CN107091253A - A kind of hydraulic pressure performs equipment - Google Patents
A kind of hydraulic pressure performs equipment Download PDFInfo
- Publication number
- CN107091253A CN107091253A CN201710516820.XA CN201710516820A CN107091253A CN 107091253 A CN107091253 A CN 107091253A CN 201710516820 A CN201710516820 A CN 201710516820A CN 107091253 A CN107091253 A CN 107091253A
- Authority
- CN
- China
- Prior art keywords
- oil
- valve
- hydraulic
- digital valve
- oil 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.)
- Pending
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B2013/0412—Valve members; Fluid interconnections therefor with three positions
Abstract
Equipment is performed the invention discloses a kind of hydraulic pressure, power set, the oil cylinder acted for execution and the digital valve for passing through step motor control including the oil pump for pressure oil output, for driving oil pump, the delivery outlet of oil pump connects the oil inlet of digital valve, the oil-out of digital valve connects the oil return opening of oil pump, and the actuator port of digital valve connects the rod chamber of oil cylinder.Digital valve passes through step motor control, and then control pressure oil enters the rod chamber or rodless cavity of oil cylinder, action executing is realized, digital valve eliminates most of Hydraulic Elements using exquisite design, simplify structure, and precision height, fast response time, positioning precision have reached micron level.The oil-out of digital valve directly connects the oil return opening of oil pump simultaneously, forms Closed Hydraulic structure, effectively reduces volume and oil consumption, cost-effective.
Description
Technical field
The present invention relates to field of hydraulic equipment, more particularly to a kind of hydraulic pressure performs equipment.
Background technology
Hydraulic pressure performs equipment and is widely used in multiple fields, generally comprises oil pump, power set and oil cylinder, power set are defeated
Go out rotating speed driving oil pump, export hydraulic oil, driving oil cylinder performs action, but existing hydraulic pressure is performed in equipment, and oil pump is rotated
Inertia is big, system low-response, is not suitable for high frequency occasion, and speed and position control accuracy be not high, petrol station and oil cylinder split, petrol station
Vibration and noise are excessive, smaller and higher to the noise and vibration demand occasion in unsuitable space, while hydraulic oil is needed except system
Outside the flow asked, other return to fuel tank by other means, cause waste.
Therefore, how to provide that a kind of to respond that fast, precision is high, noise is small and reduce the hydraulic pressure of oil consumption to perform equipment be this area
The current technical issues that need to address of technical staff.
The content of the invention
Equipment is performed it is an object of the invention to provide a kind of hydraulic pressure, response is fast, precision is high, noise is small and reduces oil consumption.
In order to solve the above technical problems, the present invention, which provides a kind of hydraulic pressure, performs equipment, including the oil for pressure oil output
Pump, the power set for driving the oil pump, the oil cylinder acted for execution and the digital valve by step motor control, institute
Spring is set with outside the external part for the piston rod for stating oil cylinder, the piston rod of the oil cylinder can be released the oil cylinder by the spring
3, the delivery outlet of the oil pump connects the oil inlet of the digital valve, and the oil-out of the digital valve connects the oil return of the oil pump
Mouthful, the actuator port of the digital valve connects the rod chamber of the oil cylinder；The digital valve be in the first working position when, it is described enter
Hydraulic fluid port connects the actuator port；When the digital valve is in the second working position, the oil-out connects the actuator port；Institute
When stating digital valve in three working positions, the oil inlet and the oil-out completely cut off the actuator port.
Preferably, digital valve is specially hydraulic efficiency servo-valve or proportional control valve.
Preferably, the digital valve includes valve body, the stepper motor, leading screw and follow move pilot valve, and the valve body is installed on
The rear end of the oil cylinder, the leading screw is installed in the valve body, and one end of the leading screw connects the stepper motor, described
The other end connection feedback feed screw nut of leading screw, and stretch into the piston rod of the oil cylinder, the feedback feed screw nut is installed on
The piston of the oil cylinder and with the piston rotation, the leading screw is fixedly connected and drives the follow move pilot valve, the servo-actuated cunning
Valve can move to change the hydraulic fluid port of the digital valve connection in the valve body.
Preferably, the oil cylinder rod end is provided with the displacement transducer for detecting the piston rod overhang.
Preferably, institute's displacement sensors are specially linear variable difference transformer.
Preferably, in addition to hydraulic control two-pass cartridge valve and control valve, two actuator ports of the hydraulic control two-pass cartridge valve
The rod chamber and the oil return opening of the oil cylinder are respectively communicated with, two actuator ports of the control valve are respectively communicated with the output
The control port of mouth and the hydraulic control two-pass cartridge valve.
Preferably, the equipped at outlet port is provided with overflow valve and oil filter.
Preferably, the equipped at outlet port is provided with the pressure transmitter for detecting system pressure, and controller being capable of basis
System pressure controls the output speed of the power set.
Preferably, accumulator, the delivery outlet and institute are communicated with the oil circuit between the delivery outlet and the oil inlet
State and check valve is provided between accumulator, the check valve allows hydraulic oil to flow to the oil inlet by the delivery outlet.
Preferably, the oil pump is specially constant displacement pump, and the power set are specially servomotor.
The present invention provides a kind of hydraulic pressure and performs equipment, including oil pump for pressure oil output, for driving the dynamic of oil pump
Power apparatus, the oil cylinder acted for execution and the digital valve by step motor control, the external part overcoat of the piston rod of oil cylinder
Equipped with spring, spring can retract the piston rod of oil cylinder oil cylinder, and the delivery outlet of oil pump connects the oil inlet of digital valve, digital valve
Oil-out connect the oil return opening of oil pump, the actuator port of digital valve connects the rod chamber of oil cylinder；Digital valve is in the first work
During position, oil inlet connection actuator port；When digital valve is in the second working position, oil-out connection actuator port；Digital valve is in
During three working positions, oil inlet and oil-out completely cut off the first actuator port.
Digital valve is by step motor control, and then control pressure oil enters the rod chamber or rodless cavity of oil cylinder, realizes dynamic
Perform, digital valve eliminates most of Hydraulic Elements using exquisite design, simplify structure, and precision height, fast response time,
Positioning precision has reached micron level.The oil-out of digital valve directly connects the oil return opening of oil pump simultaneously, forms Closed Hydraulic
Structure, effectively reduces volume and oil consumption, cost-effective.
Brief description of the drawings
Fig. 1 is a kind of hydraulic schematic diagram for embodiment that hydraulic pressure provided by the present invention performs equipment；
Fig. 2 be hydraulic pressure provided by the present invention perform equipment a kind of embodiment in oil cylinder and digital valve structure
Schematic diagram.
Embodiment
The core of the present invention is to provide a kind of hydraulic pressure and performs equipment, and response is fast, precision is high, noise is small and reduces oil consumption.
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Fig. 1 and Fig. 2 are refer to, Fig. 1 is a kind of liquid for embodiment that hydraulic pressure provided by the present invention performs equipment
Press schematic diagram；Fig. 2 is oil cylinder and the knot of digital valve in a kind of embodiment of hydraulic pressure provided by the present invention execution equipment
Structure schematic diagram.
The specific embodiment of the invention provides a kind of hydraulic pressure and performs equipment, including oil pump 1, power set 2, the sum of oil cylinder 3
Word valve 4, oil pump 1 is used for pressure oil output, and power set 2 are used to drive oil pump 1, and oil pump 1 is specially constant displacement pump, power set 2
Specially servomotor, can also use other devices certainly.Spring, spring energy are set with outside the external part of the piston rod of oil cylinder 3
Enough piston rod ejection cylinders 3 by oil cylinder 3.
Oil pump 2 has delivery outlet and oil return opening, and delivery outlet output hydraulic oil, low pressure oil flows back to oil pump 2 by oil return opening, number
Word valve 4 has oil inlet, oil-out and actuator port, and digital valve 4 is controlled by stepper motor 42, digital valve 4 is in first
Working position, the second working position and the 3rd working position.The delivery outlet of oil pump 1 connects the oil inlet of digital valve 4, digital valve 4 it is fuel-displaced
The oil return opening of mouth connection oil pump 1, the actuator port of digital valve 4 connects the rod chamber of oil cylinder 3.
When digital valve 4 is in the first working position, oil inlet connection actuator port, i.e. hydraulic oil is entered by oil inlet bar
Low pressure oil in chamber, rodless cavity is flowed out by pipeline, and piston rod 31 is retracted, and spring is compressed；Digital valve 4 is in the second working position
When, oil-out connection actuator port, under the action of the spring, piston rod 31 stretches out, i.e., hydraulic oil enters rodless cavity by pipeline, has
Hydraulic oil in rod cavity flows back to oil return opening by oil-out,；When digital valve 4 is in three working positions, oil inlet and oil-out isolation
Actuator port, hydraulic oil does not flow, and piston rod 31 is motionless.
Digital valve 4 is controlled by stepper motor 42, and then control pressure oil enters the rod chamber or rodless cavity of oil cylinder 3, real
Existing action executing, digital valve 4 eliminates most of Hydraulic Elements using exquisite design, simplifies structure, and precision is high, response speed
Degree is fast, positioning precision has reached micron level.The oil-out of digital valve 4 directly connects the oil return opening of oil pump simultaneously, forms and closes
Formula hydraulic structure, effectively reduces volume and oil consumption, cost-effective.
Specifically, digital valve 4 can be hydraulic efficiency servo-valve or proportional control valve.Digital valve 4 includes valve body 41, stepper motor
42nd, leading screw 43 and follow move pilot valve 44, valve body 41 are installed on the rear end of oil cylinder 3, and leading screw 43 is installed in valve body 41, leading screw 43
One end connects stepper motor 42, the other end connection feedback feed screw nut 33 of leading screw 43, and stretches into the piston rod 31 of oil cylinder 3,
Feedback feed screw nut 33 is installed on the piston 32 of oil cylinder 3 and rotated with piston 32, and leading screw 43 is fixedly connected and drives follow move pilot valve
44, follow move pilot valve 44 can move to change the hydraulic fluid port of the connection of digital valve 4 in valve body 41.
The given position control signal of controller is acted directly on stepper motor 42, and stepper motor 1 starts band moving gear
Rotation, and then the rotary motion of leading screw 43 is driven, because follow move pilot valve 44 is connected with leading screw 43, follow move pilot valve 44 can be driven to move,
The convex shoulder of follow move pilot valve 44 is produced after displacement, can connect the different hydraulic fluid ports of digital valve 4, and then hydraulic oil is entered oil cylinder 3
Different cavitys.Follow move pilot valve 44 is separated out multiple inner chambers in valve body 41, and different inner chambers connect different hydraulic fluid ports, realize work
The switching of position.
Hydraulic oil can promote piston 32 to move, and then feedback feed screw nut 33 can be driven to rotate, and feedback feed screw nut 33 is again
The opposite direction of leading screw 43 and follow move pilot valve 44 toward the script moving direction of piston 32 can be driven to move, so as to reduce oil inlet and work
Make the cross-sectional sizes of hydraulic fluid port, reduce the speed for the hydraulic oil for entering oil cylinder 3, oil cylinder 3 is in a new poised state again, directly
Realize position negative-feedback.
In the hydraulic pressure that the specific embodiment of the invention is provided performs equipment, the rod end of oil cylinder 3 is provided with for detecting work
The displacement transducer 34 of the overhang of stopper rod 31.Specifically, it can be linear variable difference transformer.Realize the overhang of oil cylinder 3
Accurate control and monitoring in real time, improve equipment accuracy.
In order to improve security, in addition to hydraulic control two-pass cartridge valve 5 and control valve 6, two works of hydraulic control two-pass cartridge valve 5
The rod chamber and oil return opening of oil cylinder 3 are respectively communicated with as hydraulic fluid port, two actuator ports of control valve 6 are respectively communicated with delivery outlet and hydraulic control
The control port of two-way plug-in valve 5.Under normal condition, control valve 6 is turned on, and hydraulic oil gets enter into hydraulic control two-pass cartridge valve 5
Control port, makes 5 two actuator port isolations of hydraulic control two-pass cartridge valve, it is to avoid the hydraulic oil of rod chamber is by hydraulic control two-pass cartridge valve
5 outflows, when under abnormality, control valve 6 is closed, hydraulic oil does not enter back into the control port of hydraulic control two-pass cartridge valve 5, makes
Two actuator ports connection of hydraulic control two-pass cartridge valve 5, the hydraulic oil of rod chamber can be flowed out by hydraulic control two-pass cartridge valve 5,
Realize pressure release.Control valve 6 can be two-position two-way solenoid valve, when two-position two-way solenoid valve is in the first working position, hydraulic oil warp
Control port is entered by two-position two-way solenoid valve, when in the second working position, the hydraulic oil oil-feed in hydraulic control two-pass cartridge valve 5
Two-position two-way solenoid valve flows back to oil return opening.
In order to improve device security and stability, also overflow valve 7 and oil filter 8 can be set in equipped at outlet port.
On the basis of the hydraulic pressure that above-mentioned each embodiment is provided performs equipment, equipped at outlet port is provided with for detecting
The pressure transmitter 9 of system pressure, controller can control the output speed of power set 2 according to system pressure.System pressure
Controller is passed to by two pressure transmitters 9, when system pressure reaches setting pressure, servomotor then keeps extremely low and turned
Speed or stalling, when pressure drops to safe pressure value, rotating speed increase, system pressure also increases.Accurate control is realized, and energy-conservation subtracts
Row.
Accumulator 10 is communicated with oil circuit that can also be between delivery outlet and oil inlet, between delivery outlet and accumulator 10
Check valve 11 is provided with, check valve 11 allows hydraulic oil to flow to oil inlet by delivery outlet.During servomotor high-speed driving, part is high
Force feed is stored into accumulator 10, during servomotor driven at low speed, system oil consumption is compensated by accumulator 10, check valve 11
It can prevent the hydraulic oil that accumulator 10 is exported from flowing to the delivery outlet of oil pump 1.Ensure equipment stable operation, while volume also can be set
Less recharging oil device.
Equipment is performed to hydraulic pressure provided by the present invention above to be described in detail.Specific case pair used herein
The principle and embodiment of the present invention is set forth, and the explanation of above example is only intended to the method for helping to understand the present invention
And its core concept.It should be pointed out that for those skilled in the art, before the principle of the invention is not departed from
Put, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into the guarantor of the claims in the present invention
In the range of shield.
Claims (10)
1. a kind of hydraulic pressure performs equipment, it is characterised in that including the oil pump (1) for pressure oil output, for driving the oil
The power set (2) of pump (1), the oil cylinder (3) acted for execution and the digital valve (4) controlled by stepper motor (42), institute
Spring is set with outside the external part for the piston rod for stating oil cylinder (3), the piston rod of the oil cylinder (3) can be released institute by the spring
Oil cylinder (3) is stated, the delivery outlet of the oil pump (1) connects the oil inlet of the digital valve (4), the oil-out of the digital valve (4)
The oil return opening of the oil pump (1) is connected, the actuator port of the digital valve (4) connects the rod chamber of the oil cylinder (3)；The number
When word valve (4) is in the first working position, the oil inlet connects the actuator port；The digital valve (4) is in the second work
During position, the oil-out connects the actuator port；When the digital valve (4) is in three working positions, the oil inlet and institute
State oil-out and completely cut off the actuator port.
2. hydraulic pressure according to claim 1 performs equipment, it is characterised in that digital valve (4) be specially hydraulic efficiency servo-valve or
Proportional control valve.
3. hydraulic pressure according to claim 2 performs equipment, it is characterised in that the digital valve (4) includes valve body (41), institute
Stepper motor (42), leading screw (43) and follow move pilot valve (44) are stated, the valve body (41) is installed on the rear end of the oil cylinder (3),
The leading screw (43) is installed in the valve body (41), and one end of the leading screw (43) connects the stepper motor (42), described
The other end connection feedback feed screw nut (33) of leading screw (43), and stretch into the piston rod (31) of the oil cylinder (3), the feedback
Feed screw nut (33) is installed on the piston (32) of the oil cylinder (3) and rotated with the piston (32), and the leading screw (43) is fixed
Connect and drive the follow move pilot valve (44), the follow move pilot valve (44) can move described to change in the valve body (41)
The hydraulic fluid port of digital valve (4) connection.
4. hydraulic pressure according to claim 3 performs equipment, it is characterised in that rod end is provided with the oil cylinder (3) is used for
Detect the displacement transducer (34) of the piston rod (31) overhang.
5. hydraulic pressure according to claim 4 performs equipment, it is characterised in that institute's displacement sensors (34) are specially linear
Variable differential transformer.
6. hydraulic pressure according to claim 1 performs equipment, it is characterised in that also including hydraulic control two-pass cartridge valve (5) and control
Valve (6) processed, two actuator ports of the hydraulic control two-pass cartridge valve (5) are respectively communicated with the rod chamber of the oil cylinder (3) and described
Oil return opening, two actuator ports of the control valve (6) are respectively communicated with the delivery outlet and the hydraulic control two-pass cartridge valve (5)
Control port.
7. hydraulic pressure according to claim 1 performs equipment, it is characterised in that the equipped at outlet port is provided with overflow valve (7)
With oil filter (8).
8. the hydraulic pressure according to claim 1 to 7 any one performs equipment, it is characterised in that the equipped at outlet port is set
There is the pressure transmitter (9) for detecting system pressure, controller can control the power set (2) according to system pressure
Output speed.
9. hydraulic pressure according to claim 8 performs equipment, it is characterised in that between the delivery outlet and the oil inlet
Accumulator (10) is communicated with oil circuit, check valve (11), the list are provided between the delivery outlet and the accumulator (10)
Hydraulic oil is allowed to flow to the oil inlet by the delivery outlet to valve (11).
10. hydraulic pressure according to claim 9 performs equipment, it is characterised in that the oil pump (1) is specially constant displacement pump, institute
It is specially servomotor to state power set (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710516820.XA CN107091253A (en) | 2017-06-29 | 2017-06-29 | A kind of hydraulic pressure performs equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710516820.XA CN107091253A (en) | 2017-06-29 | 2017-06-29 | A kind of hydraulic pressure performs equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107091253A true CN107091253A (en) | 2017-08-25 |
Family
ID=59641103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710516820.XA Pending CN107091253A (en) | 2017-06-29 | 2017-06-29 | A kind of hydraulic pressure performs equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107091253A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386401A (en) * | 2018-04-17 | 2018-08-10 | 迪斯油压工业(昆山)有限公司 | Hydraulic press quick response system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051612A (en) * | 1989-11-08 | 1991-05-22 | 中国科学院沈阳自动化研究所 | A kind of high-speed hydraulic servo cylinder |
| CN101839258A (en) * | 2009-03-18 | 2010-09-22 | 宋家骏 | Servo hydraulic transmission mechanism |
| CN102226453A (en) * | 2011-06-22 | 2011-10-26 | 太原理工大学 | Dual-redundancy electro hydraulic servo actuator |
| US20130192217A1 (en) * | 2011-05-31 | 2013-08-01 | Future Hydraulics LLC | Hydraulic drive |
| CN103644155A (en) * | 2013-12-17 | 2014-03-19 | 上海电气电站设备有限公司 | Hydraulic actuator |
| CN104976188A (en) * | 2015-06-03 | 2015-10-14 | 中联重科股份有限公司 | Actuator assembly, engineering machine and boom control device and method of engineering machine |
| CN207093478U (en) * | 2017-06-29 | 2018-03-13 | 杭州和利时自动化有限公司 | A kind of hydraulic pressure performs equipment |
-
2017
- 2017-06-29 CN CN201710516820.XA patent/CN107091253A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051612A (en) * | 1989-11-08 | 1991-05-22 | 中国科学院沈阳自动化研究所 | A kind of high-speed hydraulic servo cylinder |
| CN101839258A (en) * | 2009-03-18 | 2010-09-22 | 宋家骏 | Servo hydraulic transmission mechanism |
| US20130192217A1 (en) * | 2011-05-31 | 2013-08-01 | Future Hydraulics LLC | Hydraulic drive |
| CN102226453A (en) * | 2011-06-22 | 2011-10-26 | 太原理工大学 | Dual-redundancy electro hydraulic servo actuator |
| CN103644155A (en) * | 2013-12-17 | 2014-03-19 | 上海电气电站设备有限公司 | Hydraulic actuator |
| CN104976188A (en) * | 2015-06-03 | 2015-10-14 | 中联重科股份有限公司 | Actuator assembly, engineering machine and boom control device and method of engineering machine |
| CN207093478U (en) * | 2017-06-29 | 2018-03-13 | 杭州和利时自动化有限公司 | A kind of hydraulic pressure performs equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386401A (en) * | 2018-04-17 | 2018-08-10 | 迪斯油压工业(昆山)有限公司 | Hydraulic press quick response system |
| CN108386401B (en) * | 2018-04-17 | 2023-11-28 | 迪斯油压工业(昆山)有限公司 | Quick response system of oil press |
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| PB01 | Publication | ||
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Application publication date: 20170825 |