CN111237264B - Oil circuit structure for realizing accurate control of double-acting oil cylinder - Google Patents
Oil circuit structure for realizing accurate control of double-acting oil cylinder Download PDFInfo
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- CN111237264B CN111237264B CN202010118992.3A CN202010118992A CN111237264B CN 111237264 B CN111237264 B CN 111237264B CN 202010118992 A CN202010118992 A CN 202010118992A CN 111237264 B CN111237264 B CN 111237264B
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- acting
- electromagnetic valve
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- 230000009286 beneficial effect Effects 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006467 substitution reaction 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/027—Installations or systems with accumulators having accumulator charging devices
- F15B1/033—Installations or systems with accumulators having accumulator charging devices with electrical control means
-
- 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
- F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
-
- 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
- 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
- F15B13/0401—Valve members; Fluid interconnections therefor
-
- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
-
- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/202—Externally-operated valves mounted in or on the actuator
-
- 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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- 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
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses an oil way structure for realizing accurate control of a double-acting oil cylinder, which comprises the double-acting oil cylinder, an oil inlet pipeline, an oil outlet pipeline, a first energy accumulator and a second energy accumulator, wherein one end of the oil inlet pipeline is an oil inlet, the other end of the oil inlet pipeline is provided with a first branch pipe and a second branch pipe, the first branch pipe is communicated with a rodless cavity, a first electromagnetic valve, the first energy accumulator and a first two-way flow control valve are arranged on the first branch pipe, the second energy accumulator is communicated with the first branch pipe, the second branch pipe is communicated with a rod cavity of the double-acting oil cylinder, a second electromagnetic valve is arranged on the second branch pipe, a second two-way flow control valve is arranged on the oil outlet pipeline, one end of the oil outlet pipeline is connected with an oil outlet, a third branch flow and a fourth branch flow are formed on the other end of the oil outlet pipeline, a third electromagnetic valve is arranged on the third branch flow and is communicated with the second branch pipe, and the fourth branch flow is communicated with the first branch pipe and is provided with a fourth electromagnetic valve. The oil way can realize the accurate control of the double-acting oil cylinder, has lower overall cost and is more beneficial to popularization and promotion.
Description
Technical Field
The invention relates to the technical field of oil cylinder control, in particular to an oil path structure for realizing accurate control of a double-acting oil cylinder.
Background
The double-acting cylinder refers to a hydraulic cylinder capable of inputting pressure oil from both sides of a piston. It is widely used in various fields. However, since the output of the double-acting cylinder is difficult to control accurately, the double-acting cylinder is difficult to be used in the field of precision machining, for example, in the machining production link of a dry granulator, the movement of a piston rod of the hydraulic cylinder is required to be controlled accurately, and the movement of the piston rod is required to be controlled within +/-0.5 mm. In order to realize the precise control, the hydraulic servo control is generally adopted at present to realize the precise control of the movement of the piston rod of the servo oil cylinder. However, the servo valve, the electro-hydraulic proportional valve and the servo oil cylinder are expensive, so that the control mode has low cost performance and cannot be widely used.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the oil way structure for realizing the accurate control of the double-acting oil cylinder, which can realize the accurate control of the double-acting oil cylinder, meets the use requirement, has simple structure, is beneficial to realization, has lower overall cost, and is more beneficial to popularization and popularization.
In order to achieve the above purpose, the invention provides an oil circuit structure for realizing accurate control of a double-acting oil cylinder, which comprises the double-acting oil cylinder, an oil inlet pipeline, an oil outlet pipeline, a first energy accumulator and a second energy accumulator, wherein one end of the oil inlet pipeline is an oil inlet, the other end of the oil inlet pipeline is provided with a first branch pipe and a second branch pipe, the first branch pipe is communicated with a rodless cavity of the double-acting oil cylinder, a first electromagnetic valve is arranged on the first branch pipe, the first energy accumulator is communicated with the first branch pipe through a first two-way flow control valve, the second energy accumulator is communicated with the first branch pipe and is arranged between the first electromagnetic valve and a rodless cavity, the second branch pipe is communicated with the rod cavity of the double-acting oil cylinder, a second electromagnetic valve is arranged on the second branch pipe, a second two-way flow control valve is arranged on the oil outlet pipeline, one end of the oil outlet pipeline is connected with the oil outlet, a third branch pipe and a fourth branch pipe are formed on the other end of the oil outlet pipeline, the third branch pipe is communicated with the third electromagnetic valve, the third branch pipe and the second branch pipe are communicated with the second branch pipe to form a first communication port, the first communication port is arranged between the second branch pipe and the fourth electromagnetic valve, the second communication port is communicated with the fourth electromagnetic valve and the fourth communication port is arranged between the second communication port and the fourth electromagnetic valve.
The oil cylinder has the beneficial effects that the oil cylinder is arranged in the mode, after the oil is introduced into the oil inlet pipeline, the energy is accumulated in the first energy accumulator and the second energy accumulator, after the energy accumulation is completed, the first electromagnetic valve is closed, and when the control is needed, the equipment is started, so that the pressure of the first energy accumulator is equal to the pressure of the second energy accumulator, and the position of the piston rod of the double-acting oil cylinder can be set or adjusted. When the double-acting piston is required to be controlled to move precisely towards the direction of the rod cavity, the second electromagnetic valve and the third electromagnetic valve are simultaneously opened, and the opening of the second two-way flow control valve is arranged to be slightly larger than the opening of the second two-way flow control valve, so that the oil quantity discharged by the rod cavity of the double-acting oil cylinder is equal to the oil quantity discharged by the second two-way flow control valve minus the oil quantity discharged by the first two-way flow control valve. Further, a displacement sensor can be arranged at the output end of the double-acting cylinder, when the displacement sensor detects that the piston rod reaches a set value, the electromagnetic valve is controlled to be powered off, the piston stops moving, and similarly, when the piston is required to move towards the rodless cavity, the fourth electromagnetic valve and the second electromagnetic valve are simultaneously opened, the pressure of the rodless cavity of the double-acting cylinder gradually decreases, and when the pressure of the rod cavity exceeds the rodless cavity, the piston slowly moves towards the rodless cavity. Therefore, accurate control of the output shaft of the double-acting cylinder is realized, and the combination of the displacement sensor, the electromagnetic valve, the flow control valve and the energy accumulator in the oil way is a device which is always arranged in equipment to be controlled, for example, the displacement sensor, the electromagnetic switch valve, the flow control valve and the energy accumulator are all necessary components of the dry-method granulator, so that extra equipment cost is not increased when the double-acting cylinder is used, only PLC control is required to be set, the structure is very simple, the realization is facilitated, the production cost is low, and the popularization and the use are facilitated.
Further, a plurality of auxiliary energy accumulators are arranged between the second energy accumulator and the double-acting oil cylinder on the first branch pipe, and the auxiliary energy accumulators are communicated with the first branch pipe through electromagnetic switch valves.
The auxiliary energy accumulators are arranged, and because the conventional energy accumulators have limited accumulated pressure, the requirements of all pressure intervals cannot be met, and the auxiliary energy accumulators can be started in different pressure ranges by adding the auxiliary energy accumulators to assist in maintaining the required pressure.
Further, the oil inlet pipeline is also connected with a first flow sensor, and the fourth tributary is connected with a second flow sensor at the position of the second communication port.
The intelligent oil way structure has the beneficial effects that the flow sensor can monitor the flow information of the corresponding position in real time, so that a user can conveniently acquire data, know the oil pressure condition in the oil way, and improve the use effect of the whole oil way structure.
Drawings
Fig. 1 is a schematic diagram of an oil path structure according to an embodiment of the present invention.
Detailed Description
The embodiment of the oil path structure for realizing the accurate control of the double-acting oil cylinder is shown in figure 1, and comprises the double-acting oil cylinder 1, an oil inlet pipeline 2, an oil outlet pipeline 3, a first energy accumulator 71, The second accumulator 72, oil feed line 2 one end is the oil inlet, and the other end is formed with first branch pipe 21 and second branch pipe 22, first branch pipe 21 and double-acting cylinder 1 do not have the pole chamber intercommunication, be provided with first solenoid valve 41 on the first branch pipe 21, first accumulator 71 communicates through first two-way flow control valve 61 and first branch pipe 21, second accumulator 72 communicates and sets up between first solenoid valve 41 and the no pole chamber with first branch pipe 21, second branch pipe 22 has the pole chamber intercommunication with double-acting cylinder 1, be provided with second solenoid valve 42 on the second branch pipe 22, be provided with second two-way flow control valve 62 on the oil outlet line 3, oil outlet line 3 one end is connected with the oil-out, and the other end is formed with third tributary 31 and fourth tributary 32, be provided with third solenoid valve 43 on the third tributary 31, third tributary 31 and second branch pipe 22 communicate and form first connecting port, the first connecting port sets up between second solenoid valve 42 and double-acting cylinder 1 have the pole chamber, be provided with second solenoid valve 42 on the second branch pipe 3, be provided with second branch pipe 21 and fourth connecting port between the second solenoid valve 32 and fourth connecting port is provided with fourth connecting port 32 on the other end. the oil cylinder has the beneficial effects that the oil cylinder is in the form that after the oil is introduced into the oil inlet pipeline 2, energy is accumulated in the first energy accumulator 71 and the second energy accumulator 72, after the energy accumulation is completed, the first electromagnetic valve 41 is closed, and when control is needed, equipment is started, so that the pressure of the first energy accumulator 71 is equal to the pressure of the second energy accumulator 72, and the piston rod position of the double-acting oil cylinder 1 can be set or adjusted. When it is necessary to control the double-acting piston to move precisely in the direction of the rod chamber, the second electromagnetic valve 42 and the third electromagnetic valve 43 are opened simultaneously, and the opening of the second two-way flow control valve 62 is set slightly larger than the opening of the second two-way flow control valve 62, so that the oil amount discharged from the rod chamber of the double-acting cylinder 1 is equal to the oil amount discharged from the second two-way flow control valve minus the oil amount discharged from the first two-way flow control valve, and since the difference between the opening of the second two-way flow control valve and the opening of the first two-way flow control valve is extremely small, the oil amount discharged from the rod chamber of the double-acting cylinder 1 is extremely small, the pressure oil from the rod chamber of the double-acting cylinder 1 is continuously discharged, so that the pressure of the rod chamber is gradually reduced, and the pressure of the rod chamber is gradually higher than that of the rod chamber due to the communication with the second accumulator 72, and the piston slowly moves toward the rod chamber. Further, a displacement sensor can be arranged at the output end of the double-acting cylinder, when the displacement sensor detects that the piston rod reaches a set value, the electromagnetic valve is controlled to be powered off, the piston stops moving, and similarly, when the piston is required to move towards the rodless cavity, the fourth electromagnetic valve 44 and the second electromagnetic valve 42 are simultaneously opened, the pressure of the rodless cavity of the double-acting cylinder 1 gradually decreases, and when the pressure of the rod cavity exceeds the rodless cavity, the piston slowly moves towards the rodless cavity. Therefore, accurate control of the output shaft of the double-acting cylinder is realized, and the combination of the displacement sensor, the electromagnetic valve, the flow control valve and the energy accumulator in the oil way is a device which is always arranged in equipment to be controlled, for example, the displacement sensor, the electromagnetic switch valve 45, the flow control valve and the energy accumulator are all necessary components of the dry-method granulator, so that extra equipment cost is not increased when the double-acting cylinder is used, only PLC control is required to be set, the structure is very simple, the realization is facilitated, and meanwhile, the production cost is low, and the double-acting cylinder granulator is convenient to popularize and use.
Further, a plurality of auxiliary accumulators 73 are arranged on the first branch pipe 21 between the second accumulator 72 and the double-acting cylinder 1, and the auxiliary accumulators 73 are communicated with the first branch pipe 21 through electromagnetic switch valves 45. The auxiliary energy accumulators 73 are arranged, the pressure which can be accumulated by the conventional energy accumulators is limited, the requirements of all pressure intervals cannot be met, the auxiliary energy accumulators 73 can be started in different pressure ranges by adding the energy accumulators, the required pressure is maintained in an auxiliary mode, the structure is simple, implementation is facilitated, and the use effect of the whole structure is improved.
Further, the oil inlet pipe 2 is further connected to a first flow sensor 51, and the fourth tributary 32 is connected to a second flow sensor 52 at a second communication port. The intelligent oil way structure has the beneficial effects that the flow sensor can monitor the flow information of the corresponding position in real time, so that a user can conveniently acquire data, know the oil pressure condition in the oil way, and improve the use effect of the whole oil way structure.
The above examples are only one of the preferred embodiments of the present invention, and the ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are included in the scope of the present invention.
Claims (3)
1. The oil way structure for realizing accurate control of the double-acting oil cylinder comprises the double-acting oil cylinder, an oil inlet pipeline and an oil outlet pipeline, and is characterized by further comprising a first energy accumulator and a second energy accumulator, wherein one end of the oil inlet pipeline is an oil inlet, the other end of the oil inlet pipeline is provided with a first branch pipe and a second branch pipe, the first branch pipe is communicated with a rodless cavity of the double-acting oil cylinder, a first electromagnetic valve is arranged on the first branch pipe, the first energy accumulator is communicated with the first branch pipe through a first two-way flow control valve, the second energy accumulator is communicated with the first branch pipe and is arranged between the first electromagnetic valve and a rodless cavity, the second branch pipe is communicated with a rod cavity of the double-acting oil cylinder, a second electromagnetic valve is arranged on the second branch pipe, one end of the oil outlet pipeline is connected with an oil outlet, a third branch pipe and a fourth branch pipe are formed on the other end of the oil outlet pipeline, the third branch pipe is provided with a third electromagnetic valve, the third branch pipe is communicated with the second branch pipe to form a first communication port, the first communication port is arranged between the second electromagnetic valve and the rod cavity, the second branch pipe is communicated with the fourth electromagnetic valve, and the fourth communication port is formed between the fourth electromagnetic valve and the fourth communication port.
2. The oil path structure for realizing accurate control of a double-acting oil cylinder according to claim 1, wherein a plurality of auxiliary accumulators are arranged between the second accumulator and the double-acting oil cylinder on the first branch pipe, and the auxiliary accumulators are communicated with the first branch pipe through electromagnetic switch valves.
3. The oil path structure for realizing accurate control of a double-acting oil cylinder according to claim 1 or 2, wherein the oil inlet pipe is further connected with a first flow sensor, and the fourth tributary is connected with a second flow sensor at the position of the second communication port.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010118992.3A CN111237264B (en) | 2020-02-26 | 2020-02-26 | Oil circuit structure for realizing accurate control of double-acting oil cylinder |
| PCT/CN2020/106075 WO2021169175A1 (en) | 2020-02-26 | 2020-07-31 | Oilway structure for achieving precise control of double-acting cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010118992.3A CN111237264B (en) | 2020-02-26 | 2020-02-26 | Oil circuit structure for realizing accurate control of double-acting oil cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111237264A CN111237264A (en) | 2020-06-05 |
| CN111237264B true CN111237264B (en) | 2024-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010118992.3A Active CN111237264B (en) | 2020-02-26 | 2020-02-26 | Oil circuit structure for realizing accurate control of double-acting oil cylinder |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111237264B (en) |
| WO (1) | WO2021169175A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237264B (en) * | 2020-02-26 | 2024-11-29 | 浙江迦南科技股份有限公司 | Oil circuit structure for realizing accurate control of double-acting oil cylinder |
| CN114109963B (en) * | 2021-11-19 | 2023-12-15 | 济南悉通液压设备配套有限公司 | Angle machine oil cylinder operation control method and hydraulic system |
| CN118462682B (en) * | 2024-05-27 | 2024-11-01 | 江苏永祥液压设备有限公司 | Oil quantity and speed adjustable oil cylinder and use method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213176218U (en) * | 2020-02-26 | 2021-05-11 | 浙江迦南科技股份有限公司 | Oil circuit structure for realizing precise control of double-acting oil cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA1177726A (en) * | 1981-09-21 | 1984-11-13 | William W. Dollison | Hydraulic cylinder control |
| DE19543876A1 (en) * | 1995-11-24 | 1997-05-28 | Rexroth Mannesmann Gmbh | Method and device for controlling a hydraulic system of an implement |
| JP2002519597A (en) * | 1998-06-27 | 2002-07-02 | ブラーン，ラーズ | Mobile work machine |
| US6755113B2 (en) * | 2002-07-30 | 2004-06-29 | Ha Wse Company Limited | Accumulated semi-active hydraulic damper |
| DE10340504B4 (en) * | 2003-09-03 | 2006-08-24 | Sauer-Danfoss Aps | Valve arrangement for controlling a hydraulic drive |
| DE102004012382B4 (en) * | 2004-03-13 | 2014-03-13 | Deere & Company | Hydraulic arrangement |
| US8079215B2 (en) * | 2006-04-24 | 2011-12-20 | Inova Srl | System and device for uncoupling hydraulic plants |
| CN101532515B (en) * | 2009-04-23 | 2011-04-20 | 福建万新发电设备有限公司 | High-voltage energy-storage hydraulic work device |
| CN104769193B (en) * | 2012-11-09 | 2017-12-19 | 住友重机械工业株式会社 | excavator |
| CN103727290B (en) * | 2013-07-16 | 2015-12-30 | 郭俊杰 | High pulling torque high-temperature high pressure valve energy-saving electric-hydraulic control gear |
| JP6205339B2 (en) * | 2014-08-01 | 2017-09-27 | 株式会社神戸製鋼所 | Hydraulic drive |
| EP2990664A1 (en) * | 2014-08-27 | 2016-03-02 | Siemens Aktiengesellschaft | Hydraulic system |
| CN204961454U (en) * | 2015-09-21 | 2016-01-13 | 常州阿尔菲特机电科技有限公司 | Cylinder multiple spot accurate positioning gas accuse system |
| CN105508319B (en) * | 2016-01-19 | 2016-09-28 | 中国地质大学（武汉） | A kind of low pressure servo source control ultrahigh-pressure hydraulic pressure charging system |
| CN105715597B (en) * | 2016-03-18 | 2018-07-20 | 中冶赛迪工程技术股份有限公司 | Constant backpressure Direct Drive Electro-hydraulic Servo System and its control method |
| CN206144865U (en) * | 2016-10-27 | 2017-05-03 | 郑州广通铁路设备有限公司 | Hydraulic pressure anti -running device is with two pressurize hydraulic system |
| CN106979181B (en) * | 2017-05-15 | 2018-06-08 | 山东大学 | High-energy-efficiency hydraulic servo oil cylinder with bidirectional buffering and precise force control functions |
| DE102018001303A1 (en) * | 2018-02-20 | 2019-08-22 | Hydac Fluidtechnik Gmbh | valve device |
| WO2019188129A1 (en) * | 2018-03-27 | 2019-10-03 | Smc株式会社 | Air cylinder |
| CN111237264B (en) * | 2020-02-26 | 2024-11-29 | 浙江迦南科技股份有限公司 | Oil circuit structure for realizing accurate control of double-acting oil cylinder |
-
2020
- 2020-02-26 CN CN202010118992.3A patent/CN111237264B/en active Active
- 2020-07-31 WO PCT/CN2020/106075 patent/WO2021169175A1/en not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213176218U (en) * | 2020-02-26 | 2021-05-11 | 浙江迦南科技股份有限公司 | Oil circuit structure for realizing precise control of double-acting oil cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111237264A (en) | 2020-06-05 |
| WO2021169175A1 (en) | 2021-09-02 |
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