CN106584914A - Pressure applying equipment - Google Patents
Pressure applying equipment Download PDFInfo
- Publication number
- CN106584914A CN106584914A CN201611119630.6A CN201611119630A CN106584914A CN 106584914 A CN106584914 A CN 106584914A CN 201611119630 A CN201611119630 A CN 201611119630A CN 106584914 A CN106584914 A CN 106584914A
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- China
- Prior art keywords
- pressure
- valve
- hydraulic cylinder
- oil
- application devices
- 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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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/161—Control arrangements for fluid-driven presses controlling the ram speed and ram pressure, e.g. fast approach speed at low pressure, low pressing speed at high pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/18—Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram
- B30B15/20—Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram controlling the speed of the ram, e.g. the speed of the approach, pressing or return strokes
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or 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
- 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
-
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses pressure applying equipment which comprises a compressing hydraulic cylinder (1), a high-position oil supply oil tank (2), a hydraulic oil pump (3), a prefill valve (4), a proportional valve (5) and a check valve (6). The oil conveying end of the hydraulic oil pump (3) unidirectionally communicates with an inlet of the proportional valve (5) through the check valve (6). An outlet of the proportional valve (5) communicates with an oil cavity of the compressing hydraulic cylinder (1) through a first stop type direction valve (7). The telescopic end of the compressing hydraulic cylinder (1) is provided with a pressing head (8) to apply pressure. The high-position oil supply oil tank (2) communicates with the oil cavity of the compressing hydraulic cylinder (1) through the prefill valve (4). According to the scheme, the problems that due to the fact that existing pressure applying equipment charges high-pressure oil liquid through a hydraulic oil pump in a high-pressure compressing state, pressure regulating precision is low, and pressure regulation is inconvenient can be solved.
Description
Technical field
The present invention relates to press device technical field, more particularly to a kind of pressure application devices.
Background technology
In metallurgical technology field, pressure application devices are typically used in the occasion for needing to apply larger pressure, and pressure is applied
The pressure head of oil (gas) filling device is driven by compressing hydraulic cylinder, compresses hydraulic cylinder extension energy drive ram to apply pressure.But, in reality
In the production process on border, compressing hydraulic cylinder needs to apply larger pressure, and its cylinder diameter is larger, in order to realize compressing hydraulic cylinder
Quick-expansion, typically using top petrol tank by replenishing valve quickly to compressing the quick topping up of hydraulic cylinder, and then realize compressing liquid
The quick-expansion of cylinder pressure, is then filled with high-voltage oil liquid using using hydraulic oil pump into compression hydraulic cylinder, and then realizes compressing liquid
The high pressure of cylinder pressure is compressed.
In the actual course of work, hydraulic oil pump to compress be filled with hydraulic cylinder high-voltage oil liquid exist regulation precision compared with
It is low, the inconvenient problem of pressure regulation, and then be easily caused that compression hydraulic cylinder works are unstable, the final pressure effect for affecting pressure head.
It can be seen that, how to solve current pressure application devices and high-voltage oil liquid is filled with by hydraulic oil pump in high pressure impaction state
There is a problem of that regulation precision is relatively low, pressure regulation is inconvenient.
The content of the invention
In view of this, the present invention discloses a kind of pressure application devices, to solve current pressure application devices in high pressure pressure
Tight state is filled with the problem that regulation precision is relatively low, pressure regulation is inconvenient of high-voltage oil liquid presence by hydraulic oil pump.
To solve above-mentioned technical problem, the present invention is disclosed directly below technical scheme：
Pressure application devices, including compress hydraulic cylinder, high-order supply reservoir, hydraulic oil pump, replenishing valve, proportioning valve and unidirectional
Valve；Wherein：
The oil transportation end of the hydraulic oil pump passes through the entrance unilaterally connected of the check valve and the proportioning valve；The ratio
The outlet of valve is realized connecting or ending with the oil pocket of the compression hydraulic cylinder by the first cut-off type direction valve；The compression hydraulic pressure
The telescopic end of cylinder is provided with pressure head to apply pressure；
The high-order supply reservoir is connected by the replenishing valve with the oil pocket of the compression hydraulic cylinder.
Preferably, in above-mentioned pressure application devices, relief line is provided between the hydraulic oil pump and the check valve,
The relief line includes overflow valve and overflow fuel tank；Wherein：
The entrance point of the overflow valve is connected between the hydraulic oil pump and the check valve, the port of export and the overflow
Fuel tank is connected.
Preferably, in above-mentioned pressure application devices, the overflow valve is electromagnetic relief valve.
Preferably, in above-mentioned pressure application devices, the oil return pipeline of the pressure application devices includes oil return fuel tank and the
Two cut-off type direction valves；Wherein：
Realize connecting by the second cut-off type direction valve between the oil pocket and the oil return fuel tank for compressing hydraulic cylinder
Logical or cut-off.
Preferably, in above-mentioned pressure application devices, also including first pressure sensor, second pressure sensor and control mould
Block；Wherein：
The first pressure sensor is connected between the oil transportation end of the hydraulic oil pump and the check valve, for detecting
First pressure；The second pressure sensor is connected between the compression hydraulic cylinder and the outlet of the proportioning valve, for examining
Second pressure is surveyed, the control module is connected with the first pressure sensor and the second pressure sensor, for root
The proportionality coefficient of the proportioning valve is adjusted according to the first pressure and the second pressure.
Preferably, in above-mentioned pressure application devices, also including two movable press head hydraulic cylinders, two movable press head liquid
Cylinder pressure is separately positioned on the both sides of the compression hydraulic cylinder, the telescopic end of the movable press head hydraulic cylinder and pressure head phase therewith
Corresponding end connection.
Preferably, in above-mentioned pressure application devices, two movable press head hydraulic cylinders are symmetrically arranged at the compression
The both sides of hydraulic cylinder.
Pressure application devices disclosed by the invention have the advantages that：
During work, high-order supply reservoir is by replenishing valve to compression liquid for pressure application devices disclosed by the invention
Hydraulic oil is quickly filled with the oil pocket of cylinder pressure, and then the telescopic end for compressing hydraulic cylinder is quickly stretched out, and then cause pressure head fast
Speed is attached on stressed member, is then turned on hydraulic oil pump, and the electric magnet of the first cut-off type direction valve obtains electric, the first cut-off type direction
State of the valve in its two ends oil circuit is connected, hydraulic oil pump orders about high-voltage oil liquid and sequentially passes through check valve, proportioning valve and first section
Only formula direction valve is entered in the oil pocket for compressing hydraulic cylinder so that the telescopic end band dynamic head high pressure for compressing hydraulic cylinder compresses forced section
Part, after force is completed, the fluid compressed in the oil pocket of hydraulic cylinder realizes oil return by its oil return pipeline.It is disclosed by the invention
The decompression of pressure application devices energy passing ratio valve is adjusted realizes that the high pressure to compressing hydraulic cylinder is compressed, fine due to proportioning valve
Regulation can enable the compaction pressure for compressing hydraulic cylinder accurately to be adjusted, and no pressure dead band, pressure regulation is also more convenient.Can
See, pressure application devices disclosed by the invention can solve current pressure application devices and pass through hydraulic oil pump in high pressure impaction state
It is filled with the problem that regulation precision is relatively low, pressure regulation is inconvenient of high-voltage oil liquid presence.
Description of the drawings
For the technical scheme in being illustrated more clearly that the embodiment of the present invention or background technology, below will be to embodiment or the back of the body
The accompanying drawing to be used needed for the description of scape technology is briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is a kind of structural representation of pressure application devices provided in an embodiment of the present invention；
Fig. 2 is another kind of structural representation of pressure application devices provided in an embodiment of the present invention.
Description of reference numerals：
1- compresses hydraulic cylinder, 2- high position supply reservoirs, 3- hydraulic oil pumps, 4- replenishing valves, 5- proportioning valves, 6- check valves, 7-
First cut-off type direction valve, 8- pressure heads, 9- electromagnetic relief valves, 10- overflow fuel tanks, 11- oil return fuel tanks, the cut-off type sides of 12- second
To valve, 13- first pressure sensors, 14- second pressure sensors, 15- movable press head hydraulic cylinders, 16- control modules.
Specific embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with of the invention real
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described enforcement
Example a part of embodiment only of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, this area is general
The every other embodiment that logical technical staff is obtained under the premise of creative work is not made, should all belong to guarantor of the present invention
The scope of shield.
Fig. 1 is refer to, the embodiment of the present invention discloses a kind of pressure application devices, and disclosed pressure application devices include pressure
Tight hydraulic cylinder 1, high-order supply reservoir 2, hydraulic oil pump 3, replenishing valve 4, proportioning valve 5 and check valve 6.
Wherein, hydraulic oil pump 3 is hydraulic oil conveying equipment, and the oil transportation end of hydraulic oil pump 3 is by check valve 6 and proportioning valve 5
Entrance unilaterally connected, the fluid of the oil transportation end output of hydraulic oil pump 3 after check valve 6 can the entrance of passing ratio valve 5 enter
In entering proportioning valve 5.
The outlet of proportioning valve 5 is connected by the first cut-off type direction valve 7 with the oil pocket for compressing hydraulic cylinder 1, compresses hydraulic cylinder 1
Telescopic end be provided with pressure head 8 to apply pressure, during work, compress hydraulic cylinder 1 telescopic end promote pressure head 8 stretch out
And then stressed member is compressed, finally realize the applying of pressure.As shown in figure 1, the first cut-off type direction valve 7 is electromagnetic type direction
Valve, under the electric magnet Y2 "on" positions of the first cut-off type direction valve 7, the first cut-off type direction valve 7 is in its two ends oil circuit of connection
Connected state, when under electric magnet Y2 off-positions, connection of the first cut-off type direction valve 7 in its two ends oil circuit is blocked.
High-order supply reservoir 2 is connected by replenishing valve 4 with the oil pocket for compressing hydraulic cylinder 1, so as to realize to compression hydraulic cylinder 1
Oil pocket in it is quick oil-filled, and then realize that the telescopic end for compressing hydraulic cylinder 1 quickly stretches out, pressure head 8 is contacted in stress
On part.
During work, high-order supply reservoir 2 passes through replenishing valve 4 to pressure application devices disclosed in the embodiment of the present invention
Hydraulic oil is quickly filled with into the oil pocket for compressing hydraulic cylinder 1, and then the telescopic end for compressing hydraulic cylinder 1 is quickly stretched out, and then
So that pressure head 8 is quickly attached on stressed member, hydraulic oil pump 3 is then turned on, the electric magnet Y2 of the first cut-off type direction valve 7 is obtained
Electricity, state of the first cut-off type direction valve 7 in its two ends oil circuit is connected, hydraulic oil pump 3 orders about high-voltage oil liquid and sequentially passes through list
Enter in the oil pocket for compressing hydraulic cylinder 1 to valve 6,5 and first cut-off type direction valve of proportioning valve 7 so that compress the flexible of hydraulic cylinder 1
End band dynamic head 8 high pressure compresses stressed member, after force is completed, compresses the fluid in the oil pocket of hydraulic cylinder 1 by its time
Oil pipeline realizes oil return.The decompression of pressure application devices energy passing ratio valve 5 disclosed in the embodiment of the present invention is adjusted to be realized to pressure
The high pressure of tight hydraulic cylinder 1 is compressed, because the compaction pressure that can enable to compress hydraulic cylinder 1 that fine-tunes of proportioning valve 5 is obtained
Accurate to adjust, no pressure dead band, pressure regulation is also more convenient.It can be seen that, the embodiment of the present invention can solve current pressure and apply to set
It is standby to be filled with that the precision that high-voltage oil liquid is present is relatively low, pressure regulation is inconvenient asks to it into by hydraulic oil pump in high pressure impaction state
Topic.
Referring again to Fig. 1, relief line can also be set, relief line includes overflowing between hydraulic oil pump 3 and check valve 6
Stream valve and overflow fuel tank 10, the entrance point of overflow valve is connected between hydraulic oil pump 3 and check valve 6, the port of export and overflow fuel tank
10 connections.Specifically, overflow valve can be electromagnetic relief valve 9.In the specific course of work, it drives after hydraulic oil pump 3 starts
Dynamic fluid flows to check valve 6, and the electric magnet Y1 of electromagnetic relief valve 9 is powered, and the relief line that electromagnetic relief valve 9 is controlled is in
Off-state.Certainly, after the completion of the work of hydraulic cylinder 1 is compressed, the electric magnet Y1 of electromagnetic relief valve 9 with power-off, and then can be opened
Relief line so that the fluid that hydraulic oil pump 3 drives is drained by relief line.
Pressure application devices disclosed in the present embodiment can also include oil return pipeline, and oil return pipeline can include oil return fuel tank
11 and the second cut-off type direction valve 12, the second cut-off type direction valve 12 is connected to the oil pocket and oil return fuel tank 11 for compressing hydraulic cylinder 1
Between, compressing hydraulic cylinder 1 and complete after pressure applies with dynamic head 8, the hydraulic oil compressed in the oil pocket of hydraulic cylinder 1 can be by the
Two cut-off type direction valves 12 are back in oil return fuel tank 11, and under oil return state, the electric magnet Y4 of the second cut-off type direction valve 12 breaks
Electricity, the connection of the second cut-off type direction valve 12 compresses the oil pocket and oil return fuel tank 11 of hydraulic cylinder 1, now, the first cut-off type direction valve 7
Electric magnet Y2 power-off, in cut-off state.Certainly, during pressure applying, the electric magnet of the first cut-off type direction valve 7
Y2 power-off, the electric magnet Y4 of the second cut-off type direction valve 12 is powered, and then causes the first cut-off type direction valve 7 and the second cut-off type
Direction valve 12 is in off-state.Pressure application devices disclosed in the embodiment of the present application adopt the He of the first cut-off type direction valve 7
Second cut-off type direction valve 12 control compress hydraulic cylinder 1 pressure release, have the advantages that it is simple, reliable, without impact.Meanwhile, adopt
First cut-off type direction valve 7 and the second cut-off type direction valve 12 are not in leakage problem during implementing pressurize, and pressurize is imitated
Fruit is preferably.The electric magnet Y4 of the electric magnet Y2 of the first cut-off type direction valve 7 and the second cut-off type direction valve 12 is used cooperatively, can be more
Effectively, the operations such as boosting compression, pressure release release, the pressurize of compression hydraulic cylinder 1 are more easily completed.
Refer to accompanying drawing 2, pressure application devices disclosed in the embodiment of the present invention can also include first pressure sensor 13,
Second pressure sensor 14 and control module 16.First pressure sensor 13 is connected to the oil transportation end of hydraulic oil pump 3 and check valve 6
Between, for detecting first pressure.Second pressure sensor 14 is connected between compression hydraulic cylinder 1 and the outlet of proportioning valve 5, is used
In detection second pressure.Control module is connected with first pressure sensor 13 and second pressure sensor 14, for according to
One pressure and second pressure adjust the proportionality coefficient of proportioning valve 5.By first pressure sensor 13 and second pressure sensor 14
Testing result adjusting the proportionality coefficient of proportioning valve 5.Meanwhile, the inspection of first pressure sensor 13 and second pressure sensor 14
Surveying result can be transmitted to main operation room with analog quantity, and the value of first pressure and second pressure is included in main menu
On, it is easy to operator in the proportionality coefficient of the indoor regulation proportioning valve 5 of main manipulation, reach pressure controlled purpose.
Fig. 1 and 2 is refer to, in order to realize quickly to topping up force feed in the inner chamber for compressing hydraulic cylinder 1, and then realizes compressing
The telescopic end of hydraulic cylinder 1 quickly stretches out, it is preferred that pressure application devices disclosed in the present embodiment can also include that two pressure heads are moved
Hydrodynamic cylinder pressure 15, two movable press head hydraulic cylinders 15 are separately positioned on the both sides for compressing hydraulic cylinder 1, movable press head hydraulic cylinder 15
Telescopic end is connected with the corresponding end of pressure head 8.During topping up, movable press head hydraulic cylinder 15 can drive ram 8
Quickly stretch out, and then the telescopic end for compressing hydraulic cylinder 1 is applied thrust and is directly moved with pressure head 8, in such cases,
Hydraulic oil can realize that pressure head 8 quickly stretches out quickly full of hydraulic cylinder 1 is compressed, while can improve oily to hydraulic cylinder 1 is compressed
The efficiency of intracavity topping up.Compression hydraulic cylinder 1 is larger by the pressure that pressure head 8 applies, therefore compresses being relatively large in diameter for hydraulic cylinder 1,
Above-mentioned two movable press head hydraulic cylinder 15 can improve the stability of the movement of pressure head 8.Preferably, two movable press head hydraulic cylinders 15 pairs
It is arranged in the both sides for compressing hydraulic cylinder 1 with claiming, more can balancedly promotes the movement of pressure head 8, and plays fast retractile pressure
8 effect.
Herein, only emphasis describes different with other schemes to each preferred version, as long as each preferred version
Do not conflict, can combination in any, the embodiment formed after combination is also within category disclosed in this specification, it is contemplated that
Text is succinct, herein with regard to no longer individually being described to combining formed embodiment.
The above is only the specific embodiment of the present invention, is made skilled artisans appreciate that or realizing this
It is bright.Various modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (7)
1. pressure application devices, it is characterised in that including compress hydraulic cylinder (1), high-order supply reservoir (2), hydraulic oil pump (3),
Replenishing valve (4), proportioning valve (5) and check valve (6)；Wherein：
The oil transportation end of the hydraulic oil pump (3) passes through the entrance unilaterally connected of the check valve (6) and the proportioning valve (5)；Institute
State the outlet of proportioning valve (5) to realize connecting or cut by the first cut-off type direction valve (7) with the oil pocket of compression hydraulic cylinder (1)
Only；The telescopic end for compressing hydraulic cylinder (1) is provided with pressure head (8) to apply pressure；
The high-order supply reservoir (2) is connected by the replenishing valve (4) with the oil pocket of compression hydraulic cylinder (1).
2. pressure application devices according to claim 1, it is characterised in that the hydraulic oil pump (3) and the check valve
(6) relief line is provided between, the relief line includes overflow valve and overflow fuel tank (10)；Wherein：
The entrance point of the overflow valve is connected between the hydraulic oil pump (3) and the check valve (6), and the port of export overflows with described
Stream fuel tank (10) connection.
3. pressure application devices according to claim 2, it is characterised in that the overflow valve is electromagnetic relief valve (9).
4. pressure application devices according to claim 1, it is characterised in that the oil return pipeline bag of the pressure application devices
Include oil return fuel tank (11) and the second cut-off type direction valve (12)；Wherein：
Pass through the second cut-off type direction valve (12) between the oil pocket for compressing hydraulic cylinder (1) and the oil return fuel tank (11)
Realize connection or end.
5. pressure application devices according to claim 1, it is characterised in that also including first pressure sensor (13),
Two pressure transducers (14) and control module；Wherein：
The first pressure sensor (13) is connected between the oil transportation end of the hydraulic oil pump (3) and the check valve (6), is used
In detection first pressure；The second pressure sensor (14) is connected to compression hydraulic cylinder (1) and the proportioning valve (5)
Between outlet, for detecting second pressure, the control module and the first pressure sensor (13) and the second pressure
Sensor (14) is connected, for adjusting the ratio system of the proportioning valve (5) according to the first pressure and the second pressure
Number.
6. according to arbitrary described pressure application devices in claim 1-5, it is characterised in that also including two movable press head liquid
Cylinder pressure (15), two movable press head hydraulic cylinders (15) are separately positioned on the both sides of compression hydraulic cylinder (1), the pressure head
The telescopic end of mobile hydraulic cylinder (15) is connected with the corresponding end of the pressure head (8).
7. pressure application devices according to claim 6, it is characterised in that two movable press head hydraulic cylinders (15) are right
It is arranged in the both sides of compression hydraulic cylinder (1) with claiming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611119630.6A CN106584914B (en) | 2016-12-08 | 2016-12-08 | Pressure application devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611119630.6A CN106584914B (en) | 2016-12-08 | 2016-12-08 | Pressure application devices |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106584914A true CN106584914A (en) | 2017-04-26 |
| CN106584914B CN106584914B (en) | 2019-03-15 |
Family
ID=58595267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611119630.6A Active CN106584914B (en) | 2016-12-08 | 2016-12-08 | Pressure application devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106584914B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201645883U (en) * | 2009-12-22 | 2010-11-24 | 武汉景宏工贸有限公司 | Proportional supercharging control circuit used for hydraulic system of press |
| JP2011208790A (en) * | 2010-03-30 | 2011-10-20 | Toshiba Mach Co Ltd | Control method of hydraulic pump and construction machine using the control method |
| CN202500840U (en) * | 2012-03-27 | 2012-10-24 | 九江东升科技开发有限公司 | Electrohydraulic actuating mechanism with servo proportioning valve |
| CN202811580U (en) * | 2012-09-26 | 2013-03-20 | 珠海华粤离合器有限公司 | Pressure servo controller of oil press |
| JP2013095531A (en) * | 2011-10-28 | 2013-05-20 | Toyota Industries Corp | Lifting device |
-
2016
- 2016-12-08 CN CN201611119630.6A patent/CN106584914B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201645883U (en) * | 2009-12-22 | 2010-11-24 | 武汉景宏工贸有限公司 | Proportional supercharging control circuit used for hydraulic system of press |
| JP2011208790A (en) * | 2010-03-30 | 2011-10-20 | Toshiba Mach Co Ltd | Control method of hydraulic pump and construction machine using the control method |
| JP2013095531A (en) * | 2011-10-28 | 2013-05-20 | Toyota Industries Corp | Lifting device |
| CN202500840U (en) * | 2012-03-27 | 2012-10-24 | 九江东升科技开发有限公司 | Electrohydraulic actuating mechanism with servo proportioning valve |
| CN202811580U (en) * | 2012-09-26 | 2013-03-20 | 珠海华粤离合器有限公司 | Pressure servo controller of oil press |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106584914B (en) | 2019-03-15 |
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