CN101865174A - Constant speed control method of hydraulic cylinder type actuator and device thereof - Google Patents
Constant speed control method of hydraulic cylinder type actuator and device thereof Download PDFInfo
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- CN101865174A CN101865174A CN201010181962A CN201010181962A CN101865174A CN 101865174 A CN101865174 A CN 101865174A CN 201010181962 A CN201010181962 A CN 201010181962A CN 201010181962 A CN201010181962 A CN 201010181962A CN 101865174 A CN101865174 A CN 101865174A
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Abstract
The invention discloses a constant speed control method of a hydraulic cylinder type actuator and a device thereof. The method comprises the following steps that: a rodless chamber and a rod chamber of a hydraulic cylinder are connected with an electromagnetic directional valve through oil ways respectively, wherein each oil way is provided with a throttling screw plug respectively; an electromagnetic directional valve is connected with an oil supply unit; and an electric proportional overflow valve and an overflow loop are arranged on the oil ways between the electromagnetic directional valve and the oil supply unit; and an electric control system controls the electromagnetic directional valve to control the direction of a piston rod and regulates the input current of the electric proportional overflow valve at the same time to ensure the constant to-and-fro speed of the piston rod. The device comprises the electric control system and the electromagnetic directional valve which is communicated with the rodless chamber and the rod chamber on a bidirectional hydraulic cylinder through the oil ways, wherein the input end of the electromagnetic directional valve is communicated with the oil supply unit; throttling screw plugs are arranged on the oil ways; and the electric proportional overflow valve and the overflow loop are connected in series between the electromagnetic directional valve and the oil supply unit. The invention has the advantages of simple and compact structure, low cost, convenient operation, strong suitability, capability of improving the accuracy of the actuator and the like.
Description
Technical field
The present invention is mainly concerned with the actuator field in the machinery, refers in particular to a kind of hydraulic cylinder type actuator.
Background technique
At present, realize that as actuator the hydraulic power control system of exercises has a wide range of applications in engineering machinery field with single rod two-way hydraulic cylinder.The piston rod of oil hydraulic cylinder is when moving back and forth, because it is inconsistent that the difference of load difference and rod chamber and rodless cavity piston area will cause piston rod to stretch out with the speed of withdrawal, and then make the apparatus for work that is driven by piston rod be difficult to realize accurate control automatically, or cause structure quite complicated, realize that cost is very high.When equipment need frequently back and forth be finely tuned the position of actuator according to the working environment variation in the course of the work, its Location accuracy was also very low, causes the machinery operation poor-performing.
Summary of the invention
The technical problem to be solved in the present invention just is: at the technical problem that prior art exists, the invention provides a kind of simple and compact for structure, with low cost, easy to operate, adaptability strong, can improve the constant speed control method and the device thereof of the hydraulic cylinder type actuator of actuator's precision.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of constant speed control method of hydraulic cylinder type actuator, it is characterized in that: the piston rod of oil hydraulic cylinder is as actuator, the rodless cavity of oil hydraulic cylinder links to each other with solenoid directional control valve by oil circuit respectively with rod chamber, be equipped with a throttling plug screw on each oil circuit, solenoid directional control valve links to each other with oil supply unit, and the oil circuit between solenoid directional control valve and the oil supply unit is provided with electric proportional pressure control valve and skimmer circuit; Automatical control system changes the input current of regulating electric proportional pressure control valve when the control solenoid directional control valve is controlled the piston rod travel direction according to construction environment, to adjust the shuttle speed of piston rod, shuttle speed is consistent.
As a further improvement on the present invention:
When reducing the input current of electric proportional pressure control valve, the setting pressure of electric proportional pressure control valve will reduce, and the corresponding flow that increases skimmer circuit has reduced the pressure difference that the throttling plug screw is imported and exported, and the movement velocity of piston rod is reduced; When the input current of the electric proportional pressure control valve that raises, the setting pressure of electric proportional pressure control valve will raise, and the corresponding flow that reduces skimmer circuit has improved the pressure difference that the throttling plug screw is imported and exported, and makes the movement velocity rising of piston rod.
The present invention further provides a kind of constant speed control gear of hydraulic cylinder type actuator, comprise automatical control system and the solenoid directional control valve that is connected by rodless cavity on oil circuit and the two-way hydraulic cylinder and rod chamber, the input end of described solenoid directional control valve is connected with oil supply unit, it is characterized in that: described oil circuit is provided with the throttling plug screw, is in series with electric proportional pressure control valve and skimmer circuit between described solenoid directional control valve and the oil supply unit.
Be serially connected with hydraulic lock on the described oil circuit.
Compared with prior art, the invention has the advantages that: the constant speed control method of hydraulic cylinder type actuator of the present invention and device thereof, adopt the cost effective method of simple and feasible, by cooperating of throttling plug screw and electric proportional pressure control valve, make the piston rod movement speed-controllable of single rod two-way hydraulic cylinder, thereby can guarantee the shuttle speed unanimity of piston rod, and robust motion is good, and then the movement locus of actuator is controlled more accurately and easier realization, thereby improve the construction quality of equipment.
Description of drawings
Fig. 1 is a structural principle schematic representation of the present invention.
Marginal data:
1, two-way hydraulic cylinder; 2, solenoid directional control valve; 3, electric proportional pressure control valve; 4, hydraulic lock; 5, throttling plug screw; 6, oil supply unit; 7, oil circuit; 8, skimmer circuit; 9, automatical control system.
Embodiment
Below with reference to Figure of description and specific embodiment the present invention is described in further details.
As shown in Figure 1, the constant speed control method of hydraulic cylinder type actuator of the present invention, the piston rod of oil hydraulic cylinder is as actuator, the rodless cavity of oil hydraulic cylinder links to each other with solenoid directional control valve by oil circuit respectively with rod chamber, be equipped with a throttling plug screw on each oil circuit, solenoid directional control valve links to each other with oil supply unit, and the oil circuit between solenoid directional control valve and the oil supply unit is provided with electric proportional pressure control valve and skimmer circuit; Automatical control system changes the input current of regulating electric proportional pressure control valve when the control solenoid directional control valve is controlled the piston rod travel direction according to construction environment, to adjust the shuttle speed of piston rod, shuttle speed is consistent, and then makes the movement locus of actuator control more accurately and easier realization.
When reducing the input current of electric proportional pressure control valve, the setting pressure of electric proportional pressure control valve will reduce, and the corresponding flow that increases skimmer circuit has reduced the pressure difference that the throttling plug screw is imported and exported, and the movement velocity of piston rod is reduced; When the input current of the electric proportional pressure control valve that raises, the setting pressure of electric proportional pressure control valve will raise, and the corresponding flow that reduces skimmer circuit has improved the pressure difference that the throttling plug screw is imported and exported, and makes the movement velocity rising of piston rod.
A kind of constant speed control gear of hydraulic cylinder type actuator, comprise automatical control system 9 and the solenoid directional control valve 2 that is connected by rodless cavity on oil circuit 7 and the two-way hydraulic cylinder 1 and rod chamber, the input end of solenoid directional control valve 2 is connected with oil supply unit 6, oil circuit 7 is provided with throttling plug screw 5, is in series with electric proportional pressure control valve 3 and skimmer circuit 8 between solenoid directional control valve 2 and the oil supply unit 6.Throttling plug screw 5 cooperates the speed of regulating piston bar action of being used for electric proportional pressure control valve 3, adopt throttling plug screw 5 also can play the back pressure effect, further improves the stationarity of piston rod movement.Be serially connected with hydraulic lock 4 on the oil circuit 7, hydraulic lock 4 is used for locking oil hydraulic cylinder when 2 times metas of solenoid directional control valve.
Working principle: referring to Fig. 1, when piston rod stretches out, just only give electromagnet Y20b electrical signal, give an amount of input current value of Y10 coil simultaneously, the hydraulic oil that " P " made a slip of the tongue enters the rodless cavity of two-way hydraulic cylinder 1 after solenoid directional control valve 2, throttling plug screw 5, hydraulic lock 4, piston rod stretches out outward.And its movement speed determines during the back is by the coil of electric proportional pressure control valve 3 that at P mouth input flow rate input current and throttling plug screw 5 determine.
When piston rod is withdrawn, just only give electromagnet Y20a electrical signal, give an amount of input current value of Y10 coil simultaneously, the hydraulic oil that " P " made a slip of the tongue enters the rod chamber of two-way hydraulic cylinder 1 after solenoid directional control valve 2, throttling plug screw 5, hydraulic lock 4, and piston rod is withdrawn inward.And its movement speed determines that at P mouth input flow rate input current and throttling plug screw 5 are determined during the back is by electric proportional pressure control valve 3 coils.
Below only be preferred implementation of the present invention, protection scope of the present invention also not only is confined to the foregoing description, and all technological schemes that belongs under the thinking of the present invention all belong to protection scope of the present invention.Should be pointed out that for those skilled in the art the some improvements and modifications not breaking away under the principle of the invention prerequisite should be considered as protection scope of the present invention.
Claims (4)
1. the constant speed control method of a hydraulic cylinder type actuator, it is characterized in that: the piston rod of oil hydraulic cylinder is as actuator, the rodless cavity of oil hydraulic cylinder links to each other with solenoid directional control valve by oil circuit respectively with rod chamber, be equipped with a throttling plug screw on each oil circuit, solenoid directional control valve links to each other with oil supply unit, and the oil circuit between solenoid directional control valve and the oil supply unit is provided with electric proportional pressure control valve and skimmer circuit; Automatical control system changes the input current of regulating electric proportional pressure control valve when the control solenoid directional control valve is controlled the piston rod travel direction according to construction environment, to adjust the shuttle speed of piston rod, shuttle speed is consistent.
2. the constant speed control method of hydraulic cylinder type actuator according to claim 1, it is characterized in that: when reducing the input current of electric proportional pressure control valve, the setting pressure of electricity proportional pressure control valve will reduce, the corresponding flow that increases skimmer circuit, reduced the pressure difference that the throttling plug screw is imported and exported, the movement velocity of piston rod is reduced; When the input current of the electric proportional pressure control valve that raises, the setting pressure of electric proportional pressure control valve will raise, and the corresponding flow that reduces skimmer circuit has improved the pressure difference that the throttling plug screw is imported and exported, and makes the movement velocity rising of piston rod.
3. the constant speed control gear of a hydraulic cylinder type actuator, comprise automatical control system (9) and the solenoid directional control valve (2) that is connected by oil circuit (7) and the last rodless cavity of two-way hydraulic cylinder (1) and rod chamber, the input end of described solenoid directional control valve (2) is connected with oil supply unit (6), it is characterized in that: described oil circuit (7) is provided with throttling plug screw (5), is in series with electric proportional pressure control valve (3) and skimmer circuit (8) between described solenoid directional control valve (2) and the oil supply unit (6).
4. the constant speed control gear of hydraulic cylinder type actuator according to claim 3 is characterized in that: be serially connected with hydraulic lock (4) on the described oil circuit (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010181962 CN101865174B (en) | 2010-05-25 | 2010-05-25 | Constant speed control method of hydraulic cylinder type actuator and device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010181962 CN101865174B (en) | 2010-05-25 | 2010-05-25 | Constant speed control method of hydraulic cylinder type actuator and device thereof |
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| Publication Number | Publication Date |
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| CN101865174A true CN101865174A (en) | 2010-10-20 |
| CN101865174B CN101865174B (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010181962 Active CN101865174B (en) | 2010-05-25 | 2010-05-25 | Constant speed control method of hydraulic cylinder type actuator and device thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108840264A (en) * | 2018-08-28 | 2018-11-20 | 徐州重型机械有限公司 | Wirerope pretightning force loading method and system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1434140A1 (en) * | 1986-04-16 | 1988-10-30 | Всесоюзный Научно-Исследовательский Проектно-Конструкторский И Технологический Институт Безрельсового Электрифицированного Транспорта С Опытным Производством | Hydraulic drive |
| CN2190131Y (en) * | 1994-02-07 | 1995-02-22 | 韶关新世纪技术研究所 | Roadblocking apparatus |
| CN2629904Y (en) * | 2003-06-19 | 2004-08-04 | 广州粤研液压机电有限公司 | Hydraulic automatic die-turning machine |
| CN1560482A (en) * | 2004-03-12 | 2005-01-05 | 浙江大学 | Hydraulic propelling system for mining tunnel driving machine controlled by ratio flow pressure |
| CN201419524Y (en) * | 2009-05-04 | 2010-03-10 | 深圳东风汽车有限公司 | Integrated type hydraulic power system |
| CN101693333A (en) * | 2009-10-15 | 2010-04-14 | 天津港第五港埠有限公司 | Planker overturning device |
-
2010
- 2010-05-25 CN CN 201010181962 patent/CN101865174B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1434140A1 (en) * | 1986-04-16 | 1988-10-30 | Всесоюзный Научно-Исследовательский Проектно-Конструкторский И Технологический Институт Безрельсового Электрифицированного Транспорта С Опытным Производством | Hydraulic drive |
| CN2190131Y (en) * | 1994-02-07 | 1995-02-22 | 韶关新世纪技术研究所 | Roadblocking apparatus |
| CN2629904Y (en) * | 2003-06-19 | 2004-08-04 | 广州粤研液压机电有限公司 | Hydraulic automatic die-turning machine |
| CN1560482A (en) * | 2004-03-12 | 2005-01-05 | 浙江大学 | Hydraulic propelling system for mining tunnel driving machine controlled by ratio flow pressure |
| CN201419524Y (en) * | 2009-05-04 | 2010-03-10 | 深圳东风汽车有限公司 | Integrated type hydraulic power system |
| CN101693333A (en) * | 2009-10-15 | 2010-04-14 | 天津港第五港埠有限公司 | Planker overturning device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108840264A (en) * | 2018-08-28 | 2018-11-20 | 徐州重型机械有限公司 | Wirerope pretightning force loading method and system |
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| Publication number | Publication date |
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| CN101865174B (en) | 2012-12-05 |
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