor 1
It is dynamic, so that the discharge capacity increase of double-action variable displacement motor 1, the situation for increasing the pressure of the second working line of adaptation 3, so as to effectively prevent
Stopped causes the situation that double-action variable displacement motor 1 is damaged to occur because the pressure of the second working line 3 increases.
It follows that the second control unit 7 and the 3rd control unit 10 and regulation oil cylinder 14 can be prevented effectively because of work
Make loine pressure it is too high and to the impact of double-action variable displacement motor 1.
Second control unit 7 of the invention is according to the first external control pipeline 16 and the pressure of the second external control pipeline 17
It switches between the first position and the second position for official post, so that exterior line is received in the switching of the position of the second control unit 7
Control so that can by external control selectivity control double-action variable displacement motor 1 discharge capacity.
The electromechanical actuator of the hydraulic control with steady regulatory function of the invention on quintafurcation pipeline 12 due to setting
Choke valve 18, when the pressure in the first working line 2 and the second working line 3 is excessive, effectively prevent and enter rodless cavity
The flow of interior hydraulic oil is excessive and exchange fuel-economizing cylinder 14 and produce impact, and then make the discharge capacity of double-action variable displacement motor 1 become suddenly it is big and
Impact is produced to load, the discharge capacity under steady mobile piston rod of double-action variable displacement motor 1 is uniformly increased.
Preferably, first control unit 4 has two first module control mouths, the first module control mouth difference
Connected with first branch line 5 and the second branched pipe road 6, so that when pressure in first branch line 5 etc.
When pressure in the second branched pipe road 6, first control unit 4 is in first position, when first branched pipe
When pressure in road 5 is more than the pressure in the second branched pipe road 6, first control unit 4 is in the second place, works as institute
When stating pressure in the first branch line 5 less than pressure in the second branched pipe road 6, first control unit 4 is in
3rd position.
Preferably, first control unit 4 is three position three-way change valve.
Preferably, the 3rd control unit 10 is two position three way directional control valve.
Preferably, the 3rd control unit 10 is proportional reversing valve.
Above example is only exemplary embodiment of the invention, is not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can make respectively in essence of the invention and protection domain to the present invention
Modification or equivalent are planted, this modification or equivalent also should be regarded as being within the scope of the present invention.
Claims (5)
1. a kind of electromechanical actuator of the hydraulic control with steady regulatory function, it is characterised in that including：
First hydraulic pipeline；
Second hydraulic pipeline；
Double-action variable displacement motor, it is used to be connected with first fluid pressure line and second fluid pressure line；
First control unit, it passes through the first branch line and is connected with first fluid pressure line, by second branched pipe road with
The second fluid pressure line connection；First control unit has makes first branch line and second branched pipe road cut
Disconnected first position, with blocking first branch line, and the second branched pipe road is flowed back the second of fuel tank
Put and with making first branch line backflow fuel tank, and make the 3rd position that the second branched pipe road blocks；
Second control unit, it passes through Three branched pipe road and is connected with first fluid pressure line, by the 4th branch line with
The second fluid pressure line connection；Second control unit has makes institute Three branched pipe road block and make the 4th branch
First position and the Three branched pipe road is turned on and make the second that the 4th branch line is blocked that pipeline is turned on
Put；
Regulation oil cylinder, it includes that cylinder body, the piston being arranged in the cylinder body and one end are connected with the piston, and the other end is stretched
Go out the piston rod being connected with the swash plate of the double-action variable displacement motor after the cylinder body, the piston is by the plunger shaft in the cylinder body
It is divided into rod chamber and rodless cavity；The outlet of second control unit is connected with control piper, and the control piper is divided into
Quintafurcation pipeline and the 6th branch line, the quintafurcation pipeline are connected with the rodless cavity, the 6th branch line with
The rod chamber connection；
3rd control unit, it is arranged on the quintafurcation pipeline, and the 3rd control unit has makes the control pipe
First position that road connects with the rodless cavity and block the control piper and make the of the rodless cavity backflow fuel tank
Two positions, wherein：
Second control unit has two second unit control mouths, two second unit control mouths respectively with first outside
Portion's control piper and the second external control pipeline connection, so that when the pressure in the first external control pipeline is more than described the
During pressure in two external control pipelines, second control unit is in the second place, when the first external control pipeline
When interior pressure is less than the pressure in the second external control pipeline, second control unit is in the second place；
3rd control unit has a 3rd unit control mouth, and the 3rd unit control mouth connects with the control piper
Logical, when the pressure in the control piper increases, the 3rd control unit switches to the second place from first position；
Choke valve is provided with quintafurcation pipeline between the rodless cavity and the 3rd control unit.
2. the electromechanical actuator of the hydraulic control with steady regulatory function according to claim 1, it is characterised in that described
One control unit have two first module control mouths, the first module control mouth respectively with first branch line and institute
The connection of second branched pipe road is stated, so that when the pressure in first branch line is equal to the pressure in the second branched pipe road
When, first control unit is in first position, when the pressure in first branch line is more than the second branched pipe
During pressure in road, first control unit is in the second place, when the pressure in first branch line is less than described
During pressure in second branched pipe road, first control unit is in the 3rd position.
3. the electromechanical actuator of the hydraulic control with steady regulatory function according to claim 1, it is characterised in that described
One control unit is three position three-way change valve.
4. the electromechanical actuator of the hydraulic control with steady regulatory function according to claim 1, it is characterised in that described
Three control units are two position three way directional control valve.
5. the electromechanical actuator of the hydraulic control with steady regulatory function according to claim 4, it is characterised in that described
Three control units are proportional reversing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611195389.5A CN106762991A (en) | 2016-12-22 | 2016-12-22 | The electromechanical actuator of the hydraulic control with steady regulatory function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611195389.5A CN106762991A (en) | 2016-12-22 | 2016-12-22 | The electromechanical actuator of the hydraulic control with steady regulatory function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106762991A true CN106762991A (en) | 2017-05-31 |
Family
ID=58900330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611195389.5A Pending CN106762991A (en) | 2016-12-22 | 2016-12-22 | The electromechanical actuator of the hydraulic control with steady regulatory function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106762991A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296120A (en) * | 2019-06-14 | 2019-10-01 | 庆安集团有限公司 | A kind of hatch door transient state acting device of low-power requirements |
| CN110332112A (en) * | 2019-06-13 | 2019-10-15 | 江苏理工学院 | A kind of ratio differential pressure type variable vane pump |
| CN110486339A (en) * | 2019-08-27 | 2019-11-22 | 徐州重型机械有限公司 | Motor control system and crane |
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| DE19509869A1 (en) * | 1995-03-17 | 1996-09-26 | Sauer Sundstrand Gmbh & Co | Control and regulation system for automotive hydrostatic drive |
| US5709282A (en) * | 1995-03-31 | 1998-01-20 | Fiat-Hatachi Excavators S.P.A. | Traveling control system for hydraulically driven vehicle |
| CN1570346A (en) * | 2004-05-09 | 2005-01-26 | 浙江大学 | Enclosed return circuit hydraulic beam-pumping unit utilizing frequency conversion technology |
| US20080072749A1 (en) * | 2006-09-27 | 2008-03-27 | Pfaff Joseph L | Hydraulic valve assembly with a pressure compensated directional spool valve and a regeneration shunt valve |
| CN101871477A (en) * | 2010-06-22 | 2010-10-27 | 上海萨澳液压传动有限公司 | Intermediate-pressure control two-position variable axial plunger hydraulic motor |
| CN203639965U (en) * | 2013-10-16 | 2014-06-11 | 天津柳工机械有限公司 | Hydraulic device for traveling of bulldozer |
-
2016
- 2016-12-22 CN CN201611195389.5A patent/CN106762991A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19509869A1 (en) * | 1995-03-17 | 1996-09-26 | Sauer Sundstrand Gmbh & Co | Control and regulation system for automotive hydrostatic drive |
| US5709282A (en) * | 1995-03-31 | 1998-01-20 | Fiat-Hatachi Excavators S.P.A. | Traveling control system for hydraulically driven vehicle |
| CN1570346A (en) * | 2004-05-09 | 2005-01-26 | 浙江大学 | Enclosed return circuit hydraulic beam-pumping unit utilizing frequency conversion technology |
| US20080072749A1 (en) * | 2006-09-27 | 2008-03-27 | Pfaff Joseph L | Hydraulic valve assembly with a pressure compensated directional spool valve and a regeneration shunt valve |
| CN101871477A (en) * | 2010-06-22 | 2010-10-27 | 上海萨澳液压传动有限公司 | Intermediate-pressure control two-position variable axial plunger hydraulic motor |
| CN203639965U (en) * | 2013-10-16 | 2014-06-11 | 天津柳工机械有限公司 | Hydraulic device for traveling of bulldozer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332112A (en) * | 2019-06-13 | 2019-10-15 | 江苏理工学院 | A kind of ratio differential pressure type variable vane pump |
| CN110296120A (en) * | 2019-06-14 | 2019-10-01 | 庆安集团有限公司 | A kind of hatch door transient state acting device of low-power requirements |
| CN110486339A (en) * | 2019-08-27 | 2019-11-22 | 徐州重型机械有限公司 | Motor control system and crane |
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Application publication date: 20170531 |
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