CN204476902U - A kind of load-sensitive valve - Google Patents
A kind of load-sensitive valve Download PDFInfo
- Publication number
- CN204476902U CN204476902U CN201520026874.4U CN201520026874U CN204476902U CN 204476902 U CN204476902 U CN 204476902U CN 201520026874 U CN201520026874 U CN 201520026874U CN 204476902 U CN204476902 U CN 204476902U
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- valve
- oil
- valve body
- spool
- feed
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- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of load-sensitive valve, comprise oil-feed valve component, several pieces selector valves, oil return valve body, be located at the three-way flowrate valve in fuel tap body, three-way flowrate valve comprises the valve seat be fixedly arranged in oil-feed valve body, valve pocket and spring seat, spool and spring, valve seat is provided with the endoporus be connected with filler opening, the oil inlet hole of three-way flowrate valve is the throttle orifice being located at spool front end, valve pocket front end be provided with the oil back chamber be connected with oil return valve body between spool, two oil outlets of three-way flowrate valve are located in spring seat and in the valve pocket at spool rear respectively, oil-feed valve body is provided with the relief hole be connected with the oil outlet in valve pocket, this relief hole is connected with oil return valve body after connecting with the meta pressure release oil circuit of each selector valve, the filler opening of each selector valve is all connected with the oil drain out of one-way valve, its return opening is all connected with oil return valve body, the guiding valve of each selector valve is equipped with throttling groove.Comparatively simple, the newly-increased control unit of load pressure feedback oil circuit of the present utility model is few, has the advantage being easy to manufacture, cost is low, and stable conditions.
Description
Technical field
The utility model relates to a kind of load-sensitive valve.
Background technique
Now widely used Load sensing system is one and has Pressure difference feedback, realizes pump or valve to the system of induced pressure servo antrol under flow instruction condition.Hydraulic load sensing technology is applied in the hydraulic system of engineering machinery, can control one or more executive component work, and fine setting performance is very good; Under the prerequisite meeting the various controlling functions of machine, decrease the pressure loss, raise the efficiency, have better Economy, reliability and advance, because the remarkable advantage that it is energy-conservation, efficiency is high and the life-span is long obtains a wide range of applications in Modern hydraulic engineering machinery.No matter that pump or valve are to the system of induced pressure servo antrol, all need to arrange a load-sensitive valve for reaching control effects, existing load-sensitive valve, all need arrange more complicated LS load pressure feedback oil circuit and control unit in every sheet selector valve, its structure is comparatively complicated, and manufacture difficulty is large, cost is also higher, and easily interact between each executive component, operating mode is difficult to stablize, and system is normally run and is affected.
Summary of the invention
The purpose of this utility model is for prior art above shortcomings, provides a kind of load-sensitive valve, and its load pressure feedback oil circuit is comparatively simple, newly-increased control unit is few, there is the advantage being easy to manufacture, cost is low, and stable conditions, the normal operation of system can be ensured.
For achieving the above object, load-sensitive valve of the present utility model, comprise the oil-feed valve component be connected, selector valve more than two panels, oil return valve body, oil-feed valve component comprises oil-feed valve body, be located at the filler opening in oil-feed valve body, the one-way valve be connected with filler opening, selector valve includes commutation valve body, filler opening, return opening, two actuator ports, meta pressure release oil circuit and guiding valve, it is characterized in that in oil-feed valve body, be also provided with the three-way flowrate valve be connected with filler opening, three-way flowrate valve comprises the valve seat be fixedly arranged in oil-feed valve body, valve pocket and spring seat, slide the spool be located in valve pocket, be located at the spring between spring seat and spool, valve seat is provided with the endoporus be connected with filler opening, the oil inlet hole of three-way flowrate valve is the throttle orifice being located at spool front end, valve pocket front end be provided with the oil back chamber be connected with oil return valve body between spool, two oil outlets of three-way flowrate valve are located in spring seat and in the valve pocket at spool rear respectively, safety valve is provided with in the oil-feed valve body at spring seat rear, the return opening of safety valve is connected with oil return valve body, oil-feed valve body is provided with the relief hole be connected with the oil outlet in valve pocket, this relief hole is connected with oil return valve body after connecting with the meta pressure release oil circuit of each selector valve again, the filler opening of each selector valve is all connected with the oil drain out of described one-way valve, the return opening of each selector valve is all connected with oil return valve body, the guiding valve that each selector valve is corresponding with respective meta pressure release oil circuit is equipped with throttling groove.
Working principle of the present utility model is:
When each selector valve does not all work, the meta pressure release oil circuit of the spring chamber of a part of hydraulic oil in oil-feed valve body after the throttle orifice, spool of spool front end, oil outlet in valve pocket, relief hole, each selector valve communicates with the return opening of oil return valve body, the spring chamber of three-way flowrate valve is in low-pressure state, another part hydraulic oil flows into oil return valve body through oil back chamber, therefore oil-feed is in low pressure oil return state, closed check valve; When selector valve arbitrary in system works, its guiding valve moves in commutation valve body, make the flow of its throttling groove control meta pressure release oil circuit descending until final plant closure, such motion state makes the spring chamber pressure of three-way flowrate valve progressively rise to system maximum pressure (this pressure is set up by safety valve) by 0 accordingly, one-way valve is open simultaneously, in the process, as:
1. when the difference of the spring chamber pressure of the inlet pressure in oil-feed valve body and three-way flowrate valve is greater than the spring force of three-way flowrate valve, spool is still in opening state, oil back chamber communicates with filler opening, three-way flowrate valve is in SHUNT state, the hydraulic oil of shunting flows into oil return valve body, and shunt volume with the increase of sliding valve movement stroke from large to small, corresponding each selector valve obtains ascending flow;
2., when the difference of the spring chamber pressure of the inlet pressure in oil-feed valve body and three-way flowrate valve is less than or equal to the spring force of three-way flowrate valve, spool is closed under spring force, and oil back chamber is cut off, and each selector valve obtains whole oil-feed flow;
Therefore, after understanding main computer boxes applying working condition, the damping value of Proper Match throttling spool hole and guiding valve throttling groove and the spring force of three-way flowrate valve, just can realize the ideal curve of actuator's flow with sliding valve movement stroke, namely realize load-sensitive function;
The utility model utilizes selector valve existing meta pressure release oil circuit, throttling groove set up by guiding valve, the damping value of Proper Match throttling spool hole and guiding valve throttling groove and the spring force of three-way flowrate valve can realize load feedback and distribute controlling flow, its load pressure feedback oil circuit is comparatively simple, newly-increased control unit is few, have the advantage being easy to manufacture, cost is low, and each executive component is independent of each other, stable conditions, can ensure the normal operation of system;
As further improvement of the utility model, the sealing surface that valve seat coordinates with spool is the conical surface; Sealing can be improved and be convenient to shunting;
In sum, load pressure feedback oil circuit of the present utility model is comparatively simple, and newly-increased control unit is few, has the advantage being easy to manufacture, cost is low, and stable conditions, the normal operation of system can be ensured.
Accompanying drawing explanation
Fig. 1 is the plan view of the utility model embodiment.
Fig. 2 is the hydraulic schematic diagram of the utility model embodiment.
Fig. 3 is the plan view of oil-feed valve component in Fig. 1.
Fig. 4 is the plan view of monolithic selector valve in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figures 1 to 4, this load-sensitive valve, comprise the oil-feed valve component 1 be connected, five selector valves 2, oil return valve body 3, every sheet selector valve 2 includes commutation valve body 21, filler opening 22, return opening 23, two actuator ports 24 and 25, meta pressure release oil circuit 26 and guiding valve 27, oil-feed valve component 1 comprises oil-feed valve body 11, be located at the filler opening 12 in oil-feed valve body 11, the one-way valve 13 be connected with filler opening 12, the three-way flowrate valve 5 be connected with filler opening 12 is also provided with in oil-feed valve body 11, three-way flowrate valve 5 comprises the valve seat 14 be fixedly arranged in oil-feed valve body 11, valve pocket 15 and spring seat 16, slide the spool 17 be located in valve pocket 15, be located at the spring 18 between spring seat 16 and spool 17, valve seat 14 is provided with the endoporus be connected with filler opening 12, the sealing surface that valve seat 14 coordinates with spool 17 is the conical surface, the oil inlet hole of three-way flowrate valve is the throttle orifice 10 being located at spool 17 front end, valve pocket 15 front end be provided with the oil back chamber 19 be connected with oil return valve body 3 between spool 17, two oil outlets 8 of three-way flowrate valve, 9 are located in spring seat 18 and in the valve pocket 15 at spool 17 rear respectively, safety valve 6 is provided with in the oil-feed valve body 11 at spring seat 16 rear, the return opening of safety valve 6 is connected with oil return valve body 3, oil-feed valve body 11 is provided with the relief hole 7 be connected with oil outlet 9, this relief hole 7 is connected with oil return valve body 3 after connecting with the meta pressure release oil circuit 26 of each selector valve 2 again, the filler opening 21 of each selector valve 2 is all connected with the oil drain out of described one-way valve 13, the return opening 23 of each selector valve 2 is all connected with oil return valve body 3, the guiding valve 27 that each selector valve 2 is corresponding with respective meta pressure release oil circuit 26 is equipped with throttling groove 28.
Working principle of the present utility model is:
When each selector valve 2 does not all work, come in oil-feed valve body 11 hydraulic oil a part spring chamber after the throttle orifice 10, spool 17 of spool 17 front end, the oil outlet 9 in valve pocket 15, relief hole 7, each selector valve 2 meta pressure release oil circuit 26 communicate with the return opening of oil return valve body 3, the spring chamber of three-way flowrate valve 5 is now in low-pressure state, spool 17 is open, another part hydraulic oil flows back to the return opening of oil return valve body 3 through oil back chamber 19, therefore oil-feed is in low pressure oil return state, and one-way valve 13 is closed; When selector valve 2 arbitrary in system works, its guiding valve 27 is mobile in commutation valve body 21, its throttling groove 28 is made to control the flow of meta pressure release oil circuit 26 descending gradually until final plant closure, such motion state makes the spring chamber pressure of three-way flowrate valve 5 progressively rise to system maximum pressure (this pressure is set up by safety valve 6) by 0 accordingly, be open along with spring chamber pressure increases one-way valve 13, in the process, as:
1. when the difference of the spring chamber pressure of the inlet pressure in oil-feed valve body 11 and three-way flowrate valve 5 is greater than the active force of spring 18, spool 17 is still in opening state, oil back chamber 19 communicates with filler opening 12, its aperture reduces gradually, three-way flowrate valve 5 is in SHUNT state, the hydraulic oil of shunting flows into oil return valve body 3, and shunt volume with guiding valve 27 movement travel increase from large to small, and corresponding each selector valve 2 obtains ascending flow;
2., when the difference of the spring chamber pressure of the inlet pressure in oil-feed valve body 11 and three-way flowrate valve 5 is less than or equal to the active force of spring 18, spool 17 is closed under spring force, and oil back chamber 19 is cut off, and each selector valve 2 obtains whole oil-feed flow;
Therefore, after understanding main computer boxes applying working condition, the damping value of Proper Match throttling spool hole 10 and guiding valve throttling groove 28 and the spring force of three-way flowrate valve 5, just can realize the ideal curve of actuator's flow with sliding valve movement stroke, namely realize load-sensitive function;
The utility model utilizes selector valve 2 existing meta pressure release oil circuit 26, guiding valve 27 is set up throttling groove 28, the damping value of Proper Match throttling spool hole 10 and guiding valve throttling groove 28 and the spring force of three-way flowrate valve 5 can realize load feedback and distribute controlling flow, its load pressure feedback oil circuit is comparatively simple, newly-increased control unit is few, have the advantage being easy to manufacture, cost is low, and each executive component is independent of each other, stable conditions, can ensure the normal operation of system.
Claims (2)
1. a load-sensitive valve, comprise the oil-feed valve component be connected, selector valve more than two panels, oil return valve body, oil-feed valve component comprises oil-feed valve body, be located at the filler opening in oil-feed valve body, the one-way valve be connected with filler opening, selector valve includes commutation valve body, filler opening, return opening, two actuator ports, meta pressure release oil circuit and guiding valve, it is characterized in that in oil-feed valve body, be also provided with the three-way flowrate valve be connected with filler opening, three-way flowrate valve comprises the valve seat be fixedly arranged in oil-feed valve body, valve pocket and spring seat, slide the spool be located in valve pocket, be located at the spring between spring seat and spool, valve seat is provided with the endoporus be connected with filler opening, the oil inlet hole of three-way flowrate valve is the throttle orifice being located at spool front end, valve pocket front end be provided with the oil back chamber be connected with oil return valve body between spool, two oil outlets of three-way flowrate valve are located in spring seat and in the valve pocket at spool rear respectively, safety valve is provided with in the oil-feed valve body at spring seat rear, the return opening of safety valve is connected with oil return valve body, oil-feed valve body is provided with the relief hole be connected with the oil outlet in valve pocket, this relief hole is connected with oil return valve body after connecting with the meta pressure release oil circuit of each selector valve, the filler opening of each selector valve is all connected with the oil drain out of described one-way valve, the return opening of each selector valve is all connected with oil return valve body, the guiding valve that each selector valve is corresponding with respective meta pressure release oil circuit is equipped with throttling groove.
2. a kind of load-sensitive valve as claimed in claim 1, is characterized in that the sealing surface that valve seat coordinates with spool is the conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520026874.4U CN204476902U (en) | 2015-01-15 | 2015-01-15 | A kind of load-sensitive valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520026874.4U CN204476902U (en) | 2015-01-15 | 2015-01-15 | A kind of load-sensitive valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204476902U true CN204476902U (en) | 2015-07-15 |
Family
ID=53632693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520026874.4U Withdrawn - After Issue CN204476902U (en) | 2015-01-15 | 2015-01-15 | A kind of load-sensitive valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204476902U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653536A (en) * | 2015-01-15 | 2015-05-27 | 四川长江液压件有限责任公司 | Load sensitive valve |
-
2015
- 2015-01-15 CN CN201520026874.4U patent/CN204476902U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653536A (en) * | 2015-01-15 | 2015-05-27 | 四川长江液压件有限责任公司 | Load sensitive valve |
| CN104653536B (en) * | 2015-01-15 | 2016-10-19 | 四川长江液压件有限责任公司 | A kind of load-sensitive valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150715 Effective date of abandoning: 20161012 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |