CN204041583U - A kind of servo-closed type hydraulic differential device - Google Patents
A kind of servo-closed type hydraulic differential device Download PDFInfo
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- CN204041583U CN204041583U CN201420509792.0U CN201420509792U CN204041583U CN 204041583 U CN204041583 U CN 204041583U CN 201420509792 U CN201420509792 U CN 201420509792U CN 204041583 U CN204041583 U CN 204041583U
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- oil circuit
- fuel tank
- oil
- actuating motor
- oil pump
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Abstract
The utility model discloses a kind of servo-closed type hydraulic differential device, by actuating motor, oil pump, differential cylinder, compensate fuel tank, servo driver forms, actuating motor connects oil pump, actuating motor sends operating instruction according to servo driver and drives oil pump to rotate, compensate fuel tank to be connected with oil pump, each relief valve in parallel on oil circuit A and oil circuit B, oil circuit B goes back an one-way valve in parallel to compensating fuel tank, its direction is unidirectional opening for compensating fuel tank to oil circuit B, oil circuit A goes back a Pilot operated check valve in parallel to compensating fuel tank, its direction is unidirectional opening for compensating fuel tank to oil circuit A, the control port of Pilot operated check valve is communicated with oil circuit B, actuating motor is also provided with encoder, is provided with displacement transducer on the side of differential cylinder, encoder and displacement transducer by the signal feed back that detects to servo driver.The utility model can realize volumetric void fraction to differential cylinder, has energy-saving effect, can be widely used in a loop operating mode.
Description
Technical field
The utility model relates to a kind of device for hydraulic pressure electromechanical equipment, is specifically related to a kind of servo-closed type hydraulic differential device, can complete separately the device controlling the movement velocity of differential hydro cylinder, direction and position.
Background technique
Hydraulic control system has volumetric void fraction and the large class of valve control two, in general, adopts valve control techniques, and adopt Volume Control Technology at high-power system in the middle low power system high to dynamic response requirement.There is large restriction loss in the maximum deficiency of valve control system, system energy efficiency is low and cause system to generate heat, so Volume Control Technology is a present research direction, new developing direction controls cylinder action without valve, directly controls with oil hydraulic pump.When actuator is motor or double acting cylinder, direct use oil pump control realizes easily, but be differential oil cylinder in a lot of occasion actuator, a very large technical problem will be there is in direct use oil pump control, because the working flow of differential cylinder both direction action is different, cause the oil extraction flow of oil pump and the oily flow of suction to be asymmetric, therefore, directly can not realize volumetric void fraction.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of hydraulic differential device that can realize volumetric void fraction to differential cylinder.
The utility model solves the technological scheme that its technical problem adopts: a kind of servo-closed type hydraulic differential device, by actuating motor, oil pump, differential cylinder, compensate fuel tank, servo driver forms, described actuating motor connects oil pump, actuating motor sends operating instruction according to servo driver and drives oil pump to rotate, described compensation fuel tank is connected with oil pump, described oil pump has two hydraulic fluid ports, a hydraulic fluid port is connected with the rodless cavity of differential cylinder by oil circuit A, another hydraulic fluid port is connected with the rod chamber of differential cylinder by oil circuit B, each relief valve in parallel on described oil circuit A and oil circuit B, the pressure port P of two relief valves is connected with oil circuit A and oil circuit B respectively, the oil return inlet T of two relief valves is connected with compensation fuel tank, oil circuit B goes back an one-way valve in parallel to compensating fuel tank, its direction is unidirectional opening for compensating fuel tank to oil circuit B, described oil circuit A goes back a Pilot operated check valve in parallel to compensating fuel tank, its direction is unidirectional opening for compensating fuel tank to oil circuit A, the control port of described Pilot operated check valve is communicated with oil circuit B, described actuating motor is also provided with encoder, for detecting the rotating speed of actuating motor and turning to, be provided with displacement transducer on the side of differential cylinder, for detecting the position that differential cylinder runs, described encoder and displacement transducer by the signal feed back that detects to servo driver.
The beneficial effects of the utility model are: because servo-closed type hydraulic differential device of the present utility model is directly by controlling the clockwise and anticlockwise of actuating motor and stopping controlling stretching out, retract and stopping of differential cylinder, avoid and utilize selector valve to control and the energy loss of generation, energy-conservation effect can be played; The utility model make use of compensation fuel tank, and whole device is closed type structure, does not communicate with air, and the theoretical capacity compensating fuel tank can be the difference in volume in oil cylinder two chamber, and very little, whole device can be accomplished closely.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
With reference to Fig. 1, a kind of servo-closed type hydraulic differential device, is made up of actuating motor 1, oil pump 2, differential cylinder 3, compensation fuel tank 6, servo driver 9.Actuating motor 1 connects oil pump 2, and actuating motor 1 sends operating instruction according to servo driver 9 and drives oil pump 2 to rotate, and compensates fuel tank 6 and is connected with oil pump 2.Oil pump 2 has two hydraulic fluid ports, and a hydraulic fluid port is connected with the rodless cavity of differential cylinder 3 by oil circuit A10, and another hydraulic fluid port is connected with the rod chamber of differential cylinder 3 by oil circuit B11.On oil circuit A10 and oil circuit B11, the pressure port P of each relief valve in parallel 4, two relief valves 4 is connected with oil circuit A10 and oil circuit B11 respectively, and the oil return inlet T of two relief valves 4 is all connected with compensation fuel tank 6.On oil circuit B11, also an one-way valve 5 in parallel is to compensation fuel tank 6, and its direction is unidirectional opening for compensating fuel tank 6 to oil circuit B11.On oil circuit A10, also a Pilot operated check valve 12 in parallel is to compensation fuel tank 6, and its direction is unidirectional opening for compensating fuel tank 6 to oil circuit A10, and the control port of Pilot operated check valve 12 is communicated with oil circuit B11.Actuating motor 1 is also provided with encoder 7, for detecting the rotating speed of actuating motor 1 and turning to, be provided with displacement transducer 8 on the side of differential cylinder 3, for detecting the position that differential cylinder runs, encoder 7 and displacement transducer 8 by the signal feed back that detects to servo driver 9.
Working principle of the present utility model: input the direction of differential cylinder action, speed and position, actuating motor drives oil pump to rotate, if stretch out instruction, oil circuit A exports high pressure oil, promotion oil cylinder stretches out, and oil circuit B is oil pump suction low pressure area, because rod chamber is fewer than the fluid of rodless cavity, can form negative pressure, the fluid compensating fuel tank can be mended on oil circuit B by one-way valve, if retraction instruction, oil circuit B exports high pressure oil, oil cylinder is retracted, be communicated with the control port of Pilot operated check valve because oil circuit B exports high pressure oil simultaneously, Pilot operated check valve can reversely be opened, unnecessary flow is got back to and is compensated in fuel tank, encoder detects the actual speed of motor, feed back to servo driver and input value compares, the data of correcting are re-entered, export the speed of actual demand, displacement transducer detects the position of oil cylinder, when the position of input requirements being detected, servo driver at once instruction actuating motor stops, zero output, oil cylinder stops action.
Although describe mode of execution of the present utility model by reference to the accompanying drawings above, those skilled in the art can make various distortion or amendment within the scope of the appended claims.
Claims (1)
1. a servo-closed type hydraulic differential device, it is characterized in that, by actuating motor, oil pump, differential cylinder, compensate fuel tank, servo driver forms, described actuating motor connects oil pump, actuating motor sends operating instruction according to servo driver and drives oil pump to rotate, described compensation fuel tank is connected with oil pump, described oil pump has two hydraulic fluid ports, a hydraulic fluid port is connected with the rodless cavity of differential cylinder by oil circuit A, another hydraulic fluid port is connected with the rod chamber of differential cylinder by oil circuit B, each relief valve in parallel on described oil circuit A and oil circuit B, the pressure port P of two relief valves 4 is connected with oil circuit A and oil circuit B respectively, the oil return inlet T of relief valve is connected with compensation fuel tank, described oil circuit B goes back an one-way valve in parallel to compensating fuel tank, its direction is unidirectional opening for compensating fuel tank to oil circuit B, described oil circuit A goes back a Pilot operated check valve in parallel to compensating fuel tank, its direction is unidirectional opening for compensating fuel tank to oil circuit A, the control port of described Pilot operated check valve is communicated with oil circuit B, described actuating motor is also provided with encoder, for detecting the rotating speed of actuating motor and turning to, be provided with displacement transducer on the side of differential cylinder, for detecting the position that differential cylinder runs, described encoder and displacement transducer by the signal feed back that detects to servo driver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420509792.0U CN204041583U (en) | 2014-09-05 | 2014-09-05 | A kind of servo-closed type hydraulic differential device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420509792.0U CN204041583U (en) | 2014-09-05 | 2014-09-05 | A kind of servo-closed type hydraulic differential device |
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| CN204041583U true CN204041583U (en) | 2014-12-24 |
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| CN201420509792.0U Active CN204041583U (en) | 2014-09-05 | 2014-09-05 | A kind of servo-closed type hydraulic differential device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570240A (en) * | 2016-02-25 | 2016-05-11 | 河海大学常州校区 | Direct-driven hydropress electro-hydraulic servo system |
| CN105570203A (en) * | 2016-01-12 | 2016-05-11 | 浙江大学 | Efficient and high-precision hydraulic control system adopting combination of pump and valve |
| CN111691491A (en) * | 2020-06-23 | 2020-09-22 | 上海华兴数字科技有限公司 | Energy-saving control method of excavator and excavator |
| CN111810495A (en) * | 2020-07-30 | 2020-10-23 | 宁波埃科思注塑科技有限公司 | Injection molding machine mode locking hydraulic system of closed oil circuit |
| CN111852996A (en) * | 2020-07-30 | 2020-10-30 | 宁波埃科思注塑科技有限公司 | Drive control system of closed oil circuit |
-
2014
- 2014-09-05 CN CN201420509792.0U patent/CN204041583U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570203A (en) * | 2016-01-12 | 2016-05-11 | 浙江大学 | Efficient and high-precision hydraulic control system adopting combination of pump and valve |
| CN105570240A (en) * | 2016-02-25 | 2016-05-11 | 河海大学常州校区 | Direct-driven hydropress electro-hydraulic servo system |
| CN111691491A (en) * | 2020-06-23 | 2020-09-22 | 上海华兴数字科技有限公司 | Energy-saving control method of excavator and excavator |
| CN111810495A (en) * | 2020-07-30 | 2020-10-23 | 宁波埃科思注塑科技有限公司 | Injection molding machine mode locking hydraulic system of closed oil circuit |
| CN111852996A (en) * | 2020-07-30 | 2020-10-30 | 宁波埃科思注塑科技有限公司 | Drive control system of closed oil circuit |
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| C14 | Grant of patent or utility model | ||
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