CN105697436A - Hydraulic system with flow priority control function for small-volume blind cavity pressure control - Google Patents

Hydraulic system with flow priority control function for small-volume blind cavity pressure control Download PDF

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Publication number
CN105697436A
CN105697436A CN201610224989.3A CN201610224989A CN105697436A CN 105697436 A CN105697436 A CN 105697436A CN 201610224989 A CN201610224989 A CN 201610224989A CN 105697436 A CN105697436 A CN 105697436A
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China
Prior art keywords
valve
bit
pass switch
pressure
flow
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CN201610224989.3A
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Chinese (zh)
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CN105697436B (en
Inventor
龚国芳
王飞
孙辰晨
廖湘平
石卓
杨华勇
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Zhejiang University ZJU
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Zhejiang University ZJU
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02Installations or systems with accumulators
    • F15B1/04Accumulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044Fluid 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D35/00Fluid clutches in which the clutching is predominantly obtained by fluid adhesion

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Fluid Gearings (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention discloses a hydraulic system with a flow priority control function for small-volume blind cavity pressure control. An oil tank is connected to a low-pressure vane pump through an oil absorption filter; the low-pressure vane pump is connected to a high-pressure filter and a direct-acting safety valve respectively through a check valve; the high-pressure filter is connected to a flow priority valve; the flow priority valve is connected with a lubricating oil pipe of a hydro-viscous clutch through a flow valve; the flow priority valve is connected to a three-way proportional pressure reducing valve and a pilot overflow valve respectively; the three-way proportional pressure reducing valve, the direct-acting safety valve and the pilot overflow valve are all connected back to the oil tank; the outlet oil path of the three-way proportional pressure reducing valve is divided into two paths, one path is connected with one switch valve, and the other path is connected with two switch valves; and an energy accumulator is arranged on a pipeline. According to the hydraulic system disclosed by the invention, adjustable-flow supply for high-flow lubricating oil and constant-flow supply for low-flow control oil are realized; and meanwhile, the working point of the hydraulic system is changed through the switchover of the switch valves, and the stability of the small-volume blind cavity pressure control system is greatly improved under the condition of no influence on rapidity.

Description

The little volume cell pressure that a kind of flow preferentially supplies controls hydraulic system
Technical field
The present invention relates to a kind of hydraulic system, particularly relate to the little volume cell pressure control hydraulic system that a kind of flow for the control of hydro-viscous speed governing clutch list pump pressure preferentially supplies。
Background technology
The viscous clutch pressure control hydraulic system of liquid is one of key subsystem gluing clutch as liquid, mainly undertakes the effect controlling the viscous clutch spring cylinder pressure of liquid, thus controlling friction plate spacing to transmit corresponding moment of torsion in the process that hydro-viscous speed governing clutch runs。Chamber pressure is controlled by existing control pressurer system owing to only using air relief valve, under voltage stabilizing operating mode, when chamber pressure is disturbed generation fluctuation, very easily owing to overregulating the instability producing to control pressure, so that hydro-viscous speed governing clutch governor control characteristics is deteriorated, result even in the inefficacy of hydro-viscous speed governing clutch。Meanwhile, lubricating loop is separated by existing hydraulic system with pressure control loop, uses hydraulic pump fuel feeding respectively, and structure complexity is huge, buys and maintenance cost is also higher。
Summary of the invention
In order to overcome under existing hydro-viscous speed governing clutch pressure control loop Stress control weak effect, voltage stabilizing operating mode easily due to air relief valve self character produce to overregulate, the complicated relatively costly deficiency of structure, it is an object of the invention to provide the little volume cell pressure control hydraulic system that a kind of flow preferentially supplies, this system introduces accumulator and flow pressure-gradient control valve, the defect that under voltage stabilizing operating mode, air relief valve overregulates is overcome under the premise not reducing total system frequency response, existing lubrication and pressure control loop are united two into one, simplify structure, reduce cost。
The technical solution adopted for the present invention to solve the technical problems is:
The present invention includes direct-power safety valve, flow valve, the first bi-bit bi-pass switch valve, the second bi-bit bi-pass switch valve, the 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 connected to the oil-in of low pressure blade pump through oil absorption filter, low pressure blade pump is by motor drive operational, the oil-out of low pressure blade pump is connected respectively to high pressure filter and direct-power safety valve through check valve, the oil-out of high pressure filter is connected to the 8P mouth of flow pressure-gradient control valve, the 8A mouth of flow pressure-gradient control valve is connected through the lubricating oil pipe of the viscous clutch of flow valve and liquid, the 8B mouth of flow pressure-gradient control valve is connected respectively to 7P mouth and the pilot operated compound relief valve of ratio three-way pressure reducing valve, and the 7T mouth of ratio three-way pressure reducing valve, direct-power safety valve and the equal tieback of pilot operated compound relief valve are to fuel tank;The 7A mouth of ratio three-way pressure reducing valve is divided into two-way, one tunnel the first bi-bit bi-pass switch valve is connected to the oil-in of the 4th bi-bit bi-pass switch valve, another road is connected to the oil-in of the 4th bi-bit bi-pass switch valve successively through the second bi-bit bi-pass switch valve and the 3rd bi-bit bi-pass switch valve, pipeline between second bi-bit bi-pass switch valve and the 3rd bi-bit bi-pass 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-in of the 4th described bi-bit bi-pass switch valve is connected with needing pressure controlled blind chamber。
Described 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 composition pressure control mode switching circuit: when closing the second bi-bit bi-pass switch valve and the 3rd bi-bit bi-pass switch valve, when opening the first bi-bit bi-pass switch valve, carry out blind chamber rapid pressure and control;When closing the first bi-bit bi-pass switch valve, when opening the second bi-bit bi-pass switch valve and the 3rd bi-bit bi-pass switch valve, carry out blind chamber steady state pressure and control。
Formed oil circuit by described flow valve and flow pressure-gradient control valve, it is ensured that Stress control have enough hydraulic oil while the unnecessary flow of pump discharge to flowing to lubricating system。
The present invention enters control pressurer system by introducing flow pressure-gradient control valve, realize in single pump situation, realizing the supply of big flow lubricating oil and the Small Flow Control oil Stress control to the blind chamber of little volume simultaneously, while simplifying pump station structure reduction control cost, by introducing accumulator and switch valve, change the air relief valve operating point when voltage stabilizing state, making the stability that little cell pressure controls system be greatly promoted, and switched by switch valve, the characteristic of the quickly response that little volume pressure controls system is unaffected。
The invention have the advantages that:
Present system realizes rapid pressure by the switching of leak-free switching valve and controls and steady pressure two kinds of mode of operations of control, the pressure oscillation that disturbance under voltage stabilizing state produces being greatly lowered under the premise not reducing total system frequency response, the governor control characteristics of hydro-viscous speed governing clutch obtains to be improved。
Lubricating loop is incorporated to pressure control loop by the present invention simultaneously, makes the structure of the supporting hydraulic system of hydro-viscous speed governing clutch be greatly simplified, and cost reduces。
Accompanying drawing explanation
Fig. 1 is the hydraulic system principle figure of the present invention。
In figure: 1, flow valve, the 2, first bi-bit bi-pass switch valve, the 3, second bi-bit bi-pass switch valve, 4, the 3rd bi-bit bi-pass 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, high pressure filter, 10, motor, 11, low pressure blade pump, 12, check valve, 13, pilot operated compound relief valve, 14, oil absorption filter, 15, direct-power safety valve, 16, fuel tank。
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be further described。
As it is shown in figure 1, the present invention includes direct-power safety valve 15, flow valve the 1, first bi-bit bi-pass switch valve the 2, second bi-bit bi-pass switch valve the 3, the 3rd bi-bit bi-pass switch valve the 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, direct-power safety valve 19, high pressure filter 9, oil absorption filter 14, accumulator 5, motor 10, low pressure blade pump 11, check valve 12 and fuel tank 16。
As shown in Figure 1, motor 10 drives low pressure blade pump 11 to work, the oil-in of low pressure blade pump 11 connects the outlet of oil absorption filter 14, the import of oil absorption filter 14 accesses fuel tank 16, the oil-out of low pressure blade pump 11 is connected with check valve 12 forward hydraulic fluid port, the reverse hydraulic fluid port of check valve 12 be connected with the oil-in of direct-power safety valve 15 with the oil-in of high pressure filter 9 simultaneously, be connected with pilot operated compound relief valve 13 and fuel tank 16 while of the oil-out of direct-power safety valve 15。The oil-out of high pressure filter 9 is connected with the 8P mouth of flow pressure-gradient control valve 8, and the 8A mouth of flow pressure-gradient control valve 8 is connected with the oil-in 1P of flow valve 1, and the oil-out 1A of flow valve 1 is connected with the lubricating oil pipe of the viscous clutch of liquid。The 8B hydraulic fluid port of flow pressure-gradient control valve 8 is connected with the 7P hydraulic fluid port of ratio three-way pressure reducing valve 7 and the oil-in of pilot operated compound relief valve 13 simultaneously, and the 7T hydraulic fluid port of ratio three-way pressure reducing valve 7 is connected with fuel tank 16。The 7A hydraulic fluid port of ratio three-way pressure reducing valve 7 is connected with the first bi-bit bi-pass switch valve 2 oil-in and the second bi-bit bi-pass switch valve 3 oil-in simultaneously, the oil-out of the second bi-bit bi-pass switch valve 3 is connected with the oil-in of accumulator 5 and the 3rd bi-bit bi-pass switch valve 4 simultaneously, the oil-out of the first bi-bit bi-pass switch valve 2 simultaneously with the oil-out of the 3rd bi-bit bi-pass switch valve 4, the 4th bi-bit bi-pass switch valve 6 oil-in 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 (being hereinafter collectively referred to as rear support cylinder) simultaneously。The present invention can be divided into three work process: rapid pressure controls, steady pressure controls and quick relief。
Rapid pressure controls: the second bi-bit bi-pass switch valve the 3, the 3rd bi-bit bi-pass switch valve the 4, the 4th bi-bit bi-pass switch valve 6 dead electricity, first bi-bit bi-pass switch valve 2 obtains electric, regulate pilot operated compound relief valve 13 slightly above Control & Protective maximum pressure, regulating flow pressure-gradient control valve 8 makes the flow of 8B hydraulic fluid port keep certain, excess traffic enters flow valve 1 by 8A hydraulic fluid port, regulates flow valve 1 and makes it meet lubrication minimum flow requirement。Motor 10 drives low pressure blade pump 11 oil suction from fuel tank 16, and the fluid that low pressure blade pump 11 flows out flows to check valve 12 forward hydraulic fluid port。Then flow to the oil-in of direct-power safety valve 15 and the oil-in of high pressure filter 9 from the reverse hydraulic fluid port of check valve 12 simultaneously。Unnecessary fluid is flowed out by the oil-out of direct-power safety valve 15 and flows into fuel tank 16 through piping。Work fluid is flowed out by the oil-out of high pressure filter 9 and then flows to the 8P hydraulic fluid port of flow pressure-gradient control valve 8。Lubricating oil is exited into the 1P hydraulic fluid port of flow valve 1 by 8A hydraulic fluid port, and the fluid that the 1A hydraulic fluid port of flow valve 1 flows out enters the lubricating structure of hydro-viscous speed governing clutch。Stress control fluid is exited into the 7P hydraulic fluid port of ratio three-way pressure reducing valve 7 and the oil-in of pilot operated compound relief valve 13 by 8B hydraulic fluid port。Fuel tank is entered through piping after the unnecessary fluid of pilot operated compound relief valve 13 is flowed out by oil-out。Pressure oil liquid is passed into the oil-in of the first bi-bit bi-pass switch valve 2 by the hydraulic fluid port of three-way pressure reducing valve 7A, the oil-out of the first bi-bit bi-pass switch valve 2 enter the plunger shaft of hydro-viscous speed governing clutch after flowing out。The unnecessary fluid of part is flowed back to fuel tank by the road by three-way pressure reducing valve 7T hydraulic fluid port。Thus realizing quick Stress control。
Steady pressure controls: the 4th bi-bit bi-pass switch valve the 6, first bi-bit bi-pass switch valve 2 dead electricity, second bi-bit bi-pass switch valve the 3, the 3rd bi-bit bi-pass switch valve 4 obtains electric, regulate pilot operated compound relief valve 13 slightly above Control & Protective maximum pressure, regulating flow pressure-gradient control valve 8 makes the flow of 8B hydraulic fluid port keep certain, excess traffic enters flow valve 1 by 8A hydraulic fluid port, regulates flow valve 1 and makes it meet lubrication minimum flow requirement。Motor 10 drives low pressure blade pump 11 oil suction from fuel tank 16, and the fluid that low pressure blade pump 11 flows out flows to check valve 12 forward hydraulic fluid port。Then flow to the oil-in of direct-power safety valve 15 and the oil-in of high pressure filter 9 from the reverse hydraulic fluid port of check valve 12 simultaneously。Unnecessary fluid is flowed out by the oil-out of direct-power safety valve 15 and flows into fuel tank 16 through piping。Work fluid is flowed out by the oil-out of high pressure filter 9 and then flows to the 8P hydraulic fluid port of flow pressure-gradient control valve 8。Lubricating oil is exited into the 1P hydraulic fluid port of flow valve 1 by 8A hydraulic fluid port, and the fluid that the 1A hydraulic fluid port of flow valve 1 flows out enters the lubricating structure of hydro-viscous speed governing clutch。Stress control fluid is exited into the 7P hydraulic fluid port of ratio three-way pressure reducing valve 7 and the oil-in of pilot operated compound relief valve 13 by 8B hydraulic fluid port。Fuel tank is entered through piping after the unnecessary fluid of pilot operated compound relief valve 13 is flowed out by oil-out。Pressure oil liquid is entered the oil-in of the second bi-bit bi-pass switch valve 3 by the hydraulic fluid port of three-way pressure reducing valve 7A, enter the oil-in of the 3rd bi-bit bi-pass switch valve 4 after being flowed out by the oil-out of the second bi-bit bi-pass switch valve 3 through accumulator 5, the oil-out of the 3rd bi-bit bi-pass switch valve 4 after flowing out, enter the plunger shaft of hydro-viscous speed governing clutch。The unnecessary fluid of part is flowed back to fuel tank by the road by three-way pressure reducing valve 7T hydraulic fluid port。Thus realizing stable Stress control。
Quick relief: the 4th bi-bit bi-pass switch valve 6 obtains electric, the 3rd bi-bit bi-pass switch valve the 4, first bi-bit bi-pass switch valve 2 dead electricity。Fluid is flowed out by hydro-viscous speed governing clutch plunger shaft, enters the oil-in of the 4th bi-bit bi-pass switch valve 6, the oil-out of the 4th bi-bit bi-pass switch valve 6 enter fuel tank 16 after flowing out。
Thus, the present invention significantly reduces the pressure oscillation that under voltage stabilizing state, disturbance produces under the premise not reducing total system frequency response, improves its Hydraulic Adjustable Speed performance, and the oil circuit comparing existing hydraulic system controls its prominent significant technique effect。

Claims (4)

1. the little volume cell pressure control hydraulic system that a flow preferentially supplies, it is characterized in that: include direct-power safety valve (15), flow valve (1), first bi-bit bi-pass switch valve (2), second bi-bit bi-pass switch valve (3), 3rd bi-bit bi-pass switch valve (4), 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), direct-power safety valve (19), high pressure filter (9), oil absorption filter (14), accumulator (5), motor (10), low pressure blade pump (11), check valve (12) and fuel tank (16);
Fuel tank (16) is connected to the oil-in of low pressure blade pump (11) through oil absorption filter (14), low pressure blade pump (11) is driven work by motor (10), the oil-out of low pressure blade pump (11) is connected respectively to high pressure filter (9) and direct-power safety valve (15) through check valve, the oil-out of high pressure filter (9) is connected to the 8P mouth of flow pressure-gradient control valve (8), the 8A mouth of flow pressure-gradient control valve (8) is connected through the lubricating oil pipe of the viscous clutch of flow valve (1) and liquid, the 8B mouth of flow pressure-gradient control valve (8) is connected respectively to 7P mouth and the pilot operated compound relief valve (13) of ratio three-way pressure reducing valve (7), the 7T mouth of ratio three-way pressure reducing valve (7), direct-power safety valve (15) and pilot operated compound relief valve (13) all tiebacks are to fuel tank (16);The 7A mouth of ratio three-way pressure reducing valve (7) is divided into two-way, one tunnel the first bi-bit bi-pass switch valve (2) is connected to the oil-in of the 4th bi-bit bi-pass switch valve (6), another road is connected to the oil-in of the 4th bi-bit bi-pass switch valve (6) successively through the second bi-bit bi-pass switch valve (3) and the 3rd bi-bit bi-pass switch valve (4), pipeline between second bi-bit bi-pass switch valve (3) and the 3rd bi-bit bi-pass switch valve (4) is provided with accumulator (5), and the oil-out of the 4th bi-bit bi-pass switch valve (6) is connected with fuel tank (16)。
2. the little volume cell pressure that a kind of flow according to claim 1 preferentially supplies controls hydraulic system, it is characterised in that: the oil-in of the 4th described bi-bit bi-pass switch valve (6) is connected with needing pressure controlled blind chamber。
3. the little volume cell pressure that a kind of flow according to claim 1 preferentially supplies controls hydraulic system, it is characterized in that: described 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 closing the second bi-bit bi-pass switch valve (3) and the 3rd bi-bit bi-pass switch valve (4), when opening the first bi-bit bi-pass switch valve (2), carry out blind chamber rapid pressure and control;When closing the first bi-bit bi-pass switch valve (2), when opening the second bi-bit bi-pass switch valve (3) and the 3rd bi-bit bi-pass switch valve (4), carry out blind chamber steady state pressure and control。
4. the little volume cell pressure that a kind of flow according to claim 1 preferentially supplies controls hydraulic system, it is characterized in that: formed the adjustable oil circuit of flow by described flow valve (1) and flow pressure-gradient control valve (8), it is ensured that Stress control have constant flow rate hydraulic oil while the unnecessary flow of pump discharge to flowing to lubricating system。
CN201610224989.3A 2016-04-12 2016-04-12 The small volume cell pressure control hydraulic system that a kind of flow is preferentially supplied Expired - Fee Related CN105697436B (en)

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Cited By (9)

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Publication number Priority date Publication date Assignee Title
CN106523544A (en) * 2016-10-13 2017-03-22 浙江大学 Oil supply and control device for hydraulic clutch
CN107893826A (en) * 2017-11-10 2018-04-10 浙江大学 Hydraulic transformer on mechanically moving is depressured energy-saving HVC hydraulic systems
CN108302079A (en) * 2018-04-04 2018-07-20 徐工集团工程机械股份有限公司科技分公司 A kind of gearbox dynamic output control system and control method
CN108386401A (en) * 2018-04-17 2018-08-10 迪斯油压工业(昆山)有限公司 Hydraulic press quick response system
CN108716487A (en) * 2018-06-11 2018-10-30 雷沃重工股份有限公司 Tractor shares oil hydraulic system and tractor
CN108730244A (en) * 2018-08-13 2018-11-02 徐州徐工基础工程机械有限公司 Hoist motor feeds hydraulic system and method and slotter
CN111749998A (en) * 2020-06-18 2020-10-09 中国煤炭科工集团太原研究院有限公司 Transmission system of mining conveying part, moment limiting speed reducer of transmission system and control method of moment limiting speed reducer
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
CN113605888A (en) * 2021-06-24 2021-11-05 浙江大学 Single-pump driving energy-saving hydraulic system for small-diameter formation tester

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CN105150356A (en) * 2015-07-31 2015-12-16 江苏腾宇机械制造有限公司 Hydraulic control system for brick machine and fully-automatic bidirectionally-pressing hydraulic control method of hydraulic control system

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Publication number Priority date Publication date Assignee Title
CN106523544A (en) * 2016-10-13 2017-03-22 浙江大学 Oil supply and control device for hydraulic clutch
CN107893826B (en) * 2017-11-10 2019-03-01 浙江大学 A kind of energy-saving hydro-viscous speed governing clutch hydraulic system of hydraulic transformer decompression
CN107893826A (en) * 2017-11-10 2018-04-10 浙江大学 Hydraulic transformer on mechanically moving is depressured energy-saving HVC hydraulic systems
CN108302079A (en) * 2018-04-04 2018-07-20 徐工集团工程机械股份有限公司科技分公司 A kind of gearbox dynamic output control system and control method
CN108302079B (en) * 2018-04-04 2023-08-11 徐工集团工程机械股份有限公司科技分公司 Gearbox power output control system and control method
CN108386401A (en) * 2018-04-17 2018-08-10 迪斯油压工业(昆山)有限公司 Hydraulic press quick response system
CN108386401B (en) * 2018-04-17 2023-11-28 迪斯油压工业(昆山)有限公司 Quick response system of oil press
CN108716487A (en) * 2018-06-11 2018-10-30 雷沃重工股份有限公司 Tractor shares oil hydraulic system and tractor
CN108730244A (en) * 2018-08-13 2018-11-02 徐州徐工基础工程机械有限公司 Hoist motor feeds hydraulic system and method and slotter
CN111749998A (en) * 2020-06-18 2020-10-09 中国煤炭科工集团太原研究院有限公司 Transmission system of mining conveying part, moment limiting speed reducer of transmission system and control method of moment limiting speed reducer
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
CN113605888A (en) * 2021-06-24 2021-11-05 浙江大学 Single-pump driving energy-saving hydraulic system for small-diameter formation tester
CN113605888B (en) * 2021-06-24 2023-10-13 浙江大学 Single-pump driving energy-saving hydraulic system for small-diameter stratum tester

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