CN105697436B - The small volume cell pressure control hydraulic system that a kind of flow is preferentially supplied - Google Patents
The small volume cell pressure control hydraulic system that a kind of flow is preferentially supplied Download PDFInfo
- Publication number
- CN105697436B CN105697436B CN201610224989.3A CN201610224989A CN105697436B CN 105697436 B CN105697436 B CN 105697436B CN 201610224989 A CN201610224989 A CN 201610224989A CN 105697436 B CN105697436 B CN 105697436B
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- Prior art keywords
- valve
- bit
- flow
- pressure
- pass switch
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- 239000003921 oil Substances 0.000 claims abstract description 49
- 239000002828 fuel tank Substances 0.000 claims abstract description 21
- 150000001875 compounds Chemical class 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000010521 absorption reaction Methods 0.000 claims abstract description 9
- 239000003292 glue Substances 0.000 claims abstract description 7
- 239000010687 lubricating oil Substances 0.000 claims abstract description 7
- 230000009471 action Effects 0.000 claims description 4
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 2
- 239000010720 hydraulic oil Substances 0.000 claims description 2
- 230000006837 decompression Effects 0.000 claims 1
- 238000005461 lubrication Methods 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 description 49
- 230000000087 stabilizing effect Effects 0.000 description 6
- 230000004044 response Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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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
- 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
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D35/00—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
Hydraulic system is controlled the invention discloses the small volume cell pressure that a kind of flow is preferentially supplied.Fuel tank is connected to low pressure blade pump through oil absorption filter, low pressure blade pump is connected respectively to high pressure filter and direct-power safety valve through check valve, high pressure filter is connected to flow pressure-gradient control valve, flow pressure-gradient control valve is connected through flow valve with the lubricating oil pipe that liquid glues clutch, flow pressure-gradient control valve is connected respectively to ratio three-way pressure reducing valve and pilot operated compound relief valve, ratio three-way pressure reducing valve, direct-power safety valve and the equal tieback of pilot operated compound relief valve to fuel tank；Ratio three-way pressure reducing valve outlet oil circuit is divided into two-way, and a switch valve is connected all the way, and another road connects two switch valves, and pipeline is provided with accumulator.The present invention realizes the adjustable supply of big flow flow of lubrication and Small Flow Control oil constant flow rate supply, simultaneously, the operating point of hydraulic system is changed by the switching of switch valve, greatly promotes the stability of small cell pressure control system under conditions of rapidity is not influenceed.
Description
Technical field
The present invention relates to a kind of hydraulic system, more particularly to it is used for one kind that hydro-viscous speed governing clutch list pump pressure is controlled
The small volume cell pressure control hydraulic system that flow is preferentially supplied.
Background technology
Liquid glues one of key subsystem that clutch pressure control hydraulic system glues clutch as liquid, liquid_viscosity regulator from
Clutch is main during running to undertake the effect that control liquid glues clutch spring cylinder pressure, so as to control friction plate spacing to pass
Pass corresponding moment of torsion.Existing control pressurer system using pressure-reducing valve to chamber pressure due to being only controlled, in voltage stabilizing operating mode
Under, when chamber pressure is disturbed generation fluctuation, the unstable of control pressure easily is produced due to overregulating, so that liquid is viscous
Variable-speed clutch governor control characteristics is deteriorated, and results even in the failure of hydro-viscous speed governing clutch.Meanwhile, existing hydraulic system will lubricate
Loop is separated with pressure control loop, respectively using hydraulic pressure oil pump feed, complicated huge, and purchase and maintenance cost are also higher.
The content of the invention
In order to overcome that existing hydro-viscous speed governing clutch pressure control loop Stress control effect is poor, under voltage stabilizing operating mode easily due to
The generation of pressure-reducing valve self character is overregulated, the deficiency that complicated cost is higher, and object of the present invention is to provide one kind stream
The small volume cell pressure control hydraulic system preferentially supplied is measured, the system introduces accumulator and flow pressure-gradient control valve, do not reduced
The defect that pressure-reducing valve overregulates under voltage stabilizing operating mode is overcome on the premise of total system frequency response, by existing lubrication and pressure control loop
Unite two into one, simplify structure, reduce cost.
The technical solution adopted for the present invention to solve the technical problems is：
The present invention include direct-power safety valve, flow valve, the first bi-bit bi-pass switch valve, the second bi-bit bi-pass switch valve,
3rd bi-bit bi-pass switch valve, the 4th bi-bit bi-pass switch valve, ratio three-way pressure reducing valve, flow pressure-gradient control valve, pilot operated compound relief valve,
Direct-power safety valve, high pressure filter, oil absorption filter, accumulator, motor, low pressure blade pump, check valve and fuel tank；Fuel tank is passed through
Oil absorption filter is connected to the oil inlet of low pressure blade pump, low pressure blade pump by motor drive operational, low pressure blade pump it is fuel-displaced
Mouthful it is connected respectively to high pressure filter and direct-power safety valve through check valve, it is preferential that the oil-out of high pressure filter is connected to flow
The 8P mouths of valve, the 8A mouths of flow pressure-gradient control valve are connected through flow valve with the lubricating oil pipe that liquid glues clutch, the 8B mouths of flow pressure-gradient control valve
It is connected respectively to the 7P mouths and pilot operated compound relief valve of ratio three-way pressure reducing valve, the 7T mouths of ratio three-way pressure reducing valve, Direct Action Type safety
Valve and the equal tieback of pilot operated compound relief valve are to fuel tank；The 7A mouths of ratio three-way pressure reducing valve are divided into two-way, all the way through the first bi-bit bi-pass
Switch valve is connected to the oil inlet of the 4th bi-bit bi-pass switch valve, and another road is successively through the second bi-bit bi-pass switch valve and the three or two
Position two-way switch valve is connected to the oil inlet of the 4th bi-bit bi-pass switch valve, the second bi-bit bi-pass switch valve and the 3rd bi-bit bi-pass
Pipeline between switch valve is provided with accumulator, and the oil-out of the 4th bi-bit bi-pass switch valve is connected with fuel tank.
The oil inlet of the 4th described bi-bit bi-pass switch valve is with needing the blind chamber of Stress control to be connected.
The first bi-bit bi-pass switch valve, the second bi-bit bi-pass switch valve, the 3rd bi-bit bi-pass switch valve and accumulator
Decomposition pressure control mode switch loop：When closing the second bi-bit bi-pass switch valve and the 3rd bi-bit bi-pass switch valve, the is opened
During one bi-bit bi-pass switch valve, blind chamber rapid pressure control is carried out；When closing the first bi-bit bi-pass switch valve, the two or two is opened
When two-way switch valve and the 3rd bi-bit bi-pass switch valve, blind chamber steady state pressure control is carried out.
Oil circuit is constituted by the flow valve and flow pressure-gradient control valve, it is ensured that while Stress control has enough hydraulic oil
The unnecessary flow of pump discharge is to flowing to lubricating system.
The present invention is entered in the case of control pressurer system, the single pump of realization while realizing big flow by introducing flow pressure-gradient control valve
Lubricating oil is supplied and Small Flow Control oil is to the Stress control of the blind chamber of small volume, simplifies the same of pump station structure reduction control cost
When, by introducing accumulator and switch valve, change operating point of the pressure-reducing valve in voltage stabilizing state, make small cell pressure control system
Stability greatly promote, and by switching Vavle switching, the characteristic of the quick response of small volume pressure control system is unaffected.
The invention has the advantages that：
Present system realizes that rapid pressure control and steady pressure control two kinds of works by the switching of leak-free switching valve
Operation mode, is significantly dropping the pressure oscillation that generation is disturbed under voltage stabilizing state on the premise of not reducing total system frequency response
Low, the governor control characteristics of hydro-viscous speed governing clutch is improved.
Lubricating loop is incorporated to pressure control loop by the present invention simultaneously, makes the knot of the supporting hydraulic system of hydro-viscous speed governing clutch
Structure is greatly simplified, cost reduction.
Brief description of the drawings
Fig. 1 is the hydraulic system principle figure of the present invention.
In figure：1st, flow valve, the 2, first bi-bit bi-pass switch valve, the 3, second bi-bit bi-pass switch valve, 4, the three or two two
Logical switch valve, 5, accumulator, the 6, the 4th bi-bit bi-pass switch valve, 7, ratio three-way pressure reducing valve, 8, flow pressure-gradient control valve, 9, height presses through
Filter, 10, motor, 11, low pressure blade pump, 12, check valve, 13, pilot operated compound relief valve, 14, oil absorption filter, 15, Direct Action Type
Safety valve, 16, fuel tank.
Embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in figure 1, the present invention includes direct-power safety valve 15, flow valve 1, the first bi-bit bi-pass switch valve the 2, the 2nd 2
Position two-way switch valve 3, the 3rd bi-bit bi-pass switch valve 4, the 4th bi-bit bi-pass switch valve 6, ratio three-way pressure reducing valve 7, flow are excellent
First valve 8, pilot operated compound relief valve 13, high pressure filter 9, oil absorption filter 14, accumulator 5, motor 10, low pressure blade pump 11, list
To valve 12 and fuel tank 16.
As shown in figure 1, motor 10 drives low pressure blade pump 11 to work, the oil inlet of low pressure blade pump 11 connects oil absorption filter
14 outlet, the import access fuel tank 16 of oil absorption filter 14, oil-out and the positive hydraulic fluid port of check valve 12 of low pressure blade pump 11
Be connected, the reverse hydraulic fluid port of check valve 12 and simultaneously and high pressure filter 9 oil inlet and the oil inlet phase of direct-power safety valve 15
Even, the oil-out of direct-power safety valve 15 is connected with pilot operated compound relief valve 13 and fuel tank 16 simultaneously.The oil-out of high pressure filter 9
It is connected with the 8P mouths of flow pressure-gradient control valve 8, the 8A mouths of flow pressure-gradient control valve 8 are connected with the oil inlet 1P of flow valve 1, flow valve 1 goes out
The lubricating oil pipe that hydraulic fluid port 1A glues clutch with liquid is connected.The 7P of the 8B hydraulic fluid ports of flow pressure-gradient control valve 8 simultaneously with ratio three-way pressure reducing valve 7
Hydraulic fluid port is connected with the oil inlet of pilot operated compound relief valve 13, and the 7T hydraulic fluid ports of ratio three-way pressure reducing valve 7 are connected with fuel tank 16.Ratio threeway
The 7A hydraulic fluid ports of pressure-reducing valve 7 simultaneously with the oil inlet of the first bi-bit bi-pass switch valve 2 and the oil inlet phase of the second bi-bit bi-pass switch valve 3
Even, the oil-out of the second bi-bit bi-pass switch valve 3 is connected with the oil inlet of the bi-bit bi-pass switch valve 4 of accumulator 5 and the 3rd simultaneously,
Oil-out, the 4th bi-bit bi-pass switch of the oil-out of first bi-bit bi-pass switch valve 2 simultaneously with the 3rd bi-bit bi-pass switch valve 4
The oil inlet of valve 6 with need the blind chamber of Stress control to be connected, the oil-out of the 4th bi-bit bi-pass switch valve 6 is connected with fuel tank.
The operation principle of the present invention is as follows：
Left side rear support cylinder and right side rear support cylinder work (hereinafter collectively referred to as rear support cylinder) simultaneously.The present invention can be divided into
Three courses of work：Rapid pressure control, steady pressure control and quick relief.
Rapid pressure is controlled：Second bi-bit bi-pass switch valve 3, the 3rd bi-bit bi-pass switch valve 4, the 4th bi-bit bi-pass switch
The dead electricity of valve 6, the first bi-bit bi-pass switch valve 2 obtains electric, and regulation pilot operated compound relief valve 13 is slightly above Control ＆ Protective maximum pressure, adjusts
Amount of restriction pressure-gradient control valve 8 makes the flow of 8B hydraulic fluid ports keep certain, and excess traffic enters flow valve 1 by 8A hydraulic fluid ports, adjusts flow valve 1
It is set to meet lubrication minimum flow requirement.Motor 10 drives the oil suction from fuel tank 16 of low pressure blade pump 11, and low pressure blade pump 11 flows
The fluid gone out flows to the positive hydraulic fluid port of check valve 12.Then entering for direct-power safety valve 15 is flowed to simultaneously from the reverse hydraulic fluid port of check valve 12
The oil inlet of hydraulic fluid port and high pressure filter 9.Unnecessary fluid flows into oil by the oil-out outflow of direct-power safety valve 15 through piping
Case 16.Work fluid is flowed out by the oil-out of high pressure filter 9 and then flows to the 8P hydraulic fluid ports of flow pressure-gradient control valve 8.Lubricating oil by
8A hydraulic fluid ports exit into the 1P hydraulic fluid ports of flow valve 1, and the fluid of the 1A hydraulic fluid ports outflow of flow valve 1 enters the profit of hydro-viscous speed governing clutch
Sliding mechanism.Stress control fluid is exited into the 7P hydraulic fluid ports and pilot operated compound relief valve 13 of ratio three-way pressure reducing valve 7 by 8B hydraulic fluid ports
Oil inlet.By pilot operated compound relief valve 13 unnecessary fluid by oil-out flow out after through piping enter fuel tank.Pressure oil liquid by
Three-way pressure reducing valve 7A hydraulic fluid port passes into the oil inlet of the first bi-bit bi-pass switch valve 2, by the first bi-bit bi-pass switch valve 2
Enter the plunger shaft of hydro-viscous speed governing clutch after oil-out outflow.The unnecessary fluid in part is flowed by the road by three-way pressure reducing valve 7T hydraulic fluid ports
Oil return box.So as to realize quick Stress control.
Steady pressure is controlled：4th bi-bit bi-pass switch valve 6, the dead electricity of the first bi-bit bi-pass switch valve 2, the second bi-bit bi-pass
Switch valve 3, the 3rd bi-bit bi-pass switch valve 4 obtain electric, and regulation pilot operated compound relief valve 13 is slightly above Control ＆ Protective maximum pressure, adjusts
Amount of restriction pressure-gradient control valve 8 makes the flow of 8B hydraulic fluid ports keep certain, and excess traffic enters flow valve 1 by 8A hydraulic fluid ports, adjusts flow valve 1
It is set to meet lubrication minimum flow requirement.Motor 10 drives the oil suction from fuel tank 16 of low pressure blade pump 11, and low pressure blade pump 11 flows
The fluid gone out flows to the positive hydraulic fluid port of check valve 12.Then entering for direct-power safety valve 15 is flowed to simultaneously from the reverse hydraulic fluid port of check valve 12
The oil inlet of hydraulic fluid port and high pressure filter 9.Unnecessary fluid flows into oil by the oil-out outflow of direct-power safety valve 15 through piping
Case 16.Work fluid is flowed out by the oil-out of high pressure filter 9 and then flows to the 8P hydraulic fluid ports of flow pressure-gradient control valve 8.Lubricating oil by
8A hydraulic fluid ports exit into the 1P hydraulic fluid ports of flow valve 1, and the fluid of the 1A hydraulic fluid ports outflow of flow valve 1 enters the profit of hydro-viscous speed governing clutch
Sliding mechanism.Stress control fluid is exited into the 7P hydraulic fluid ports and pilot operated compound relief valve 13 of ratio three-way pressure reducing valve 7 by 8B hydraulic fluid ports
Oil inlet.By pilot operated compound relief valve 13 unnecessary fluid by oil-out flow out after through piping enter fuel tank.Pressure oil liquid by
Three-way pressure reducing valve 7A hydraulic fluid port enters the oil inlet of the second bi-bit bi-pass switch valve 3, by the fuel-displaced of the second bi-bit bi-pass switch valve 3
Enter the oil inlet of the 3rd bi-bit bi-pass switch valve 4 after mouth outflow by accumulator 5, by going out for the 3rd bi-bit bi-pass switch valve 4
Enter the plunger shaft of hydro-viscous speed governing clutch after hydraulic fluid port outflow.The unnecessary fluid in part is flowed back to by the road by three-way pressure reducing valve 7T hydraulic fluid ports
Fuel tank.So as to realize stable Stress control.
Quick relief：4th bi-bit bi-pass switch valve 6 obtains electric, the 3rd bi-bit bi-pass switch valve 4, the first bi-bit bi-pass switch
The dead electricity of valve 2.Fluid is flowed out by hydro-viscous speed governing clutch plunger shaft, into the oil inlet of the 4th bi-bit bi-pass switch valve 6, by the 4th
Enter fuel tank 16 after the oil-out outflow of bi-bit bi-pass switch valve 6.
Thus, present invention disturbance in the case where significantly reducing voltage stabilizing state on the premise of not reducing total system frequency response is produced
Pressure oscillation, improves its Hydraulic Adjustable Speed performance, and the oil circuit compared to existing hydraulic system controls it to protrude significant technique effect.
Claims (3)
1. the small volume cell pressure control hydraulic system that a kind of flow is preferentially supplied, it is characterised in that：Including Direct Action Type safety
Valve (15), flow valve (1), the first bi-bit bi-pass switch valve (2), the second bi-bit bi-pass switch valve (3), the 3rd bi-bit bi-pass switch
Valve (4), the 4th bi-bit bi-pass switch valve (6), ratio three-way pressure reducing valve (7), flow pressure-gradient control valve (8), pilot operated compound relief valve (13),
High pressure filter (9), oil absorption filter (14), accumulator (5), motor (10), low pressure blade pump (11), check valve (12) and oil
Case (16)；
Fuel tank (16) is connected to the oil inlet of low pressure blade pump (11) through oil absorption filter (14), and low pressure blade pump (11) is by motor
(10) work is driven, the oil-out of low pressure blade pump (11) is connected respectively to high pressure filter (9) through check valve and Direct Action Type is pacified
Full valve (15), the oil-out of high pressure filter (9) is connected to the 8P mouths of flow pressure-gradient control valve (8), the 8A mouths warp of flow pressure-gradient control valve (8)
The lubricating oil pipe that flow valve (1) glues clutch with liquid is connected, and the 8B mouths of flow pressure-gradient control valve (8) are connected respectively to ratio threeway decompression
The 7P mouths and pilot operated compound relief valve (13), 7T mouths, direct-power safety valve (15) and the guide of ratio three-way pressure reducing valve (7) of valve (7)
Formula overflow valve (13) tieback is to fuel tank (16)；The 7A mouths of ratio three-way pressure reducing valve (7) are divided into two-way, all the way through the one or two two
Logical switch valve (2) is connected to the oil inlet of the 4th bi-bit bi-pass switch valve (6), and another road is successively through the second bi-bit bi-pass switch valve
(3) and the 3rd bi-bit bi-pass switch valve (4) is connected to the oil inlet of the 4th bi-bit bi-pass switch valve (6), the second bi-bit bi-pass is opened
The pipeline closed between valve (3) and the 3rd bi-bit bi-pass switch valve (4) is provided with accumulator (5), the 4th bi-bit bi-pass switch valve (6)
Oil-out be connected with fuel tank (16)；
The oil inlet of the 4th described bi-bit bi-pass switch valve (6) is with needing the blind chamber of Stress control to be connected.
2. the small volume cell pressure control hydraulic system that a kind of flow according to claim 1 is preferentially supplied, its feature
It is：The first bi-bit bi-pass switch valve (2), the second bi-bit bi-pass switch valve (3), the 3rd bi-bit bi-pass switch valve (4) and
Accumulator (5) decomposition pressure control mode switch loop：When the second bi-bit bi-pass switch valve (3) of closing and the 3rd bi-bit bi-pass are opened
Valve (4) is closed, when opening the first bi-bit bi-pass switch valve (2), blind chamber rapid pressure control is carried out；Opened when closing the first bi-bit bi-pass
Valve (2) is closed, when opening the second bi-bit bi-pass switch valve (3) and the 3rd bi-bit bi-pass switch valve (4), blind chamber steady state pressure control is carried out
System.
3. the small volume cell pressure control hydraulic system that a kind of flow according to claim 1 is preferentially supplied, its feature
It is：The adjustable oil circuit of flow is constituted by the flow valve (1) and flow pressure-gradient control valve (8), it is ensured that Stress control is persevering
The unnecessary flow of pump discharge is to flowing to lubricating system while constant flow hydraulic oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610224989.3A CN105697436B (en) | 2016-04-12 | 2016-04-12 | The small volume cell pressure control hydraulic system that a kind of flow is preferentially supplied |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610224989.3A CN105697436B (en) | 2016-04-12 | 2016-04-12 | The small volume cell pressure control hydraulic system that a kind of flow is preferentially supplied |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105697436A CN105697436A (en) | 2016-06-22 |
| CN105697436B true CN105697436B (en) | 2017-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610224989.3A Expired - Fee Related CN105697436B (en) | 2016-04-12 | 2016-04-12 | The small volume cell pressure control hydraulic system that a kind of flow is preferentially supplied |
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| CN113251015A (en) * | 2021-06-21 | 2021-08-13 | 无锡航试电液系统有限公司 | Switchable servo hydraulic oil source control system |
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| DE19831144A1 (en) * | 1998-07-11 | 2000-01-13 | Mannesmann Rexroth Ag | Hydraulic control for a hydraulically operated clutch / brake combination for the drive shaft of a mechanical press |
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- 2016-04-12 CN CN201610224989.3A patent/CN105697436B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE404622B (en) * | 1973-05-14 | 1978-10-16 | Clark Equipment Co | SYSTEM FOR MANUVERING A PRESSURE FLUID-DRIVEN DEVICE |
| DE19831144A1 (en) * | 1998-07-11 | 2000-01-13 | Mannesmann Rexroth Ag | Hydraulic control for a hydraulically operated clutch / brake combination for the drive shaft of a mechanical press |
| CN1982730A (en) * | 2005-12-13 | 2007-06-20 | 斗山英维高株式会社 | Control apparatus for engine-powered forklifts |
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| Publication number | Publication date |
|---|---|
| CN105697436A (en) | 2016-06-22 |
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