CN110332160A - A kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control - Google Patents
A kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control Download PDFInfo
- Publication number
- CN110332160A CN110332160A CN201910534689.9A CN201910534689A CN110332160A CN 110332160 A CN110332160 A CN 110332160A CN 201910534689 A CN201910534689 A CN 201910534689A CN 110332160 A CN110332160 A CN 110332160A
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- Prior art keywords
- exit
- solenoid valve
- valve
- electro
- system based
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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
- 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
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/255—Flow control functions
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
The electro-hydraulic servo hydraulic control system based on Serve Motor Control that the invention discloses a kind of, belong to hydraulic system field, a kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control, including fuel tank, the exit of the fuel tank is fixedly installed with high-pressure oil pump by pipeline, the exit of the high-pressure oil pump is fixedly connected with high pressure oil inlet pipe, there is the first solenoid valve at the other end end of the high pressure oil inlet pipe by Pipe installing, the rodless cavity entrance of oil cylinder is fixedly connected at first electromagnetic valve outlet by the first high-pressure rubber pipe, the inlet of first solenoid valve is parallel with throttle grverning valve by pipeline, the exit of the throttle grverning valve is connected with second solenoid valve by pipeline, the exit of the second solenoid valve is parallel to the exit of the first solenoid valve, the security and stability used can be greatly improved in this way, guarantee skill The high efficiency of energy environmental protection.
Description
Technical field
The present invention relates to hydraulic system fields, more specifically to a kind of electro-hydraulic servo based on Serve Motor Control
Hydraulic control system.
Background technique
Electro-hydraulic servo universal testing machine has the developing history of decades at home.Nowadays the testing machine hydraulic control system
System mostly uses common threephase asynchronous to drive high-pressure oil pump, then passes through control electrohydraulic servo valve or electric-hydraulic proportion valve core
The size of amount of opening controls the flow of hydraulic circuit, to control the movement speed of oil cylinder piston.
But existing electric industry servo-system come with some shortcomings when in use place, such as electrohydraulic servo valve price compared with
Height, it is lower that electro-hydraulic proportional valve controls precision, and uses three-phase normal asynchronous, and motor is in full speed running state always
Under, hydraulic oil source is more demanding to cooling system, and otherwise oil temperature is easy to overtemperature alarm, meanwhile, threephase asynchronous is lasting
Operating, for long-time pressure-retaining system, oil cylinder piston produces the supply demand very little of high pressure liquid pressure oil, oil sources oil pump at this time
Raw most of high pressure liquid pressure oil directly passes through electromagnetic relief valve and flows back to fuel tank, does not participate in direct experimental use, noise
Also bigger, most of waste of electric energy is caused in this way, while being also fixedly mounted at tank surface to add, gear installation water
When Pingdu is poor, the vertical degree of liquidometer can not be adjusted, is easy to cause degree error larger because of being in tilted layout, is unfavorable for making
With
Summary of the invention
1. technical problems to be solved
Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a kind of electricity based on Serve Motor Control
Liquid servo hydraulic control system controls by using servo motor revolving speed, therefore no longer needs servo valve or proportioning valve, to save
Expensive servo valve, at the same it is very low to the required precision of whole system oil sources oil filter, using servo motor revolving speed control
The flow of liquefaction pump, hence for the test for requiring lasting pressure maintaining, the revolving speed of servo motor can be at low speed, and hair is effectively reduced
Hot and cold but demand, noise is smaller, energy conservation and environmental protection, while installing liquidometer by the union of rotation connection, in conjunction with arc
Plate and arc pressuring plate are positioned, and adjustable setting angle guarantees verticality, can greatly improve the safety used in this way
Stability guarantees the high efficiency of technical ability environmental protection.
2. technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control, including fuel tank, the exit of the fuel tank
It is fixedly installed with high-pressure oil pump by pipeline, the exit of the high-pressure oil pump is fixedly connected with high pressure oil inlet pipe, the high pressure
There is the first solenoid valve at the other end end of oil inlet pipe by Pipe installing, passes through the first high-pressure rubber pipe at first electromagnetic valve outlet
It is fixedly connected on the rodless cavity entrance of oil cylinder, the inlet of first solenoid valve is parallel with throttle grverning valve, institute by pipeline
The exit for stating throttle grverning valve is connected with second solenoid valve by pipeline, and the exit of the second solenoid valve is parallel to first
The exit of solenoid valve, the rod chamber inlet of the oil cylinder are fixedly installed with the second high-pressure rubber pipe, second high-pressure rubber pipe
Separately have but be in series with third solenoid valve and the 4th solenoid valve, the exit of the 4th solenoid valve is fixedly installed with control valve
One end outlet of body, the application valve body is fixedly installed with oil return pipe, is fixedly installed with cooling wind in the pipeline of the oil return pipe
The other end of fan and return filter, the oil return pipe is connected in fuel tank.
Further, the input terminal of the high-pressure oil pump is fixedly installed with servo motor by shaft coupling, passes through servo electricity
Machine is driven, it is ensured that speed stability, while noise is smaller, energy conservation and environmental protection.
Further, the exit side of the high pressure oil inlet pipe is equipped with vibration-proof pressure gauge by pipeline, described
The first overflow valve is installed by pipeline in the exit other side of high pressure oil inlet pipe, by installing overflow valve, guarantees reflux and control
Accuracy, it is safe and efficient.
Further, the exit of first overflow valve butts up against second solenoid valve and application valve body.
Further, the exit other side of second high-pressure rubber pipe is equipped with the second overflow valve by pipeline, described
The exit of second overflow valve butts up against the exit of application valve body, and multiple pipelines carry out parallel connection, is conducive to reflux, stability and high efficiency.
Further, the upper surface of the fuel tank is fixedly installed with oil temperature gauge and remote level indicator, the fuel tank it is outer
Side surface front end is equipped with installation union, and the outer surface of the installation union is fixedly installed with liquidometer, by installing oil temperature
Table and liquidometer are conducive to detection fuel tank state, guarantee safe operation.
Further, the front side surface upper end of the fuel tank is equipped with arc panel, and the inner surface of the arc panel is equipped with arc
The inner surface of shape slot, the arc groove slidably connects limited block.
Further, the outer surface thread of the limited block is connected with fixing screws, and the outer surface of the fixing screws is logical
It crosses connecting plate and is fixedly installed with arc pressuring plate, the inner surface of the arc pressuring plate compresses the outer surface for being connected to liquidometer, leads to
The arc pressuring plate that is slidably installed on arc panel is crossed to be fixed liquidometer, can be adjusted according to the needs flip angle, adaptability
Height, guarantees installation verticality, and convenience and high-efficiency is conducive to use.
3. beneficial effect
Compared with the prior art, the present invention has the advantages that
(1) this programme is crossed is controlled using servo motor revolving speed, therefore no longer needs servo valve or proportioning valve, to eliminate valence
The servo valve of lattice valuableness, at the same it is very low to the required precision of whole system oil sources oil filter.
(2) flow for using servo motor revolving speed control oil pump, hence for the test for requiring lasting pressure maintaining, servo motor
Revolving speed can be at low speed, fever and cooling requirement is effectively reduced,
(3) servo motor under the control of the controller, be no longer high speed continuous service, only operating on demand, thus whole
The noise that a electro-hydraulic servo hydraulic control system based on Serve Motor Control generates substantially reduces
(4) by installation oil temperature gauge and liquidometer, it is conducive to detection fuel tank state, guarantees safe operation.
(5) liquidometer is fixed by the arc pressuring plate being slidably installed on arc panel, can be adjusted according to the needs and turns over
Gyration, adaptability is high, guarantees installation verticality, and convenience and high-efficiency is conducive to use.
Detailed description of the invention
Fig. 1 is control system piping diagram of the invention；
Fig. 2 is the side schematic view that liquidometer of the invention is installed；
Fig. 3 is the top cross-sectional view that arc pressuring plate of the invention connects.
Figure label explanation:
1 liquidometer, 2 oil temperature gauges, 3 remote level indicators, 4 fuel tanks, 5 high-pressure oil pumps, 6 servo motors, 7 shaft couplings, 8 high pressures
Oil inlet pipe, 9 oil return pipes, 10 cooling fans, 11 return oil filters, 12 application valve bodies, 13 vibration-proof pressure gauges, 14 first overflow valves,
15 throttle grverning valves, 16 first solenoid valves, 17 second solenoid valves, 18 third solenoid valves, 19 the 4th solenoid valves, 20 second overflows
Valve, 21 first high-pressure rubber pipes, 22 second high-pressure rubber pipes, 23 oil cylinders, 31 unions, 32 arc panels, 33 arc grooves, 34 limited blocks,
35 fixing screws, 36 connecting plates, 37 arc pressuring plates.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description；Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "inner", "outside", " top/bottom end "
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and simplification retouch
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot understand
For indication or suggestion relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " is set
Be equipped with ", " be arranged/connect ", " connection " etc., shall be understood in a broad sense, such as " connection ", may be a fixed connection, be also possible to removable
Connection is unloaded, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements.It for the ordinary skill in the art, can be specific
Situation understands the concrete meaning of above-mentioned term in the present invention.
Fig. 1-3, a kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control, including fuel tank 4 are please referred to, please be join
Fig. 1 is read, the exit of fuel tank 4 is fixedly installed with high-pressure oil pump 5 by pipeline, and the exit of high-pressure oil pump 5 is fixedly connected with height
It is pressed into oil pipe 8, there are the first solenoid valve 16,16 exit of the first solenoid valve in the other end end of high pressure oil inlet pipe 8 by Pipe installing
The rodless cavity entrance of oil cylinder 23 is fixedly connected on by the first high-pressure rubber pipe 21, the inlet of the first solenoid valve 16 passes through pipeline simultaneously
It is associated with throttle grverning valve 15, the exit of throttle grverning valve 15 is connected with second solenoid valve 17, second solenoid valve 17 by pipeline
Exit be parallel to the exit of the first solenoid valve 16, the rod chamber inlet of oil cylinder 23 is fixedly installed with the second high-pressure rubber pipe
22, the second high-pressure rubber pipe 22 separately has but is in series with third solenoid valve 18 and the 4th solenoid valve 19, is solenoid directional control valve, Ke Yigai
Become oil circuit direction, the exit of the 4th solenoid valve 19 is fixedly installed with application valve body 12, and one end of application valve body 12, which exports, to be fixed
Oil return pipe 9 is installed, is fixedly installed with cooling fan 10 and return filter 11 in the pipeline of oil return pipe 9, oil return pipe 9 it is another
Termination passes through fuel tank 4, and the input terminal of high-pressure oil pump 5 is fixedly installed with servo motor 6 by shaft coupling 7, and high pressure oil inlet pipe 8 goes out
The side Kou Chu is equipped with vibration-proof pressure gauge 13 by pipeline, and the exit other side of high pressure oil inlet pipe 8 passes through pipeline installation first
The exit of overflow valve 14, the first overflow valve 14 butts up against second solenoid valve 17 and application valve body 12, it is characterised in that: second is high
The exit other side of moulding pipe 22 is equipped with the second overflow valve 20 by pipeline, and the exit of the second overflow valve 20 butts up against control
The exit of valve body 12 processed may be implemented bulk loop to control oil cylinder 23, facilitate stabilization, energy conservation and environmental protection.
Fig. 2 and Fig. 3 are please referred to, the upper surface of fuel tank 4 is fixedly installed with oil temperature gauge 2 and remote level indicator 3, fuel tank 4
Outer surface front end is equipped with installation union 31, is pivotally attached to bottom, while link position is equipped with sealing ring, can the company of swing
It connects, while avoiding revealing, safety and stability, the outer surface of installation union 3 is fixedly installed with liquidometer 1, the front side surface of fuel tank 4
Upper end is equipped with arc panel 32, and the inner surface of arc panel 32 is equipped with arc groove 33, and arc groove 33 is that the small T-type of internal big opening is cut
Face structure can guarantee that limited block 34 in internal slide, while will not be deviate from, and then can pass through fixing screws outward in this way
35 tense the fixed position of increase frictional force, also can be fixed liquidometer 1 by arc pressuring plate 37, be conducive to that angle is fixedly mounted
Degree eliminates the error of perpendicularity, guarantees degree accuracy, is conducive to use, the inner surface of arc groove 33 slidably connects limited block
34, the outer surface thread of limited block 34 is connected with fixing screws 35, and the outer surface of fixing screws 35 passes through the fixed peace of connecting plate 36
Equipped with arc pressuring plate 37, the inner surface of arc pressuring plate 37 compresses the outer surface for being connected to liquidometer 1.
In use, fuel tank 4 can be first fixedly mounted, each pipeline is then connected, while when installing liquidometer 1, it can be with
It is attached fixation by union 31, while being navigated on arc panel 32, the error of perpendicularity is at this moment detected, it is then adjustable
Limited block 34 will not be deviate from outward in internal slide, and then it is solid increase frictional force can be tensed by fixing screws 35
Positioning is set, and also can be fixed liquidometer 1 by arc pressuring plate 37, is conducive to that angle is fixedly mounted, is eliminated the error of perpendicularity,
Guarantee degree accuracy, is conducive to use, and in system control, servo motor 6 drives high-pressure oil pump 5 to control by shaft coupling 7
Valve body 12 processed provides high pressure liquid pressure oil, and the first overflow valve 14 is to guarantee that whole system maximum pressure is 31.5MPa, throttle grverning valve
15 flow back to fuel tank 4 for extra hydraulic oil, when the piston of oil cylinder 23 stretches out, 18 valve head of the first solenoid valve 16 and third solenoid valve
It lights, second solenoid valve 17 and 19 valve head of the 4th solenoid valve extinguish, and oil circuit enters from the rodless cavity of oil cylinder 23 at this time, rod chamber
Hydraulic oil flows back to fuel tank 4, when the piston of oil cylinder 23 retracts, second solenoid valve 17, third solenoid valve 18 and the 4th solenoid valve 19
It lights simultaneously, 16 valve head of the first solenoid valve extinguishes, and oil circuit enters from the rod chamber of oil cylinder 23 at this time, and the hydraulic oil of rodless cavity flows back to
Fuel tank 4, because driving the 6 revolving speed continuously adjustable of servo motor of high-pressure oil pump 5, to make the flow into oil cylinder 23 can be on-demand
Control, therefore the stretching speed continuously adjustable of the piston of oil cylinder 23, when moving, controller is automatically according to work for the piston of oil cylinder 23
The feedback speed for filling in position carries out the revolving speed that PID adjusts servo motor 6, because the speed responsive of servo motor is quickly, acceleration and deceleration
Time is very short, therefore the piston speed of service is very steady.
The foregoing is intended to be a preferred embodiment of the present invention；But scope of protection of the present invention is not limited thereto.
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
It improves design and is subject to equivalent substitution or change, should be covered by the scope of protection of the present invention.
Claims (8)
1. a kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control, including fuel tank (4), it is characterised in that: described
The exit of fuel tank (4) is fixedly installed with high-pressure oil pump (5) by pipeline, and the exit of the high-pressure oil pump (5) is fixedly connected
Have high pressure oil inlet pipe (8), the other end end of the high pressure oil inlet pipe (8) has the first solenoid valve (16) by Pipe installing, described
First solenoid valve (16) exit is fixedly connected on the rodless cavity entrance of oil cylinder (23) by the first high-pressure rubber pipe (21), and described the
The inlet of one solenoid valve (16) is parallel with throttle grverning valve (15) by pipeline, and the exit of the throttle grverning valve (15) is logical
Piping is connected with second solenoid valve (17), and the exit of the second solenoid valve (17) is parallel to going out for the first solenoid valve (16)
At mouthful, the rod chamber inlet of the oil cylinder (23) is fixedly installed with the second high-pressure rubber pipe (22), second high-pressure rubber pipe
(22) separately have but be in series with a third solenoid valve (18) and the 4th solenoid valve (19), the exit of the 4th solenoid valve (19) is consolidated
Dingan County is equipped with application valve body (12), and one end outlet of the application valve body (12) is fixedly installed with oil return pipe (9), the oil return pipe
(9) be fixedly installed with cooling fan (10) and return filter (11) in pipeline, the other end of the oil return pipe (9) connect in
Fuel tank (4).
2. a kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control according to claim 1, feature exist
In: the input terminal of the high-pressure oil pump (5) is fixedly installed with servo motor (6) by shaft coupling (7).
3. a kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control according to claim 1, feature exist
In: the exit side of the high pressure oil inlet pipe (8) is equipped with vibration-proof pressure gauge (13) by pipeline, the high pressure oil inlet
The exit other side for managing (8) the first overflow valve (14) are installed by pipeline.
4. a kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control according to claim 3, feature exist
In: the exit of first overflow valve (14) butts up against second solenoid valve (17) and application valve body (12).
5. a kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control according to claim 1, feature exist
In: the exit other side of second high-pressure rubber pipe (22) is equipped with the second overflow valve (20) by pipeline, and described second overflows
The exit of stream valve (20) butts up against the exit of application valve body (12).
6. a kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control according to claim 1, feature exist
In: the upper surface of the fuel tank (4) is fixedly installed with oil temperature gauge (2) and remote level indicator (3), the outside of the fuel tank (4)
Front end surface is equipped with installation union (31), and the outer surface of installation union (3) is fixedly installed with liquidometer (1).
7. a kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control according to claim 1, feature exist
In: the front side surface upper end of the fuel tank (4) is equipped with arc panel (32), and the inner surface of the arc panel (32) is equipped with arc groove
(33), the inner surface of the arc groove (33) slidably connects limited block (34).
8. a kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control according to claim 7, feature exist
In: the outer surface thread of the limited block (34) is connected with fixing screws (35), and the outer surface of the fixing screws (35) passes through
Connecting plate (36) is fixedly installed with arc pressuring plate (37), and the inner surface compression of the arc pressuring plate (37) is connected to liquidometer
(1) outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910534689.9A CN110332160A (en) | 2019-06-20 | 2019-06-20 | A kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910534689.9A CN110332160A (en) | 2019-06-20 | 2019-06-20 | A kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110332160A true CN110332160A (en) | 2019-10-15 |
Family
ID=68142228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910534689.9A Pending CN110332160A (en) | 2019-06-20 | 2019-06-20 | A kind of electro-hydraulic servo hydraulic control system based on Serve Motor Control |
Country Status (1)
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| CN (1) | CN110332160A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111618364A (en) * | 2020-04-20 | 2020-09-04 | 浙江奥林发机床有限公司 | Intelligent speed regulating system capable of automatically regulating feed speed according to material sawing surface |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3474824A (en) * | 1968-01-17 | 1969-10-28 | Deere & Co | Dump valve for hydraulic control system |
| US3973399A (en) * | 1975-12-29 | 1976-08-10 | Deere & Company | Demand compensated hydraulic system with pilot line dither |
| CN101761521A (en) * | 2009-12-11 | 2010-06-30 | 上海诺玛液压系统有限公司 | Precision load positioner |
| CN203743138U (en) * | 2014-01-10 | 2014-07-30 | 上海小荷展示器材有限公司 | Control system of high-stability and large-radian pipe bending machine |
| CN204099317U (en) * | 2014-09-03 | 2015-01-14 | 陕西汽车集团有限责任公司 | Wing opening type box van and flank thereof open and close oil cylinder synchronization hydraulic system |
| CN206320089U (en) * | 2016-12-23 | 2017-07-11 | 南京埃斯顿自动化股份有限公司 | Hydraulic control system based on electro-hydraulic servo type hydraulic press |
| CN108050361A (en) * | 2017-12-15 | 2018-05-18 | 中天建设集团浙江安装工程有限公司 | A kind of angle-adjustable support |
-
2019
- 2019-06-20 CN CN201910534689.9A patent/CN110332160A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3474824A (en) * | 1968-01-17 | 1969-10-28 | Deere & Co | Dump valve for hydraulic control system |
| US3973399A (en) * | 1975-12-29 | 1976-08-10 | Deere & Company | Demand compensated hydraulic system with pilot line dither |
| CN101761521A (en) * | 2009-12-11 | 2010-06-30 | 上海诺玛液压系统有限公司 | Precision load positioner |
| CN203743138U (en) * | 2014-01-10 | 2014-07-30 | 上海小荷展示器材有限公司 | Control system of high-stability and large-radian pipe bending machine |
| CN204099317U (en) * | 2014-09-03 | 2015-01-14 | 陕西汽车集团有限责任公司 | Wing opening type box van and flank thereof open and close oil cylinder synchronization hydraulic system |
| CN206320089U (en) * | 2016-12-23 | 2017-07-11 | 南京埃斯顿自动化股份有限公司 | Hydraulic control system based on electro-hydraulic servo type hydraulic press |
| CN108050361A (en) * | 2017-12-15 | 2018-05-18 | 中天建设集团浙江安装工程有限公司 | A kind of angle-adjustable support |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111618364A (en) * | 2020-04-20 | 2020-09-04 | 浙江奥林发机床有限公司 | Intelligent speed regulating system capable of automatically regulating feed speed according to material sawing surface |
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Application publication date: 20191015 |