CN209278261U - A kind of position control system of hydraulic step actuator - Google Patents
A kind of position control system of hydraulic step actuator Download PDFInfo
- Publication number
- CN209278261U CN209278261U CN201822056371.8U CN201822056371U CN209278261U CN 209278261 U CN209278261 U CN 209278261U CN 201822056371 U CN201822056371 U CN 201822056371U CN 209278261 U CN209278261 U CN 209278261U
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- Prior art keywords
- switching valve
- slave cylinder
- valve
- cylinder
- hydraulic
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Abstract
The utility model discloses a kind of position control systems of hydraulic step actuator, position control system includes master cylinder, first slave cylinder, second slave cylinder, first switching valve, second switching valve, third switching valve, 4th switching valve and three-position four-way valve, it is made of inside first slave cylinder and the second slave cylinder a relay piston with sealing element and a reset spring, two ports of described three-position four-way valve one end are connect with hydraulic power source and fuel tank respectively, the port and the first switching valve at the another both ends of three-position four-way valve, the other end of third switching valve connects, the other end of first switching valve one end with the second switching valve respectively, first slave cylinder is connected without spring cavity, the other end of second switching valve, first slave cylinder have spring cavity it is in parallel after connect with the rodless cavity of master cylinder, the rod chamber of master cylinder is connected to the 4th switching valve one end, second Slave cylinder has a spring cavity, the other end of the 4th switching valve and the second slave cylinder have spring cavity it is in parallel after be connected with one end of third switching valve.Accurate hydraulic cylinder step motion can be realized without position sensor in the utility model；System cost is low, has very strong oil resistant pollution capacity.
Description
Technical field
The utility model relates to technical field of hydraulic pressure more particularly to a kind of position control systems of hydraulic step actuator.
Background technique
Occasion high, that structural requirement is compact is required in high-power, position control responsiveness, generally uses electrical-liquid control
Or electro-hydraulic servo control technology.But this kind of technical costs is higher (especially electro-hydraulic servo control), it is sensitive to oil contamination and
System effectiveness is lower.In addition, generally requiring high-precision external or built-in sensors to realize position control, not only increasing volume
Outer cost and installation inconvenience, reduction system reliability.I.e. sensor can not only improve cost and increase failure risk, also will affect
Wiring, while sensor being installed sometimes by the limitation of installation space.
In order to reduce cost and improve system reliability, avoiding or reduce using the sensor in position control is one
Research hotspot.
Summary of the invention
The utility model overcomes the shortcomings of the prior art, and provides a kind of low cost, easy to maintain, position control accuracy
The position control system of high, without gap sensors hydraulic step actuators.
To achieve the above object, the utility model uses following technical scheme:
A kind of position control system of hydraulic step actuator comprising master cylinder, the first slave cylinder, the second slave cylinder,
One switching valve, the second switching valve, third switching valve, the 4th switching valve and three-position four-way valve, first slave cylinder and second from
Dynamic cylinder interior is made of a relay piston with sealing element and a reset spring, two ports of described three-position four-way valve one end
It is connect respectively with hydraulic power source and fuel tank, safety overflow valve, the three-position four-way valve other end is connected between hydraulic power source and three-position four-way valve
Two ports connect with one end of the first switching valve, third switching valve, the other end of the first switching valve respectively with the second switching valve
One end, the first slave cylinder connect without spring cavity, the other end of the second switching valve, the first slave cylinder have spring cavity it is in parallel after
It being connect with the rodless cavity of master cylinder, the rod chamber of master cylinder is connected to the 4th switching valve one end, the second slave cylinder has a spring cavity, and the 4th
The other end of switching valve and the second slave cylinder without spring cavity it is in parallel after be connected with the other end of third switching valve.
First switching valve, the second switching valve, third switching valve and the 4th switching valve are bi-bit bi-pass hydraulic valve.
First switching valve, the second switching valve, third switching valve and the 4th switching valve are the electromagnetic switch of plug-in
Valve.
The utility model uses above technical scheme, has the advantages that
1, there is low cost compared with hydraulic proportional control system and servo-control system, it is easy to maintain, to environmental requirement
Low advantage compared with normal hydraulic control system, and has high degree of automation, and position control accuracy is high, can be in extreme item
(dust, dirt or high-intensity magnetic field) failure-free operation under part.
2, good flow control is not influenced by pressure difference, valve actuation mechanics and size: the gradually position control of both direction
It makes (upper and lower), such as in case of emergency high speed bypass (upper and lower) realizes Rapid reset or full work by opening four switching valves
Make stroke；Accurate incremental motion can be realized without position sensor；System cost is low, and there is very strong oil resistant to pollute energy
Power.
Detailed description of the invention
The utility model is described in further details below in conjunction with the drawings and specific embodiments:
FIG. 1 is a schematic structural view of the utility model.
Specific embodiment
As shown in Figure 1, the utility model position control system includes master cylinder 1, the first slave cylinder 3, the second slave cylinder 2,
One switching valve 4, the second switching valve 5, third switching valve 8, the 4th switching valve 9 and three-position four-way valve 6,3 He of the first slave cylinder
It is made of inside second slave cylinder 2 relay piston with sealing element and a reset spring, described 6 one end of three-position four-way valve
Two ports connect respectively with hydraulic power source and fuel tank 7, between hydraulic power source and three-position four-way valve 6 connect safety overflow valve 10, three
Two ports of 6 other end of four-way valve are connect with one end of the first switching valve 4, third switching valve 8, the other end of the first switching valve 4
Connect respectively with one end of the second switching valve 5, the first slave cylinder 3 without spring cavity, the other end of the second switching valve 5, first from
Dynamic cylinder 3 have spring cavity it is in parallel after connect with the rodless cavity of master cylinder 1, the rod chamber of master cylinder 1 be connected to 9 one end of the 4th switching valve,
Second slave cylinder 2 has a spring cavity, the other end of the 4th switching valve 9 and the second slave cylinder 2 without spring cavity it is in parallel after with third
The other end of switching valve 8 is connected.
First switching valve 4, the second switching valve 5, third switching valve 8 and the 4th switching valve 9 are that bi-bit bi-pass is hydraulic
Valve.
First switching valve 4, the second switching valve 5, third switching valve 8 and the 4th switching valve 9 are the electromagnetism of plug-in
Reversal valve.
Using the control method of above-mentioned position control system, the control method using three-position four-way valve 6 in step mode and
Step, which is moved back in mode, to be switched；
Step mode: 6 left side electromagnet of three-position four-way valve is powered, and locates left position, third switching valve 8 and the 4th switching valve 9 connect
It is logical；First switching valve 4 is connected, and the second switching valve 5 is closed, and the piston of the first slave cylinder 3 is inside 1 rod chamber of hydraulic power source and master cylinder
It is moved upwards under the influence of pressure gap, hydraulic oil is flowed to the rodless cavity of master cylinder 1 by fluid pressure line, and the piston rod of master cylinder 1 executes
Single and accurate forward position stepping；The hydraulic oil of the rod chamber of master cylinder 1 is by hydraulic oil pipe by the 4th switching valve 9, the
Three switching valves 8, three-position four-way valve 6 flow back to fuel tank 7；It reaches home behind position in the piston of the first slave cylinder 3, the first switching valve 4
It closes, the second switching valve 5 is connected, and piston is back into its initial position, the work of the first slave cylinder 3 by the spring of the first slave cylinder 3
Plug is during moving downward, since the hydraulic oil consumption of 3 bottom shift of the first slave cylinder has spring cavity, the liquid of output in its top side
Pressure oil returns to its slave cylinder spring cavity, and the piston rod of master cylinder 1 remains stationary；In the mode of above-mentioned stepping, the second slave cylinder 2
It is motionless that piston remains at same position；When stepping, the first switching valve 4, the switching frequency of the second switching valve 5 and first are driven
The dischargeable capacity of cylinder 3 determines the stretching speed of master cylinder 1；
Step moves back mode: 6 the right electromagnet of three-position four-way valve being powered, right position, the first switching valve 4 and the second switching valve 5 are located
It connects；Third switching valve 8 is connected, and the 4th switching valve 9 is closed, and the piston of the second slave cylinder 2 is in 1 rodless cavity of hydraulic power source and master cylinder
It is moved upwards under the influence of portion's pressure gap, hydraulic oil is flowed to the rod chamber of master cylinder 1 by fluid pressure line, and the piston rod of master cylinder 1 is held
The single and accurate negative sense position stepping of row；The hydraulic oil of the rodless cavity of master cylinder 1 by hydraulic oil pipe by the second switching valve 5,
First switching valve 4, three-position four-way valve 6 flow back to fuel tank 7；It reaches home behind position in the piston of the second slave cylinder 2, third switching valve
8 close, and the 4th switching valve 9 is connected, and piston is back into its initial position, the work of the second slave cylinder 2 by the spring of the second slave cylinder 2
Plug is during moving downward, since the hydraulic oil consumption of 2 bottom shift of the second slave cylinder has spring cavity, the liquid of output in its top side
Pressure oil returns to its slave cylinder spring cavity, and the piston rod of master cylinder 1 remains stationary；In the mode that above-mentioned step is moved back, the first slave cylinder 3
It is motionless that piston remains at same position.When step is moved back, third switching valve 8, the switching frequency of the 4th switching valve 9 and second are driven
The dischargeable capacity of cylinder 2 determines the speed when retraction of master cylinder 1.
Above the preferred embodiment of the patent is described in detail, but this patent is not limited to above-mentioned embodiment party
Formula within the knowledge of one of ordinary skill in the art can also be under the premise of not departing from this patent objective
It makes a variety of changes.
Claims (3)
1. a kind of position control system of hydraulic step actuator, it is characterised in that: it includes master cylinder, the first slave cylinder, second
Slave cylinder, the first switching valve, the second switching valve, third switching valve, the 4th switching valve and three-position four-way valve, first slave cylinder
It is made of with inside the second slave cylinder a relay piston with sealing element and a reset spring, described three-position four-way valve one end
Two ports connect respectively with hydraulic power source and fuel tank, safety overflow valve, 3-position 4-way are connected between hydraulic power source and three-position four-way valve
Two ports of the valve other end are connect with one end of the first switching valve, third switching valve, and the other end of the first switching valve is respectively with
One end of two switching valves, the first slave cylinder are connected without spring cavity, and the other end of the second switching valve, first slave cylinder have spring
It is connect with the rodless cavity of master cylinder after chamber is in parallel, the rod chamber of master cylinder is connected to the 4th switching valve one end, the second slave cylinder has bullet
Spring chamber, the other end of the 4th switching valve and the second slave cylinder without spring cavity it is in parallel after be connected with the other end of third switching valve.
2. a kind of position control system of hydraulic step actuator according to claim 1, it is characterised in that: described first
Switching valve, the second switching valve, third switching valve and the 4th switching valve are bi-bit bi-pass hydraulic valve.
3. a kind of position control system of hydraulic step actuator according to claim 1, it is characterised in that: described first
Switching valve, the second switching valve, third switching valve and the 4th switching valve are the solenoid directional control valve of plug-in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822056371.8U CN209278261U (en) | 2018-12-07 | 2018-12-07 | A kind of position control system of hydraulic step actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822056371.8U CN209278261U (en) | 2018-12-07 | 2018-12-07 | A kind of position control system of hydraulic step actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209278261U true CN209278261U (en) | 2019-08-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822056371.8U Expired - Fee Related CN209278261U (en) | 2018-12-07 | 2018-12-07 | A kind of position control system of hydraulic step actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209278261U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372829A (en) * | 2018-12-07 | 2019-02-22 | 福建工程学院 | A kind of position control system and its control method of hydraulic step actuator |
-
2018
- 2018-12-07 CN CN201822056371.8U patent/CN209278261U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372829A (en) * | 2018-12-07 | 2019-02-22 | 福建工程学院 | A kind of position control system and its control method of hydraulic step actuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190820 Termination date: 20191207 |