CN109099018A - A kind of Multifunction shuttle conveyer energy-saving hydraulic control system - Google Patents

A kind of Multifunction shuttle conveyer energy-saving hydraulic control system Download PDF

Info

Publication number
CN109099018A
CN109099018A CN201811136629.3A CN201811136629A CN109099018A CN 109099018 A CN109099018 A CN 109099018A CN 201811136629 A CN201811136629 A CN 201811136629A CN 109099018 A CN109099018 A CN 109099018A
Authority
CN
China
Prior art keywords
valve
way electromagnetic
connect
oil
electromagnetic directional
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.)
Pending
Application number
CN201811136629.3A
Other languages
Chinese (zh)
Inventor
王勇
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.)
Sichuan Desen Valve Manufacturing Co Ltd
Original Assignee
Sichuan Desen Valve Manufacturing 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 Sichuan Desen Valve Manufacturing Co Ltd filed Critical Sichuan Desen Valve Manufacturing Co Ltd
Priority to CN201811136629.3A priority Critical patent/CN109099018A/en
Publication of CN109099018A publication Critical patent/CN109099018A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F15B1/024Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
    • 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
    • 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
    • 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
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04Special measures taken in connection with the properties of the fluid
    • F15B21/041Removal or measurement of solid or liquid contamination, e.g. filtering
    • 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
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/14Energy-recuperation means
    • 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
    • F15B2013/0448Actuation by solenoid and permanent magnet
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/20Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205Systems with pumps
    • F15B2211/2053Type of pump
    • F15B2211/20546Type of pump variable capacity
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/20Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/50Pressure control
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/60Circuit components or control therefor
    • F15B2211/615Filtering means
    • 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
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/80Other types of control related to particular problems or conditions
    • F15B2211/88Control measures for saving energy

Abstract

The present invention relates to Multifunction shuttle conveyer technical fields, more particularly to a kind of Multifunction shuttle conveyer energy-saving hydraulic control system, including oil groove, first check valve, second one-way valve, third check valve, variable pump, three-position four-way electromagnetic directional valve, hydraulic cylinder, two position, three-way electromagnetic change valve, speed governing valve, accumulator, first two-position two-way electromagnetic directional valve, second two-position two-way electromagnetic directional valve, pilot operated electromagnetic relief valve and direct-acting overflow valve, while this system uses accumulator as energy-storage travelling wave tube recycling and reusing gravitional force, for the different operating condition of turnover mechanism raising and lowering in Multifunction shuttle conveyer, also take the mode to hydraulic system second voltage regulation, it can make hydraulic system under different operating conditions to work under different maximum working pressures, improve the working efficiency of the system, reduce energy consumption.

Description

A kind of Multifunction shuttle conveyer energy-saving hydraulic control system
Technical field
The present invention relates to Multifunction shuttle conveyer technical fields, and in particular to a kind of Multifunction shuttle conveyer energy-conserving hydraulic control system System.
Background technique
Multifunction shuttle conveyer is one important link of automotive painting line, has important shadow to painting dressing automobiles quality, painting cost It rings, but uses the Multifunction shuttle conveyer of hydraulic-driven at present, hydraulic control system efficiency is generally lower, and how to reduce energy consumption is Emphasis considers the problems of when designing hydraulic system.
Summary of the invention
The technical problem to be solved in the present invention, the present invention provides a kind of Multifunction shuttle conveyers for having energy recovery function Energy-saving hydraulic control system.
The technical solution adopted by the present invention are as follows: a kind of Multifunction shuttle conveyer energy-saving hydraulic control system, including oil groove, first Check valve, second one-way valve, third check valve, variable pump, three-position four-way electromagnetic directional valve, hydraulic cylinder, two-position three-way electromagnetic change It overflows to valve, speed governing valve, accumulator, the first two-position two-way electromagnetic directional valve, the second two-position two-way electromagnetic directional valve, guide type electromagnetic Stream valve and direct-acting overflow valve, the oil inlet of first check valve connect with oil groove, the oil outlet of first check valve and The oil inlet of variable pump connects, and the oil outlet of the variable pump and the P mouth of three-position four-way electromagnetic directional valve connect, and described three four The A mouth of electric change valve is connect with the rod chamber of hydraulic cylinder, the rodless cavity and two position, three-way electromagnetic change valve of the hydraulic cylinder The connection of A1 mouth, the T1 mouth of the two position, three-way electromagnetic change valve connect with the B of three-position four-way electromagnetic directional valve mouth, described three The T mouth of four-way electromagnetic reversing valve is connect with oil groove, and the P1 mouth of the two position, three-way electromagnetic change valve is single by speed governing valve and second It is connected to the oil inlet of valve, the oil outlet of the second one-way valve is connect with accumulator, the first bi-bit bi-pass electromagnetic switch One hydraulic fluid port of valve is connect with accumulator, and another hydraulic fluid port is connect with the oil inlet of third check valve, the third check valve it is fuel-displaced Mouth is connect with the oil inlet of variable pump, and the oil inlet of the pilot operated electromagnetic relief valve and the oil outlet of variable pump connect, described The oil outlet of pilot operated electromagnetic relief valve is connect with oil groove, the pilot control hydraulic fluid port of the pilot operated electromagnetic relief valve and the two or two The hydraulic fluid port connection of two electric change valves of position, another hydraulic fluid port of second two-position two-way electromagnetic directional valve and Direct Action Type overflow The oil inlet of valve connects, and the oil outlet of the direct-acting overflow valve is connect with oil groove.
A kind of Multifunction shuttle conveyer energy-saving hydraulic control system as described above, further illustrates to be that the accumulator is adopted Use bladder accumulator.
A kind of Multifunction shuttle conveyer energy-saving hydraulic control system as described above further illustrates to be that described first is unidirectional The oil inlet of valve is equipped with oil strainer.
The beneficial effects of the present invention are: this system is using accumulator as the same of energy-storage travelling wave tube recycling and reusing gravitional force When, for the different operating condition of turnover mechanism raising and lowering in Multifunction shuttle conveyer, also take to hydraulic system second voltage regulation Mode can make hydraulic system, to work under different maximum working pressures, improve the work of the system under different operating conditions Efficiency reduces energy consumption.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
In figure: 1, oil groove;2, the first check valve;3, second one-way valve;4, third check valve;5, variable pump;6, three four Electric change valve;7, hydraulic cylinder;8, two position, three-way electromagnetic change valve;9, speed governing valve;10, accumulator;11, the first bi-bit bi-pass Solenoid directional control valve;12, the second two-position two-way electromagnetic directional valve;13, pilot operated electromagnetic relief valve;14, direct-acting overflow valve;15, Oil strainer.
Specific embodiment
Embodiment of the present invention is further elaborated with reference to the accompanying drawing.
As shown in Figure 1, a kind of Multifunction shuttle conveyer energy-saving hydraulic control system provided in this embodiment, including oil groove 1, One check valve 2, second one-way valve 3, third check valve 4, variable pump 5, three-position four-way electromagnetic directional valve 6, hydraulic cylinder 7, two three Electric change valve 8, speed governing valve 9, accumulator 10, the first two-position two-way electromagnetic directional valve 11, the second bi-bit bi-pass electromagnetic switch Valve 12, pilot operated electromagnetic relief valve 13 and direct-acting overflow valve 14.
The oil inlet of first check valve 2 is connect with oil groove 1, oil outlet and the variable pump 5 of first check valve 2 Oil inlet connection, so that variable pump 5 be made to carry out oil suction from oil groove 1, preferably, can first check valve 2 into Hydraulic fluid port is equipped with oil strainer 15, can be filtered to the oil liquid of the system of progress by setting oil strainer 15, to make oil liquid more Add cleaning.
The oil outlet of the variable pump 5 is connect with the P of three-position four-way electromagnetic directional valve 6 mouth, and the 3-position 4-way electromagnetism changes It is connect to the A mouth of valve 6 with the rod chamber of hydraulic cylinder 7, the rodless cavity of the hydraulic cylinder 7 and the A1 of two position, three-way electromagnetic change valve 8 Mouth connection, the T1 mouth of the two position, three-way electromagnetic change valve 8 are connect with the B of three-position four-way electromagnetic directional valve 6 mouth, and described three four The T mouth of electric change valve 6 is connect with oil groove 1, and the P1 mouth of the two position, three-way electromagnetic change valve 8 passes through speed governing valve 9 and second The oil inlet of check valve 3 connects, and the oil outlet of the second one-way valve 3 is connect with accumulator 10, the first bi-bit bi-pass electricity One hydraulic fluid port of magnetic reversal valve 11 is connect with accumulator 10, and another hydraulic fluid port is connect with the oil inlet of third check valve 4, the third list It is connect to the oil outlet of valve 4 with the oil inlet of variable pump 5, to pass through the recycling of the complete pairing energy of accumulator 10, hereafter It will elaborate.
The oil inlet of the pilot operated electromagnetic relief valve 13 is connect with the oil outlet of variable pump 5, and the guide type electromagnetic overflows The oil outlet of stream valve 13 is connect with oil groove 1, the pilot control hydraulic fluid port and the second bi-bit bi-pass of the pilot operated electromagnetic relief valve 13 One hydraulic fluid port of solenoid directional control valve 12 connects, another hydraulic fluid port and direct-acting overflow valve of second two-position two-way electromagnetic directional valve 12 14 oil inlet connection, the oil outlet of the direct-acting overflow valve 14 is connect with oil groove 1, to pass through pilot operated electromagnetic relief valve 13 and direct-acting overflow valve 14 complete pressure regulation operation, be specifically described below.
Working principle of the present invention are as follows: Multifunction shuttle conveyer operating condition is mainly by turnover mechanism decline stage and ascent stage group At;
The turnover mechanism decline stage: in the decline stage, hydraulic system carries out the gravitional force of turnover mechanism at this time Recycling, since turnover mechanism self weight is bigger, the decline of turnover mechanism can substantially decline by self weight completely, and hydraulic pump 5 is right Hydraulic cylinder 7 only helps out, and the second two-position two-way electromagnetic directional valve 12 is located at left station, pilot operated electromagnetic relief valve 13 at this time Control mouth connects direct-acting overflow valve 14, and the maximum working pressure of hydraulic system is set by direct-acting overflow valve 14, hydraulic system Work is under low pressure.Turnover mechanism under the effect of gravity, drives 7 piston rod of hydraulic cylinder retraction, the hydraulic oil warp that variable pump 5 exports Three-position four-way electromagnetic directional valve 6 enters in the rod chamber of hydraulic cylinder 7, and the oil liquid of 7 rodless cavity of hydraulic cylinder is through two-position three way electricity at this time Enter in accumulator 10 after magnetic reversal valve 8, speed governing valve 9 and second one-way valve 3, so that the gravitional force of turnover mechanism is changed into liquid Pressure energy is stored in accumulator 10, and three-position four-way electromagnetic directional valve 6 is located at left station at this time, and two position, three-way electromagnetic change valve 8 In left station, the first two-position two-way electromagnetic directional valve 11 is located at right working position.
Turnover mechanism ascent stage: turnover mechanism self weight is bigger, and turnover mechanism acts on the power of hydraulic cylinder 7 all by liquid The counteracted by pressure that press pump 5 provides, thus at this time at hydraulic system under high pressure, the second two-position two-way electromagnetic directional valve 12 at this time In right working position, 13 control mouth of pilot operated electromagnetic relief valve is closed, and the maximum pressure of hydraulic system is by pilot operated electromagnetic relief valve 13 Setting.7 piston rod of hydraulic cylinder stretches out at this time, and the oil liquid that variable pump 5 exports is through three-position four-way electromagnetic directional valve 6, two-position three way electricity Enter in the rodless cavity of hydraulic cylinder 7 after magnetic reversal valve 8, so that piston rod be made to stretch out, completes the lifting operations of turnover mechanism, at this time The first two-position two-way electromagnetic directional valve 11 is set to be located at left station, the oil inlet of the oil liquid entering variable pump 5 of accumulator 10, to drop The low outlet of variable pump and the pressure difference of entrance, therefore reduce the purpose of energy consumption.
The present invention is not limited to examples detailed above, in claims of the present invention limited range, art technology The various deformations or amendments that personnel can make without creative work are protected by this patent.

Claims (3)

1. a kind of Multifunction shuttle conveyer energy-saving hydraulic control system, it is characterised in that: including oil groove, the first check valve, the second list To valve, third check valve, variable pump, three-position four-way electromagnetic directional valve, hydraulic cylinder, two position, three-way electromagnetic change valve, speed governing valve, storage Energy device, the first two-position two-way electromagnetic directional valve, the second two-position two-way electromagnetic directional valve, pilot operated electromagnetic relief valve and Direct Action Type are overflow Valve is flowed, the oil inlet of first check valve is connect with oil groove, the oil outlet of first check valve and the oil inlet of variable pump Connection, the oil outlet of the variable pump and the P mouth of three-position four-way electromagnetic directional valve connect, the three-position four-way electromagnetic directional valve A mouthfuls connect with the rod chamber of hydraulic cylinder, and the rodless cavity of the hydraulic cylinder and the A1 mouth of two position, three-way electromagnetic change valve connect, described The T1 mouth of two position, three-way electromagnetic change valve is connect with the B of three-position four-way electromagnetic directional valve mouth, the three-position four-way electromagnetic directional valve T mouth connect with oil groove, the P1 mouth of the two position, three-way electromagnetic change valve is connected by speed governing valve and the oil inlet of second one-way valve It connects, the oil outlet of the second one-way valve is connect with accumulator, the hydraulic fluid port and storage of first two-position two-way electromagnetic directional valve Can device connection, another hydraulic fluid port connect with the oil inlet of third check valve, the oil outlet of the third check valve and variable pump into Hydraulic fluid port connection, the oil inlet of the pilot operated electromagnetic relief valve and the oil outlet of variable pump connect, the guide type electromagnetic overflow The oil outlet of valve is connect with oil groove, the pilot control hydraulic fluid port of the pilot operated electromagnetic relief valve and the second bi-bit bi-pass electromagnetic switch One hydraulic fluid port of valve connects, and another hydraulic fluid port of second two-position two-way electromagnetic directional valve and the oil inlet of direct-acting overflow valve connect It connects, the oil outlet of the direct-acting overflow valve is connect with oil groove.
2. a kind of Multifunction shuttle conveyer energy-saving hydraulic control system according to claim 1, it is characterised in that: the accumulation of energy Device uses bladder accumulator.
3. a kind of Multifunction shuttle conveyer energy-saving hydraulic control system according to claim 1, it is characterised in that: described first The oil inlet of check valve is equipped with oil strainer.
CN201811136629.3A 2018-09-27 2018-09-27 A kind of Multifunction shuttle conveyer energy-saving hydraulic control system Pending CN109099018A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811136629.3A CN109099018A (en) 2018-09-27 2018-09-27 A kind of Multifunction shuttle conveyer energy-saving hydraulic control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811136629.3A CN109099018A (en) 2018-09-27 2018-09-27 A kind of Multifunction shuttle conveyer energy-saving hydraulic control system

Publications (1)

Publication Number Publication Date
CN109099018A true CN109099018A (en) 2018-12-28

Family

ID=64867514

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811136629.3A Pending CN109099018A (en) 2018-09-27 2018-09-27 A kind of Multifunction shuttle conveyer energy-saving hydraulic control system

Country Status (1)

Country Link
CN (1) CN109099018A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110255460A (en) * 2019-07-07 2019-09-20 中科聚信洁能热锻装备研发股份有限公司 A kind of fluid power system and its control method of weight roll-over table
CN110454446A (en) * 2019-08-15 2019-11-15 中国商用飞机有限责任公司 Aircraft hydraulic pumps oil suction pressure charging system
CN110778537A (en) * 2019-11-05 2020-02-11 宁波路佳机械科技有限公司 Energy-saving hydraulic station
CN110820673A (en) * 2019-11-12 2020-02-21 武汉纺织大学 A accurate controllable formula water level floodgate of lifting height for river model

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110255460A (en) * 2019-07-07 2019-09-20 中科聚信洁能热锻装备研发股份有限公司 A kind of fluid power system and its control method of weight roll-over table
CN110454446A (en) * 2019-08-15 2019-11-15 中国商用飞机有限责任公司 Aircraft hydraulic pumps oil suction pressure charging system
CN110778537A (en) * 2019-11-05 2020-02-11 宁波路佳机械科技有限公司 Energy-saving hydraulic station
CN110820673A (en) * 2019-11-12 2020-02-21 武汉纺织大学 A accurate controllable formula water level floodgate of lifting height for river model

Similar Documents

Publication Publication Date Title
CN105156391B (en) A kind of composite variable pump and the hydraulic control system with composite variable pump
CN102874697B (en) Hydraulic system for controlling amplitude variation of arm support and crane
CN202827716U (en) Steering electro-hydraulic control system for remote-control loader
CN103047208B (en) Load-sensitive electro-hydraulic proportional multi-way valve
CN104033154B (en) The TBM propulsion hydraulic system of double mode switching
CN202064326U (en) Synchronous split hydraulic hoist
CN103174688A (en) Hydraulic energy-saving system
CN106015135B (en) A kind of energy-saving pair of execution unit hydraulic press system and control method
CN205136180U (en) Hydraulic system of big indisputable fill compression dustbin compression material loading simultaneous working
CN103626057B (en) Hoisting crane and hydraulic efficiency pressure system thereof
CN203111003U (en) Converging oil supply system of hinged type dumper lifting hydraulic system
CN201581382U (en) Electro-hydraulic proportional control piston type two-lifting-point hydraulic hoist
CN105545853B (en) Extension and contraction control valve, multi-stage expansion hydraulic system and arm of derrick stretch hydraulic control system
CN101532518B (en) Concrete pump truck pumping double-main oil cylinder automatic high-low pressure switching and equidirectional telescoping hydraulic device
CN104948538B (en) The servo hydraulic system and its construction method of a kind of plate bending machine
WO2011023028A1 (en) High and low dual-speed pressurizing system for rotary drilling rig
CN204284032U (en) Single actuator automatic switchover rapid movement oil hydraulic circuit
CN202170901U (en) Main valve bank device of pumped type concrete wet sprayer for coal mine
CN104863914B (en) A kind of electro-hydraulic joint control converging valve
CN106402060B (en) Directly driven volume controlled electro-hydraulic servo hydraulic system of hydraulic machine
CN102887447B (en) Hydraulic control loop for amplitude-variable hydraulic cylinder, crane and amplitude-variable control method
CN202833008U (en) Concrete pump and hydraulic system thereof
CN103842663A (en) Control system for operating work device for construction machine
CN203114764U (en) Load-sensitive electro-hydraulic proportional multi-way valve
CN101775822A (en) Excavator swing arm descending hydraulic control loop

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication