CN203230678U - Hydraulic actuator inlet and outlet flow pressure independent controlling system - Google Patents
Hydraulic actuator inlet and outlet flow pressure independent controlling system Download PDFInfo
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- CN203230678U CN203230678U CN 201320222637 CN201320222637U CN203230678U CN 203230678 U CN203230678 U CN 203230678U CN 201320222637 CN201320222637 CN 201320222637 CN 201320222637 U CN201320222637 U CN 201320222637U CN 203230678 U CN203230678 U CN 203230678U
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- proportional flow
- control valve
- flow control
- executive component
- proportional
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Abstract
The utility model relates to a hydraulic actuator inlet and outlet flow pressure independent controlling system. The hydraulic actuator inlet and outlet flow pressure independent controlling system comprises a variable pump, a first proportional flow valve and a second proportional flow valve which are connected with the variable pump, a third proportional flow valve and a forth proportional flow valve; a fuel outlet of the variable pump and two fuel outlets of an actuator are provided with pressure sensors. The first proportional flow valve, the second proportional flow valve, the third proportional flow valve, the forth proportional flow valve and the pressure sensors are connected with a controller; the controller controls the output flow of the variable pump and the valve opening size of the first proportional flow valve and the second proportional flow valve according to the control instruction , and collects the pressure of the fuel outlets of the actuator and controls the valve opening size of the third proportional flow valve and the forth proportional flow valve at fuel outlets. The hydraulic actuator inlet and outlet flow pressure independent controlling system is applicable to hydraulic oil cylinders or hydraulic motors, and heat loss can be effectively reduced.
Description
Technical field
The utility model relates to a kind of hydraulic control system, and especially a kind of hydraulic actuator is imported and exported the flow pressure autonomous control system.
Background technique
Hydraulic actuator generally comprises hydraulic jack and oil hydraulic motor, and it generally all has two hydraulic fluid ports, serves as filler opening or oil outlet.In the existing hydraulic system, hydraulic actuator all adopts the control mode of traditional four-side interlock, at a time can only control pressure or the flow in a chamber.Such control mode can make system produce the not steady of bigger energy loss and executive component action, produces restriction loss etc. because the valve port throttling produces back pressure when needing to descend fast as executive component.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of hydraulic actuator and imports and exports the flow pressure autonomous control system, can reduce the energy loss of hydraulic system, and make the executive component stable action.
In order to solve the problems of the technologies described above, the utility model comprises: variable displacement pump is used for providing hydraulic power to executive component; First proportional flow control valve that is connected with variable displacement pump and second proportional flow control valve are used for control executive component inlet flow rate, and described first proportional flow control valve also is connected with two hydraulic fluid ports of executive component respectively with second proportional flow control valve; The 3rd proportional flow control valve and the 4th proportional flow control valve are used for control executive component outlet pressure, and a hydraulic fluid port of described the 3rd proportional flow control valve and the 4th proportional flow control valve is connected with two hydraulic fluid ports of executive component respectively, and another hydraulic fluid port also is connected with fuel tank; The oil outlet of described variable displacement pump, two hydraulic fluid ports of executive component are provided with pressure transducer, described first proportional flow control valve, second proportional flow control valve, the 3rd proportional flow control valve, the 4th proportional flow control valve, pressure transducer is connected with controller respectively; Described controller is according to the output flow of control command controlled variable pump, and the valve opening size of first proportional flow control valve and second proportional flow control valve, gather the pressure of the oil outlet of executive component, and the 3rd proportional flow control valve of control oil outlet one side or the valve opening size of the 4th proportional flow control valve.
The flow of hydraulic actuator oil-feed side can be regulated by the proportional flow control valve of oil-feed side as required in real time in the utility model, and the back pressure of executive component outlet side is regulated by the proportional flow control valve of outlet side.The displacement signal of system's middle controller collection executive component oil-feed side proportional flow control valve comes the output flow of Moderator Variable pump; Gather the pressure signal of executive component outlet side and compare with the back pressure value that controller is set, its difference is controlled the opening amount of outlet side proportional flow control valve, and difference is gone to zero, and finally reaches the purpose of steady control.Adopt such hydraulic system can reach the purpose that executive component steadily moves and reduces energy loss.
Description of drawings
Accompanying drawing 1 is structure principle chart of the present utility model.
Embodiment
The embodiment that the present invention is cited; just be used for helping to understand the present invention; should not be construed as the restriction to protection domain of the present invention; for those skilled in the art; under the prerequisite that does not break away from inventive concept; can also improve and modify the present invention, these improvement and modification also fall in the scope of claim protection of the present invention.
As shown in Figure 1, the utility model comprises: comprise variable displacement pump 1, be used for providing hydraulic power to executive component 2; First proportional flow control valve 3 that is connected with variable displacement pump 1 and second proportional flow control valve 4 are used for control executive component 2 inlet flow rates, and described first proportional flow control valve 3 also is connected with 2 two hydraulic fluid ports of executive component respectively with second proportional flow control valve 4; The 3rd proportional flow control valve 5 and the 4th proportional flow control valve 6, be used for control executive component 2 outlet pressures, a hydraulic fluid port of described the 3rd proportional flow control valve 5 and the 4th proportional flow control valve 6 is connected with 2 two hydraulic fluid ports of executive component respectively, and another hydraulic fluid port also is connected with fuel tank 7; The oil outlet of described variable displacement pump 1, two hydraulic fluid ports of executive component 2 are provided with pressure transducer 8, described first proportional flow control valve 3, second proportional flow control valve 4, the 3rd proportional flow control valve 5, the 4th proportional flow control valve 6, and pressure transducer 8 is connected with controller 9 respectively; Described controller 9 is according to the output flow of control command controlled variable pump 1, and the valve opening size of first proportional flow control valve 5 and second proportional flow control valve 6, gather the pressure of the oil outlet of executive component 2, and the 3rd proportional flow control valve 5 of control oil outlet one side or the valve opening size of the 4th proportional flow control valve 6.
The oil cylinder of executive component generally is divided into two cavitys, and each cavity is provided with corresponding hydraulic fluid port, and when a hydraulic fluid port was filler opening, another hydraulic fluid port then was oil outlet.The flow of executive component filler opening can be regulated by the proportional flow control valve of filler opening one side as required in real time, and the back pressure of executive component oil outlet can be regulated by the proportional flow control valve of oil outlet one side according to load properties.The displacement signal of system's middle controller collection executive component filler opening one side proportional flow control valve comes the output flow of Moderator Variable pump, gathering the pressure signal of executive component oil outlet one side compares with the back pressure value that controller is set, its difference is controlled the opening amount of oil outlet one side proportional flow control valve, difference is gone to zero, finally reach the purpose of steady control and minimizing energy loss.
The utility model can be used for hydraulic jack or oil hydraulic motor.
Claims (1)
1. hydraulic actuator is imported and exported the flow pressure autonomous control system, it is characterized in that, comprising:
Variable displacement pump (1) is used for providing hydraulic power to executive component (2);
First proportional flow control valve (3) that is connected with variable displacement pump (1) and second proportional flow control valve (4), be used for control executive component (2) inlet flow rate, described first proportional flow control valve (3) also is connected with (2) two hydraulic fluid ports of executive component respectively with second proportional flow control valve (4);
The 3rd proportional flow control valve (5) and the 4th proportional flow control valve (6), be used for control executive component (2) outlet pressure, a hydraulic fluid port of described the 3rd proportional flow control valve (5) and the 4th proportional flow control valve (6) is connected with (2) two hydraulic fluid ports of executive component respectively, and another hydraulic fluid port also is connected with fuel tank (7);
The oil outlet of described variable displacement pump (1), two hydraulic fluid ports of executive component (2) are provided with pressure transducer (8), described first proportional flow control valve (3), second proportional flow control valve (4), the 3rd proportional flow control valve (5), the 4th proportional flow control valve (6), and pressure transducer (8) is connected with controller (9) respectively;
Described controller (9) is according to the output flow of control command controlled variable pump (1), and the valve opening size of first proportional flow control valve (5) and second proportional flow control valve (6), gather the pressure of the oil outlet of executive component (2), and the 3rd proportional flow control valve (5) of control oil outlet one side or the valve opening size of the 4th proportional flow control valve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320222637 CN203230678U (en) | 2013-04-27 | 2013-04-27 | Hydraulic actuator inlet and outlet flow pressure independent controlling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320222637 CN203230678U (en) | 2013-04-27 | 2013-04-27 | Hydraulic actuator inlet and outlet flow pressure independent controlling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203230678U true CN203230678U (en) | 2013-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320222637 Expired - Fee Related CN203230678U (en) | 2013-04-27 | 2013-04-27 | Hydraulic actuator inlet and outlet flow pressure independent controlling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203230678U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104121007A (en) * | 2014-07-15 | 2014-10-29 | 北京市三一重机有限公司 | Control system and method for drilling bucket with enlarged wing and pile machine |
| CN105458857A (en) * | 2015-12-30 | 2016-04-06 | 浙江万丰科技开发股份有限公司 | Constant force compensation device |
| 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 |
| CN107588049A (en) * | 2017-09-15 | 2018-01-16 | 陈保平 | More arm support digital hydraulic systems and more arm support control methods |
-
2013
- 2013-04-27 CN CN 201320222637 patent/CN203230678U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104121007A (en) * | 2014-07-15 | 2014-10-29 | 北京市三一重机有限公司 | Control system and method for drilling bucket with enlarged wing and pile machine |
| CN105458857A (en) * | 2015-12-30 | 2016-04-06 | 浙江万丰科技开发股份有限公司 | Constant force compensation device |
| 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 |
| CN107588049A (en) * | 2017-09-15 | 2018-01-16 | 陈保平 | More arm support digital hydraulic systems and more arm support control methods |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20131009 |