CN104121255A - Electric-hydraulic proportional loop system - Google Patents

Electric-hydraulic proportional loop system Download PDF

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Publication number
CN104121255A
CN104121255A CN201410341288.9A CN201410341288A CN104121255A CN 104121255 A CN104121255 A CN 104121255A CN 201410341288 A CN201410341288 A CN 201410341288A CN 104121255 A CN104121255 A CN 104121255A
Authority
CN
China
Prior art keywords
valve
proporting
brake switch
combination brake
master cylinder
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.)
Granted
Application number
CN201410341288.9A
Other languages
Chinese (zh)
Other versions
CN104121255B (en
Inventor
周建智
朱张蓓
陆佳南
陈锦翔
朱富云
丁然
许建刚
罗铁华
陆志辉
徐勤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Nantong Power Supply Co of Jiangsu Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Nantong Power Supply Co of Jiangsu Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, State Grid Jiangsu Electric Power Co Ltd, Nantong Power Supply Co of Jiangsu Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201610163446.5A priority Critical patent/CN105697471A/en
Priority to CN201610163451.6A priority patent/CN105697462A/en
Priority to CN201610163447.XA priority patent/CN105697472A/en
Priority to CN201610163454.XA priority patent/CN105697473A/en
Priority to CN201410341288.9A priority patent/CN104121255B/en
Priority to CN201610163449.9A priority patent/CN105805061A/en
Publication of CN104121255A publication Critical patent/CN104121255A/en
Application granted granted Critical
Publication of CN104121255B publication Critical patent/CN104121255B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
    • F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
    • F15B9/09—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor 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
    • 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
    • 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
    • F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices 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
    • 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
    • F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
    • F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves
    • 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
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2869—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using electromagnetic radiation, e.g. radar or microwaves
    • F15B15/2876—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using electromagnetic radiation, e.g. radar or microwaves using optical means, e.g. laser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/65—Methods of control of the load sensing pressure
    • F15B2211/651—Methods of control of the load sensing pressure characterised by the way the load pressure is communicated to the load sensing circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6656—Closed loop control, i.e. control using feedback

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Toxicology (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention discloses an electric-hydraulic proportional loop system. A pump is connected with a secondary combination valve composed of a cartridge valve and a reversing valve controlled by a PLC, the second-level combination valve is communicated with a rodless cavity of a main cylinder, a rod cavity of the main cylinder is communicated with a third-level combination valve composed of an overflow valve, a reversing valve and a cartridge valve, and the third-level combination valve is communicated with an oil tank. Pressure sensors are arranged on the rodless cavity and the rod cavity of the main cylinder respectively, in addition, a grating ruler used for sensing the position signal of a piston of the main cylinder is arranged, the pressure sensors and the grating ruler are connected with the PLC, and the PLC is connected with a driver for controlling a synchronous servo motor to work. The rodless cavity of the main cylinder is connected with an oil topping-up tank through a hydraulic control one-way valve. The electric-hydraulic proportional loop system is reasonable in structure and can effectively improve the pressing effect.

Description

Electric-hydraulic proportion circuit system
Technical field
The present invention relates to a kind of electric-hydraulic proportion circuit system.
Background technique
In the process of the compacted products of hydraulic equipment, the overshoot of position and pressure is to cause one of principal element that goods precision is inadequate.Overshoot is often because the response lag of Detecting element (as pressure transducer, displacement transducer), selector valve etc., reaching life period interval between setting value and fuel cut-off, oil hydraulic pump has unnecessary hydraulic oil to flow out, unnecessary hydraulic oil enters master cylinder, inevitable build-up of pressure overshoot or position overshoot.And piston rod deadweight is very large, under effect of inertia, be difficult to stop immediately, be also one of factor causing overshoot.
Also there is pressure controlled problem in the hydraulic system using at power equipment.
Summary of the invention
The object of the present invention is to provide one rational in infrastructure, can effectively improve the electric-hydraulic proportion circuit system of suppression performance.
Technical solution of the present invention is:
A kind of electric-hydraulic proportion circuit system, comprise fuel tank, pump, it is characterized in that: pump adopts the metering pump of synchronous servo motor control, pump be connected by cartridge valve and the secondary combination brake switch and proporting that formed by the selector valve of PLC controller control, secondary combination brake switch and proporting communicates with the rodless cavity of master cylinder, the rod chamber of master cylinder communicates with three grades of combination brake switch and proporting that are made up of relief valve, selector valve, cartridge valve, and three grades of combination brake switch and proporting communicate with fuel tank; On the rodless cavity of master cylinder, rod chamber, pressure transducer is all set, separately be provided with the grating scale of perception master cylinder piston position signal, described pressure transducer, grating scale are all connected with PLC controller, and PLC controller is connected with the driver of controlling synchronous servo motor work; The rodless cavity of master cylinder is connected with oil feeding reservoir by Pilot operated check valve, described actuating motor, metering pump and driver composition speed change energy driver; Speed change energy driver is controlled flow system flow entirety, containing the secondary combination brake switch and proporting of high speed selector valve, flow system flow is accurately controlled, and containing three grades of combination brake switch and proporting of proportional pressure control valve, system pressure is accurately controlled.
The selector valve that is subject to the control of PLC controller in secondary combination brake switch and proporting is common selector valve or high speed selector valve.
Relief valve in three grades of combination brake switch and proporting is common relief valve or proportional pressure control valve.
The present invention is rational in infrastructure, can effectively improve suppression performance, good working effect.Applicable to various hydraulic equipments including electric power system.
Brief description of the drawings
Fig. 1 is the structural representation of one embodiment of the invention.
Figure comprises: actuating motor 3, metering pump 4, oil purifier 5, fuel tank 6, selector valve 7,13,14,19, relief valve 8,15, cartridge valve 9,10,16,17, master cylinder 21, oil-supplementing system 20(oil feeding reservoir and Pilot operated check valve), pressure transducer 22, grating scale 23, PLC controller 1 and driver 2 etc.
Embodiment
Embodiment 1:
A kind of electric-hydraulic proportion circuit system, comprise fuel tank 6, pump 4, pump adopts the gear quantitative pump of synchronous servo motor control, pump be connected by cartridge valve 17 and the secondary combination brake switch and proporting that formed by the selector valve 19 of PLC controller control, secondary combination brake switch and proporting communicates with the rodless cavity of master cylinder 21, the rod chamber of master cylinder communicates with three grades of combination brake switch and proporting that are made up of relief valve 8, selector valve 7, cartridge valve 9, and three grades of combination brake switch and proporting communicate with fuel tank 6; On the rodless cavity of master cylinder, rod chamber, pressure transducer 22 is all set, separately be provided with the grating scale 23 of perception master cylinder piston position signal, described pressure transducer, grating scale are all connected with PLC controller 1, and PLC controller is connected with the driver 2 of controlling synchronous servo motor work; The rodless cavity of master cylinder is connected with oil feeding reservoir by Pilot operated check valve, described actuating motor, metering pump and driver composition speed change energy driver; Speed change energy driver is controlled flow system flow entirety, containing the secondary combination brake switch and proporting of high speed selector valve, flow system flow is accurately controlled, and containing three grades of combination brake switch and proporting of proportional pressure control valve, system pressure is accurately controlled.
The selector valve that is subject to the control of PLC controller in secondary combination brake switch and proporting is common selector valve or high speed selector valve.
Relief valve in three grades of combination brake switch and proporting is common relief valve or proportional pressure control valve.
When quick, when descending, speed change energy source device (the gear quantitative pump of synchronous servo motor control) output flow is opened cartridge valve 17 by common selector valve 19, makes pressure oil enter the rodless cavity of master cylinder 21, descent of piston.In the time that rod chamber pressure is greater than relief valve 8 setting value, relief valve 8 is opened, and unnecessary fluid is got back to fuel tank through cartridge valve 7.When descending at a slow speed, grating scale 23 gathers the position signal of piston rod in real time, and sends PLC controller 1 to, then makes accordingly corresponding action by driver 2.The downstream position of piston is set to desired value, and when piston continues descendingly while reaching precalculated position, PLC controller 1 sends and refers to the modern rotating speed that changes actuating motor 3, thereby the output flow of pump is diminished realize descending at a slow speed.The common relief valve 8 of the fluctuation pressure release smoothly that changes in flow rate causes.In the time of pressurize, the position signal feeding back according to the feedback signal of pressure transducer 22 and grating scale 23, PLC controller 1 sends signal immediately acts accordingly selector valve 19.Meanwhile, PLC controller 1 sends signal actuating motor is stopped operating.System responses lags behind and the overshoot that causes can be passed through relief valve 8 pressure releases.In the time wanting quick return, PLC controller 1 sends instruction, and master cylinder is in backhaul state.
Native system uses grating scale 23 Real-time Feedback piston rod position, compares the general position limit switch just using of other powder forming special hydraulic press, has speed of response faster.Wherein variable speed energy source device can, according to the demand automatic adjustment system flow of load, reach the reasonable disposition of flow.
In figure, also have flow controller 11,18, valve 12.

Claims (3)

1. an electric-hydraulic proportion circuit system, comprise fuel tank, pump, it is characterized in that: pump adopts the metering pump of synchronous servo motor control, pump be connected by cartridge valve and the secondary combination brake switch and proporting that formed by the selector valve of PLC controller control, secondary combination brake switch and proporting communicates with the rodless cavity of master cylinder, the rod chamber of master cylinder communicates with three grades of combination brake switch and proporting that are made up of relief valve, selector valve, cartridge valve, and three grades of combination brake switch and proporting communicate with fuel tank; On the rodless cavity of master cylinder, rod chamber, pressure transducer is all set, separately be provided with the grating scale of perception master cylinder piston position signal, described pressure transducer, grating scale are all connected with PLC controller, and PLC controller is connected with the driver of controlling synchronous servo motor work; The rodless cavity of master cylinder is connected with oil feeding reservoir by Pilot operated check valve, described actuating motor, metering pump and driver composition speed change energy driver; Speed change energy driver is controlled flow system flow entirety, containing the secondary combination brake switch and proporting of high speed selector valve, flow system flow is accurately controlled, and containing three grades of combination brake switch and proporting of proportional pressure control valve, system pressure is accurately controlled.
2. electric-hydraulic proportion circuit system according to claim 1, is characterized in that: the selector valve that is subject to the control of PLC controller in secondary combination brake switch and proporting is common selector valve or high speed selector valve.
3. electric-hydraulic proportion circuit system according to claim 2, is characterized in that: the relief valve in three grades of combination brake switch and proporting is common relief valve or proportional pressure control valve.
CN201410341288.9A 2014-07-18 2014-07-18 Electric-hydraulic proportion circuit system Active CN104121255B (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN201610163446.5A CN105697471A (en) 2014-07-18 2014-07-18 Control method of electro-hydraulic proportional loop system with good working effect
CN201610163451.6A CN105697462A (en) 2014-07-18 2014-07-18 Electro-hydraulic proportional loop system with good working effect
CN201610163447.XA CN105697472A (en) 2014-07-18 2014-07-18 Control method of electro-hydraulic proportional loop system capable of improving pressing performance effectively
CN201610163454.XA CN105697473A (en) 2014-07-18 2014-07-18 Electro-hydraulic proportional loop system with reasonable structure
CN201410341288.9A CN104121255B (en) 2014-07-18 2014-07-18 Electric-hydraulic proportion circuit system
CN201610163449.9A CN105805061A (en) 2014-07-18 2014-07-18 Control method of electro-hydraulic proportion loop system with reasonable structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410341288.9A CN104121255B (en) 2014-07-18 2014-07-18 Electric-hydraulic proportion circuit system

Related Child Applications (7)

Application Number Title Priority Date Filing Date
CN201610163444.6A Division CN105715629A (en) 2014-07-18 2014-07-18 Control method for electric-hydraulic proportional loop system reasonable in structure
CN201610163451.6A Division CN105697462A (en) 2014-07-18 2014-07-18 Electro-hydraulic proportional loop system with good working effect
CN201610163447.XA Division CN105697472A (en) 2014-07-18 2014-07-18 Control method of electro-hydraulic proportional loop system capable of improving pressing performance effectively
CN201610163454.XA Division CN105697473A (en) 2014-07-18 2014-07-18 Electro-hydraulic proportional loop system with reasonable structure
CN201610163446.5A Division CN105697471A (en) 2014-07-18 2014-07-18 Control method of electro-hydraulic proportional loop system with good working effect
CN201610163453.5A Division CN105782139A (en) 2014-07-18 2014-07-18 Electric-hydraulic proportional loop system capable of effectively improving pressing performance
CN201610163449.9A Division CN105805061A (en) 2014-07-18 2014-07-18 Control method of electro-hydraulic proportion loop system with reasonable structure

Publications (2)

Publication Number Publication Date
CN104121255A true CN104121255A (en) 2014-10-29
CN104121255B CN104121255B (en) 2016-08-17

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CN201610163454.XA Pending CN105697473A (en) 2014-07-18 2014-07-18 Electro-hydraulic proportional loop system with reasonable structure
CN201410341288.9A Active CN104121255B (en) 2014-07-18 2014-07-18 Electric-hydraulic proportion circuit system
CN201610163451.6A Pending CN105697462A (en) 2014-07-18 2014-07-18 Electro-hydraulic proportional loop system with good working effect
CN201610163449.9A Pending CN105805061A (en) 2014-07-18 2014-07-18 Control method of electro-hydraulic proportion loop system with reasonable structure
CN201610163446.5A Pending CN105697471A (en) 2014-07-18 2014-07-18 Control method of electro-hydraulic proportional loop system with good working effect
CN201610163447.XA Pending CN105697472A (en) 2014-07-18 2014-07-18 Control method of electro-hydraulic proportional loop system capable of improving pressing performance effectively

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Application Number Title Priority Date Filing Date
CN201610163451.6A Pending CN105697462A (en) 2014-07-18 2014-07-18 Electro-hydraulic proportional loop system with good working effect
CN201610163449.9A Pending CN105805061A (en) 2014-07-18 2014-07-18 Control method of electro-hydraulic proportion loop system with reasonable structure
CN201610163446.5A Pending CN105697471A (en) 2014-07-18 2014-07-18 Control method of electro-hydraulic proportional loop system with good working effect
CN201610163447.XA Pending CN105697472A (en) 2014-07-18 2014-07-18 Control method of electro-hydraulic proportional loop system capable of improving pressing performance effectively

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CN105736492A (en) * 2016-04-14 2016-07-06 刘湖南 Hydraulic oil cylinder and oil way system thereof
CN107642511A (en) * 2017-10-20 2018-01-30 河南科技大学 A kind of direct drive type electrohydraulic servo die hammer control system
CN110332180A (en) * 2019-08-16 2019-10-15 中冶赛迪工程技术股份有限公司 A kind of energy-saving type blast furnace hot-blast stove hydraulic control system and method
CN113864274A (en) * 2021-10-18 2021-12-31 山东泰丰智能控制股份有限公司 Lifting hydraulic control system

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CN103144304A (en) * 2013-02-05 2013-06-12 浙江大学 Plastic vibration processing and sample molding integration test equipment and method
CN103920839A (en) * 2014-01-14 2014-07-16 中南大学 Hybrid synchronous balance control system of large die-forging hydraulic press

Cited By (5)

* Cited by examiner, † Cited by third party
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CN105736492A (en) * 2016-04-14 2016-07-06 刘湖南 Hydraulic oil cylinder and oil way system thereof
CN107642511A (en) * 2017-10-20 2018-01-30 河南科技大学 A kind of direct drive type electrohydraulic servo die hammer control system
CN107642511B (en) * 2017-10-20 2024-01-19 河南科技大学 Direct-drive electrohydraulic servo die forging hammer control system
CN110332180A (en) * 2019-08-16 2019-10-15 中冶赛迪工程技术股份有限公司 A kind of energy-saving type blast furnace hot-blast stove hydraulic control system and method
CN113864274A (en) * 2021-10-18 2021-12-31 山东泰丰智能控制股份有限公司 Lifting hydraulic control system

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