CN106989073B - Electrohydraulic controlling mechanism - Google Patents
Electrohydraulic controlling mechanism Download PDFInfo
- Publication number
- CN106989073B CN106989073B CN201710292666.2A CN201710292666A CN106989073B CN 106989073 B CN106989073 B CN 106989073B CN 201710292666 A CN201710292666 A CN 201710292666A CN 106989073 B CN106989073 B CN 106989073B
- Authority
- CN
- China
- Prior art keywords
- variable pump
- accumulator
- control unit
- valve
- hydraulic oil
- 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.)
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- 230000007246 mechanism Effects 0.000 title claims abstract description 15
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 33
- 239000002828 fuel tank Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 7
- 238000004080 punching Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005183 dynamical system Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/26—Supply reservoir or sump assemblies
-
- 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
- F15B13/021—Valves for interconnecting the fluid chambers of an 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
- 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
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of electrohydraulic controlling mechanisms, comprising: hydraulic cylinder；Variable pump；Fuel tank；Control unit；Accumulator is used for when control unit is in the second position, and variable pump is connected to accumulator, and for when control unit is in the third place, accumulator and variable pump to be truncated, and accumulator is connected to rod chamber.When control unit is in the second position, the hydraulic oil in variable pump is through check valve respectively to rodless cavity and accumulator fliud flushing, and when control unit is in the third place, accumulator makes closed check valve, and the hydraulic oil in accumulator is to rod chamber filling liquid.The present invention controls accumulator by control unit and provides hydraulic oil for piston rod backhaul, and accumulator is capable of providing compared to variable pump more stably hydraulic oil, so that the backhaul of piston rod is more steady.
Description
Technical field
The present invention relates to mechanical electronic hydraulic control technology field more particularly to a kind of electrohydraulic controlling mechanism, particularly suitable control punching
Compressing cylinder.
Background technique
Hydraulic control system is the control system constructed using (quiet) hydraulic control and inverting element as major control element.Liquid
Voltage-controlled system is often referred to hydraulic control valve, hydraulic control pump etc. with inverting element.Hydraulic control technology is the one of automatic control technology
A important branch.Hydraulic control system distinct characteristics, it is with the obvious advantage, play irreplaceable role.Hydraulic control technology is allusion quotation
The mechanical-electrical-hydraulic integration technology of type is the example of multi-crossed disciplines fusion development.For example, electric hydraulic control system is with dynamics
System is object, is designed as means with degeneration factor, integrates mechanical system, electrical system and hydraulic system and constructs mechanical electronic hydraulic one
The dynamical system of body.Currently, hydraulic control technology is in equipment manufacture, auto industry, space flight and aviation, weapon industry, metallurgy
Industry, shipping industry, medical engineering etc. are multi-field to be applied.
For punching press oil cylinder, it is always desirable to which in punching course, punch rod (also referred to as piston rod) is with slower speed compared with favourable opposition
Forced feed, and after the completion of punching press, punch rod is capable of the backhaul of quick and stable, and guarantees that backhaul does not generate noise.And it is existing
In technology, the backhaul action multi-pass of punch rod crosses variable pump offer, so that the backhaul of the punch rod made is unstable, noise is larger,
To influence the service life of punching press oil cylinder.
Summary of the invention
For the above-mentioned technical problems in the prior art, the embodiment provides a kind of electrichydraulic control machines
Structure.
In order to solve the above technical problems, the embodiment of the present invention the technical solution adopted is that:
A kind of electrohydraulic controlling mechanism, comprising:
Hydraulic cylinder comprising the cylinder body with plunger shaft, is set to the work at the piston being set in the plunger shaft
Beyond the Great Wall and stretch out the cylinder body one end piston rod, the plunger shaft is divided into rod chamber and rodless cavity by the piston；
Variable pump is used to provide hydraulic oil for the hydraulic cylinder；
Fuel tank is used to provide hydraulic oil for the variable pump and for receiving hydraulic oil；
Control unit is set on the fluid pressure line between the variable pump and the hydraulic cylinder, and the control is single
Member has the first position that the rodless cavity and the variable pump and the rod chamber and the fuel tank is truncated, with making institute
It states variable pump to be connected to the rodless cavity, and the second position that is connected to the rod chamber with the fuel tank and makes the variable
Pump the third place for being connected to the rod chamber, and being connected to the rodless cavity with the fuel tank；
Accumulator is used for when described control unit is in the second position, and the variable pump is connected to the accumulator,
And for when described control unit be in the third place, the accumulator and the variable pump are truncated, and the accumulator and
The rod chamber connection.
Preferably, be provided with check valve between the variable pump and described control unit, the oil inlet of the check valve with
The variable pump connection, the oil outlet of the check valve are connect with described control unit, in which:
When described control unit is in the second position, the hydraulic oil in the variable pump is through the check valve respectively to institute
Rodless cavity and the accumulator fliud flushing are stated, and when described control unit is in the third place, the accumulator makes the list
It is closed to valve, the hydraulic oil in the accumulator is to the rod chamber filling liquid.
Preferably, switch valve is additionally provided between the variable pump and the fuel tank on fluid pressure line, the switch valve is set
It is placed between the check valve and the variable pump, wherein
When described control unit is in first position, the accumulator opens the switch valve, so that the change
Hydraulic oil in amount pump flows into the fuel tank.
Preferably, the switch valve be bi-bit bi-pass reversal valve, the bi-bit bi-pass reversal valve have make the variable pump
The truncation position being truncated with the fuel tank and the conducting position that the variable pump is connected with the fuel tank, at described control unit
When first position, the accumulator makes the switch valve from the truncation switching-on position in position.
Preferably, the bi-bit bi-pass reversal valve has control mouth, and the accumulator is connected to the control mouth, the storage
Hydraulic oil in energy device enters the control mouth so that the two position two-way valve switches to the conducting position from the truncation position.
Preferably, described control unit is three position four-way directional control valve.
Preferably, the both ends of the three position four-way directional control valve are provided with Electromagnetic Control mouth, and the two Electromagnetic Control mouths are used
Switch between its first position, the second position and the third place in controlling the three-position four-way valve.
Compared with prior art, the beneficial effect of electrohydraulic controlling mechanism of the invention is: the present invention passes through control unit control
Accumulator processed provides hydraulic oil for piston rod backhaul, and accumulator is capable of providing compared to variable pump more stably hydraulic oil, to make
The backhaul for obtaining piston rod is more steady.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the electrohydraulic controlling mechanism that the embodiment of the present invention provides.
In figure:
10- hydraulic cylinder；11- cylinder body；12- piston；13- rodless cavity；14- rod chamber；15- piston rod；20- variable pump；
30- control unit；40- accumulator；50- check valve；60- switch valve；70- fuel tank.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawing and specific embodiment party
Formula elaborates to the present invention.
As shown in Figure 1, being used for stamped workpieces, the electro-hydraulic control embodiment of the invention discloses a kind of electrohydraulic controlling mechanism
Mechanism processed includes: hydraulic cylinder 10, variable pump 20, fuel tank 70, control unit 30 and accumulator 40.Specifically, hydraulic cylinder
10 include the cylinder body 11 with 12 chamber of piston, is set to the intracavitary piston 12 of the piston 12, is set on the piston 12 simultaneously
The piston rod 15 of one end of the cylinder body 11 is stretched out, 12 chamber of piston is divided into rod chamber 14 and rodless cavity by the piston 12
13；Variable pump 20 is used to provide hydraulic oil for the hydraulic cylinder 10；Fuel tank 70 is used to provide hydraulic oil for the variable pump 20
With for receiving hydraulic oil；Control unit 30 is set to the fluid pressure line between the variable pump 20 and the hydraulic cylinder 10
On, described control unit 30, which has, keeps the rodless cavity 13 and the variable pump 20 and the rod chamber 14 and the fuel tank 70 equal
The first position of truncation has and is connected to the variable pump 20 with the rodless cavity 13, and makes the rod chamber 14 and the oil
Case 70 be connected to the second position and be connected to the variable pump 20 with the rod chamber 14, and make the rodless cavity 13 with it is described
The third place that fuel tank 70 is connected to；Accumulator 40 is used for the variable pump 20 when described control unit 30 is in the second position
It is connected to, and is used for when described control unit 30 is in the third place with the accumulator 40, the accumulator 40 and the change
20 truncation of amount pump, and the accumulator 40 is connected to the rod chamber 14.
In a preferred embodiment of the invention, it is provided between the variable pump 20 and described control unit 30 unidirectional
Valve 50, the oil inlet of the check valve 50 are connect with the variable pump 20, and the oil outlet of the check valve 50 and the control are single
Member 30 connects, in which:
When described control unit 30 is in the second position, the hydraulic oil in the variable pump 20 divides through the check valve 50
Not to 40 fliud flushing of the rodless cavity 13 and the accumulator, and when described control unit 30 is in the third place, the accumulation of energy
Device 40 closes the check valve 50, and the hydraulic oil in the accumulator 40 is to 14 filling liquid of rod chamber.
In a preferred embodiment of the invention, it is gone back on fluid pressure line between the variable pump 20 and the fuel tank 70
It is provided with switch valve 60, the switch valve 60 is set between the check valve 50 and the variable pump 20, wherein
When described control unit 30 is in first position, the accumulator 40 opens the switch valve 60, so that
Hydraulic oil in the variable pump 20 flows into the fuel tank 70.
As a kind of selection, the switch valve 60 be bi-bit bi-pass reversal valve, the bi-bit bi-pass reversal valve have make institute
It states the truncation position of variable pump 20 and the fuel tank 70 truncation and makes the conducting position of the variable pump 20 with the fuel tank 70 conducting,
When described control unit 30 is in first position, the accumulator 40 makes the switch valve 60 switching-on from truncation position
Position.
As a kind of selection, the bi-bit bi-pass reversal valve has control mouth, and the accumulator 40 connects with the control mouth
Logical, the hydraulic oil in the accumulator 40 enters the control mouth so that the two position two-way valve switches to institute from the truncation position
State conducting position.
As a kind of selection, described control unit 30 is three position four-way directional control valve.
As a kind of selection, the both ends of the three position four-way directional control valve are provided with Electromagnetic Control mouth, the two electromagnetism controls
Donsole switches between its first position, the second position and the third place for controlling the three-position four-way valve.
As described above, by Electromagnetic Control mouth be powered so that control unit 30 first position, the second position with
And it is switched between the third place.And when needing to stamp workpiece, control unit 30 is made to switch to the second position, variable pump 20
Interior hydraulic oil enters rodless cavity 13 by control unit 30, to push against piston 12 to drive piston rod 15 (punch rod) to stretch out
Hydraulic cylinder 10 is with stamped workpieces, and when control unit 30 switches to first position, rodless cavity 13 and rod chamber 14 are truncated,
Piston rod 15 is maintained at extended position, and the hydraulic oil in accumulator 40 is by control mouth access switch valve 60, so that switch
Valve 60 returns to fuel tank 70 from the hydraulic oil in the truncation switching-on position in position, variable pump 20, when control unit 30 switches to third
When position, check valve 50 is truncated by accumulator 40, and the hydraulic oil in accumulator 40 flows to rod chamber 14 makes 15 backhaul of piston rod.
The present invention controls accumulator 40 by control unit 30 and provides hydraulic oil for 15 backhaul of piston rod, and accumulator 40 can
It provides and compares the more stably hydraulic oil of variable pump 20, so that the backhaul of piston rod 15 is more steady.
Above embodiments are only exemplary embodiment of the present invention, are not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make respectively the present invention
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.
Claims (6)
1. a kind of electrohydraulic controlling mechanism characterized by comprising
Hydraulic cylinder comprising the cylinder body with plunger shaft, is set on the piston piston being set in the plunger shaft
And the piston rod of one end of the cylinder body is stretched out, the plunger shaft is divided into rod chamber and rodless cavity by the piston；
Variable pump is used to provide hydraulic oil for the hydraulic cylinder；
Fuel tank is used to provide hydraulic oil for the variable pump and for receiving hydraulic oil；
Control unit is set on the fluid pressure line between the variable pump and the hydraulic cylinder, described control unit tool
There is the first position that the rodless cavity and the variable pump and the rod chamber and the fuel tank is truncated, have and make the change
Amount pump is connected to the rodless cavity, and the second position that is connected to the rod chamber with the fuel tank and make the variable pump and
The rod chamber connection, and the third place for being connected to the rodless cavity with the fuel tank；
Accumulator is used for when described control unit is in the second position, and the variable pump is connected to the accumulator, and is used
In when described control unit is in the third place, the accumulator and the variable pump are truncated, and the accumulator with it is described
Rod chamber connection；
Check valve is provided between the variable pump and described control unit, the oil inlet of the check valve and the variable pump connect
It connects, the oil outlet of the check valve is connect with described control unit, in which:
When described control unit is in the second position, the hydraulic oil in the variable pump is through the check valve respectively to the nothing
Rod cavity and the accumulator filling liquid, and when described control unit is in the third place, the accumulator makes the check valve
It closes, the hydraulic oil in the accumulator is to the rod chamber filling liquid.
2. electrohydraulic controlling mechanism according to claim 1, which is characterized in that hydraulic between the variable pump and the fuel tank
Switch valve is additionally provided on pipeline, the switch valve is set to the variable pump oil return pipe between the check valve and the variable pump
On the road, wherein
When described control unit is in first position, the accumulator opens the switch valve, so that the variable pump
Interior hydraulic oil flows into the fuel tank.
3. electrohydraulic controlling mechanism according to claim 2, which is characterized in that the switch valve is bi-bit bi-pass reversal valve,
The bi-bit bi-pass reversal valve has the truncation position that the variable pump and the fuel tank is truncated and makes the variable pump and institute
State fuel tank conducting conducting position, when described control unit be in first position, the accumulator make the switch valve from section
The disconnected switching-on position in position.
4. electrohydraulic controlling mechanism according to claim 3, which is characterized in that the bi-bit bi-pass reversal valve has control
Mouthful, the accumulator is connected to the control mouth, and the hydraulic oil in the accumulator enters the control mouth so that described two
Two-port valve switches to the conducting position from the truncation position.
5. electrohydraulic controlling mechanism according to claim 1, which is characterized in that described control unit is 3-position 4-way commutation
Valve.
6. electrohydraulic controlling mechanism according to claim 5, which is characterized in that the both ends of the three position four-way directional control valve are all provided with
Be equipped with Electromagnetic Control mouth, the two Electromagnetic Control mouths for control the three-position four-way valve its first position, the second position with
And switch between the third place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710292666.2A CN106989073B (en) | 2017-04-28 | 2017-04-28 | Electrohydraulic controlling mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710292666.2A CN106989073B (en) | 2017-04-28 | 2017-04-28 | Electrohydraulic controlling mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106989073A CN106989073A (en) | 2017-07-28 |
| CN106989073B true CN106989073B (en) | 2019-08-23 |
Family
ID=59417103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710292666.2A Active CN106989073B (en) | 2017-04-28 | 2017-04-28 | Electrohydraulic controlling mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106989073B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999816B (en) * | 2018-10-16 | 2020-01-10 | 太原理工大学 | Linear driving system |
| CN109131547B (en) * | 2018-10-29 | 2020-09-18 | 北京航天发射技术研究所 | Integrated electro-hydraulic steering actuating unit and control method |
| 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 |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201669568U (en) * | 2010-05-19 | 2010-12-15 | 西安邮电学院 | Hydraulic energy-accumulation pressure maintaining system for fixture |
| CN201836129U (en) * | 2010-07-09 | 2011-05-18 | 上海朝田实业有限公司 | Quick pressure lifting device for accumulator on hydraulic pump station |
| CN202229980U (en) * | 2011-09-28 | 2012-05-23 | 北京索普液压机电有限公司 | Hydraulic pressurizing system of testing machine |
| CN202690347U (en) * | 2012-05-30 | 2013-01-23 | 三一重工股份有限公司 | Concrete pump swinging cylinder hydraulic system and concrete pumping device |
| CN103603833A (en) * | 2013-11-14 | 2014-02-26 | 何扬东 | Constant pressure oil circuit control device |
| CN203627345U (en) * | 2013-11-06 | 2014-06-04 | 嘉兴杰顺工业设计有限公司 | Pressure maintaining circuit provided with energy accumulator |
| CN203627344U (en) * | 2013-11-06 | 2014-06-04 | 嘉兴杰顺工业设计有限公司 | Cylinder circuit provided with energy accumulator |
| CN104314894A (en) * | 2014-09-18 | 2015-01-28 | 芜湖高昌液压机电技术有限公司 | Pressure relay type unloading loop for scissor lift |
| CN106378915A (en) * | 2016-10-31 | 2017-02-08 | 成都源云机械有限公司 | Hydraulic control system of high-speed injection molding machine |
-
2017
- 2017-04-28 CN CN201710292666.2A patent/CN106989073B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201669568U (en) * | 2010-05-19 | 2010-12-15 | 西安邮电学院 | Hydraulic energy-accumulation pressure maintaining system for fixture |
| CN201836129U (en) * | 2010-07-09 | 2011-05-18 | 上海朝田实业有限公司 | Quick pressure lifting device for accumulator on hydraulic pump station |
| CN202229980U (en) * | 2011-09-28 | 2012-05-23 | 北京索普液压机电有限公司 | Hydraulic pressurizing system of testing machine |
| CN202690347U (en) * | 2012-05-30 | 2013-01-23 | 三一重工股份有限公司 | Concrete pump swinging cylinder hydraulic system and concrete pumping device |
| CN203627345U (en) * | 2013-11-06 | 2014-06-04 | 嘉兴杰顺工业设计有限公司 | Pressure maintaining circuit provided with energy accumulator |
| CN203627344U (en) * | 2013-11-06 | 2014-06-04 | 嘉兴杰顺工业设计有限公司 | Cylinder circuit provided with energy accumulator |
| CN103603833A (en) * | 2013-11-14 | 2014-02-26 | 何扬东 | Constant pressure oil circuit control device |
| CN104314894A (en) * | 2014-09-18 | 2015-01-28 | 芜湖高昌液压机电技术有限公司 | Pressure relay type unloading loop for scissor lift |
| CN106378915A (en) * | 2016-10-31 | 2017-02-08 | 成都源云机械有限公司 | Hydraulic control system of high-speed injection molding machine |
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| Publication number | Publication date |
|---|---|
| CN106989073A (en) | 2017-07-28 |
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