CN203627369U - Pressure compensation valve - Google Patents
Pressure compensation valve Download PDFInfo
- Publication number
- CN203627369U CN203627369U CN201320740484.4U CN201320740484U CN203627369U CN 203627369 U CN203627369 U CN 203627369U CN 201320740484 U CN201320740484 U CN 201320740484U CN 203627369 U CN203627369 U CN 203627369U
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- valve
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Abstract
The utility model discloses a pressure compensation valve which comprises a valve body, a valve sleeve fixedly installed on the valve body and a valve element, wherein the valve element is arranged in a valve hole in the valve body and can slide. The valve sleeve and the valve element are sequentially provided with a piston and a reset spring, the piston is arranged in an inner hole of the valve sleeve, the reset spring is arranged in a pressure cavity formed between the piston and the valve sleeve and acts with one transverse end face of the piston, a one-way valve capable of flowing towards an LS flow channel in a one-way mode is arranged in an oil inlet cavity of the valve body, and the valve element is used for connecting and blocking the oil inlet cavity and an oil outlet cavity. The pressure compensation valve changes pressure compensation characteristics, namely the effective pressure acting surface A1 of the piston is changed. To be specific, when the effective pressure acting surface A1 is increased, the force for pushing the piston in the blocking direction can be increased, and the pressure of the oil inlet cavity becomes larger so as to enable flowing of pressurized fluid to be difficult; when the effective acting surface A1 is reduced, and the pressurized fluid can flow easily. The pressure compensation valve is simple in structure and low in cost and increases the utilization rate of products.
Description
Technical field
The utility model relates to a kind of pressure-compensated valve for an oil hydraulic circuit, and this oil hydraulic circuit is for distributing the discharge pressurized liquid of one or more oil hydraulic pump of Work machine to supply with a kind of pressure-compensated valve of many breaks by flow rate.
Background technique
The pressurized liquid of supplying with certain discharge of an oil hydraulic pump as many breaks can complete as follows, configures multiple hydraulicdirectional control valves at oil hydraulic pump emission path, and supplies with pressurized liquid by switching hydraulicdirectional control valve to each actuator.While supplying with pressurized liquid in this while to multiple actuators, liquid is understood the preferentially actuator to low induced pressure, and therefore reduces or stop supplying with the actuator of high capacity.
The oil hydraulic circuit that solves this difficult problem is all to configure pressure-compensated valve between hydraulicdirectional control valve and actuator, detect highest load pressure, i.e. highest load pressure in all actuators, the highest load pressure detecting by handle puts on each pressure-compensated valve, thereby each hydraulicdirectional control valve outlet pressure is unanimously brought up to highest load pressure to be equated substantially, and making whereby each hydraulicdirectional control valve simultaneously when commutation work, the pressurized liquid commutating by each hydraulic pressure is proportional to the allotment ratio of their open area and supplies with each actuator.
The disclosed a kind of pressure-compensated valve of Chinese utility model patent CN1159849A, it comprises a valve, can set up and block a kind of connected relation between an import and an outlet; One pressure chamber; One piston, is driven and passed valve in blocking-up direction by the load pressure within described cavity volume; One intermediate pressure cavity volume, is communicated in import and in blocking-up direction, promotes described valve by pressure wherein via one first conduit; And a changeable pressure formula reduction valve, for a kind of pressure fluid among described intermediate pressure cavity being released into one second conduit via one second conduit.But the compensation characteristic that some actuators needs is also different, some recuperation valve has both safety check effect simultaneously, or does not have the pressure compensation of change characteristic energy, although or have both safety check and change compensation characteristic effect, structure is too complicated, cost is higher.
Model utility content
The purpose of this utility model is to solve the problem of above-mentioned existence, provides a kind of simple in structure, and low cost has both safety check and changes a kind of pressure-compensated valve of compensation characteristic effect.
The purpose of this utility model realizes as follows: a kind of pressure-compensated valve, comprise valve body, be fixedly mounted on the valve pocket of valve body, be arranged in valve opening on valve body and spool slidably, described valve pocket and spool are provided with piston and Returnning spring successively, described piston is placed on valve pocket endoporus, described Returnning spring is built in the pressure chamber forming between piston and valve pocket, one transversal end-acted and place an individual event valve that flows to only LS runner with one direction at the oil-feed cavity volume of valve body with piston, described spool connects to be set up and blocking-up oil-feed cavity volume and fuel-displaced cavity volume.
The both ends of the surface up and down of technique scheme spool equate with the cross section of the both ends of the surface up and down of piston, a load pressure Pls in described pressure chamber and action of reset spring are on piston upper-end surface, and driven plunger down sliding, and pass described spool in blocking-up oil-feed cavity volume and fuel-displaced cavity volume communication direction.
Described in technique scheme, spool one end is the round column structure sliding as guiding valve, and described cylindrical section has radial hole, for setting up and block being communicated with of oil-feed cavity volume and fuel-displaced cavity volume; Its other end is provided with conical surface groove, protrudes the pillar of a sphere on end face.
Described in technique scheme, oil-feed cavity volume below is provided with the port hole of individual event valve, described one-way valve detects highest load pressure Pls the one direction input LS passage between each oil-feed cavity volume pressure, during for height load variations, guarantees like clockwork the transmission of highest load pressure signal.
Technique scheme is in the time that the pressure of oil-feed cavity volume is more than or equal to highest load pressure Pls, and the pressure of described oil-feed cavity volume promotes spool by acting on spool upper-end surface, and oil-feed oil cavity volume is communicated with fuel-displaced cavity volume.
Described in technique scheme, the below of fuel-displaced cavity volume is provided with conical surface valve seat, on fuel-displaced cavity volume while apply piston lower end surface and spool upper-end surface, when the pressure of the pressure ratio oil-feed cavity volume of fuel-displaced cavity volume large, the pressure of fuel-displaced cavity volume promotes spool and moves downward, the conical surface groove of spool is close on the conical surface valve seat of valve body, forms safety check.
Described in technique scheme, valve body top has the valve opening for fixedly mounting valve pocket, and valve body also has the aperture for delivery of the pressure P ls of LS passage, has outer groove and inner groovy on described valve pocket, and opens radial hole between two grooves.
Described in technique scheme, on piston, have shoulder, on shoulder, have through hole, one end of described piston arranges fluted column, and on fluted column axis, perforate is communicated with through hole, its the other end is arranged to protrude small column, and described piston can slide at valve pocket endoporus after being placed into valve pocket.
Advantage of the present utility model: pressure-compensated valve of the present utility model changes pressure compensation characteristic, change the pressure useful effect face A1 of piston, as increase pressure useful effect face A1, promoting piston force on aspect blocking-up will increase, the pressure of oil-feed cavity volume becomes compared with making pressurized liquid be difficult to flow greatly, anyway, reduce useful effect face A1, pressurized liquid becomes easily and flows.This is simple in structure, and cost is lower, has improved product utilization rate.
Accompanying drawing explanation
For content of the present utility model is more easily expressly understood, according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is structural representation of the present utility model;
Reference character: 1, valve body, 2, valve pocket, 3, spool, 4, piston, 5, Returnning spring, 6, individual event valve, 7, LS runner, 0a, outer groove, 0b, inner groovy, 0c, pressure chamber, 2a, aperture, 3a, fluted column, 3b, through hole, 3c, small column, 3d, perforate, 4a, oil-feed cavity volume, 4b, passage sky, 4c, conical surface valve seat, 4d, fuel-displaced cavity volume, 4g, valve opening, 5a, pillar, 5b, radial hole, 5c, conical surface groove, A1, piston upper-end surface, A2, piston lower surface, A3, spool upper-end surface, A4, spool lower end surface.
Embodiment:
As shown in Figure 1, a kind of pressure-compensated valve, comprise valve body 1, be fixedly mounted on the valve pocket 2 of valve body 1, be arranged in valve opening 4e on valve body 1 and spool 3 slidably, valve pocket 2 is provided with piston 4 and Returnning spring 5 successively with spool 3, piston 4 is placed on valve pocket 2 endoporus, Returnning spring 5 is built on the pressure chamber 0c forming between piston 4 and valve pocket 2, one transversal end-acted and place an individual event valve 6 that flows to only LS runner 7 with one direction at the oil-feed cavity volume 4a of valve body 1 with piston 4, spool 3 connects to be set up and blocking-up oil-feed cavity volume 4a and fuel-displaced cavity volume 4d.Spool upper-end surface A3 and spool lower end surface A4 equate with the cross section of piston upper-end surface A1 and piston lower surface A2, pressure chamber 0c in a load pressure Pls and Returnning spring 5 act on the upper-end surface A1 of piston 4, and driven plunger 4 down slidings, and pass spool 3 in blocking-up oil-feed cavity volume 4a and fuel-displaced cavity volume 4d communication direction.
Above-described specific embodiment; the purpose of this utility model, technological scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. a pressure-compensated valve, comprise valve body (1), be fixedly mounted on the valve pocket (2) of valve body (1), be arranged in valve opening (4e) on valve body (1) and spool (3) slidably, described valve pocket (2) is provided with piston (4) and Returnning spring (5) successively with spool (3), described piston (4) is placed on valve pocket (2) endoporus, described Returnning spring (5) is built in the pressure chamber (0c) forming between piston (4) and valve pocket (2), one transversal end-acted with piston (4), and place an individual event valve (6) that flows to only LS runner (7) with one direction at the oil-feed cavity volume (4a) of valve body (1), described spool (3) connects to be set up and blocking-up oil-feed cavity volume (4a) and fuel-displaced cavity volume (4d).
2. a kind of pressure-compensated valve according to claim 1, it is characterized in that: the load pressure Pls in described pressure chamber (0c) and Returnning spring (5) act on piston upper-end surface (A1), and driven plunger (4) down sliding, and pass described spool (3) in blocking-up oil-feed cavity volume (4a) and fuel-displaced cavity volume (4d) communication direction.
3. a kind of pressure-compensated valve according to claim 1, it is characterized in that: described spool (3) one end is the round column structure sliding as guiding valve, cylindrical section has radial hole (5b), for setting up and blocking-up oil-feed cavity volume (4a) and being communicated with of fuel-displaced cavity volume (4d); Its other end is provided with conical surface groove (5c), protrudes the pillar (5a) of a sphere on end face.
4. a kind of pressure-compensated valve according to claim 3, it is characterized in that: described oil-feed cavity volume (4a) below is provided with the port hole (4b) of individual event valve (6), described one-way valve (6) detects highest load pressure Pls the one direction input LS passage (7) between each oil-feed cavity volume (4a) pressure, during for height load variations, guarantees like clockwork the transmission of highest load pressure signal.
5. a kind of pressure-compensated valve according to claim 4, it is characterized in that: in the time that the pressure of oil-feed cavity volume (4a) is more than or equal to highest load pressure Pls, the pressure of described oil-feed cavity volume (4a) promotes spool (3) by acting on spool upper-end surface (A3), and oil-feed oil cavity volume (4a) is communicated with fuel-displaced cavity volume (4d).
6. a kind of pressure-compensated valve according to claim 4, it is characterized in that: the below of described fuel-displaced cavity volume (4d) is provided with conical surface valve seat (4c), on fuel-displaced cavity volume (4d) while apply piston lower end surface (A2) and spool upper-end surface (A3), when the pressure of the pressure ratio oil-feed cavity volume (4a) of fuel-displaced cavity volume (4d) large, the pressure of fuel-displaced cavity volume (4d) promotes spool (3) and moves downward, the conical surface groove (5c) of spool (3) is close on the conical surface valve seat (4c) of valve body (1), forms safety check.
7. according to a kind of pressure-compensated valve described in claim 5 or 6, it is characterized in that: described valve body (1) top has the valve opening (4g) for fixedly mounting valve pocket (2), valve body (1) also has the aperture (2a) for delivery of the pressure P ls of LS passage (7), on described valve pocket (2), have outer groove (0a) and inner groovy (0b), and (0a) opens radial hole (2a) between two grooves.
8. a kind of pressure-compensated valve according to claim 7, it is characterized in that: on described piston (4), have shoulder (3e), on shoulder (3e), there is through hole (3b), one end of described piston (4) arranges fluted column (3a), on fluted column (3a) axis, perforate (3d) is communicated with through hole (3b), its the other end is arranged to protrude small column (3c), and described piston (3) can slide at valve pocket (2) endoporus after being placed into valve pocket (2).
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320740484.4U CN203627369U (en) | 2013-11-20 | 2013-11-20 | Pressure compensation valve |
| JP2015561879A JP6106292B2 (en) | 2013-11-20 | 2013-12-25 | Pressure compensation valve |
| PCT/CN2013/001644 WO2015074170A1 (en) | 2013-11-20 | 2013-12-25 | Pressure compensation valve |
| EP13898030.5A EP2944829A4 (en) | 2013-11-20 | 2013-12-25 | Pressure compensation valve |
| US14/818,332 US9745724B2 (en) | 2013-11-20 | 2015-08-05 | Pressure compensation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320740484.4U CN203627369U (en) | 2013-11-20 | 2013-11-20 | Pressure compensation valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203627369U true CN203627369U (en) | 2014-06-04 |
Family
ID=50813851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320740484.4U Withdrawn - After Issue CN203627369U (en) | 2013-11-20 | 2013-11-20 | Pressure compensation valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203627369U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235097A (en) * | 2013-11-20 | 2014-12-24 | 江苏恒立液压有限公司 | Pressure-compensating valve |
| CN104265715A (en) * | 2014-10-16 | 2015-01-07 | 江苏恒立液压有限公司 | Pressure compensating valve |
| CN104295549A (en) * | 2014-10-16 | 2015-01-21 | 江苏恒立液压有限公司 | Split type pressure compensation valve |
| CN105864471A (en) * | 2015-02-11 | 2016-08-17 | 胡斯可汽车控股有限公司 | Control valve with annular poppet check valve |
| CN107906231A (en) * | 2017-12-21 | 2018-04-13 | 宁波文泽机电技术开发有限公司 | A kind of plug-in one-way speed-regulating valve |
| CN110985471A (en) * | 2019-12-25 | 2020-04-10 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Safe air-proof hole integrated sliding valve |
| CN113389829A (en) * | 2021-06-10 | 2021-09-14 | 徐州徐工矿业机械有限公司 | Mining dump truck and brake automatic compensator, brake and braking method thereof |
-
2013
- 2013-11-20 CN CN201320740484.4U patent/CN203627369U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235097A (en) * | 2013-11-20 | 2014-12-24 | 江苏恒立液压有限公司 | Pressure-compensating valve |
| CN104235097B (en) * | 2013-11-20 | 2016-07-27 | 江苏恒立液压有限公司 | Pressure-compensated valve |
| CN104265715A (en) * | 2014-10-16 | 2015-01-07 | 江苏恒立液压有限公司 | Pressure compensating valve |
| CN104295549A (en) * | 2014-10-16 | 2015-01-21 | 江苏恒立液压有限公司 | Split type pressure compensation valve |
| CN105864471A (en) * | 2015-02-11 | 2016-08-17 | 胡斯可汽车控股有限公司 | Control valve with annular poppet check valve |
| CN107906231A (en) * | 2017-12-21 | 2018-04-13 | 宁波文泽机电技术开发有限公司 | A kind of plug-in one-way speed-regulating valve |
| CN107906231B (en) * | 2017-12-21 | 2019-07-02 | 山东禧龙石油装备有限公司 | A kind of plug-in one-way speed-regulating valve |
| CN110985471A (en) * | 2019-12-25 | 2020-04-10 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Safe air-proof hole integrated sliding valve |
| CN113389829A (en) * | 2021-06-10 | 2021-09-14 | 徐州徐工矿业机械有限公司 | Mining dump truck and brake automatic compensator, brake and braking method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 213167 Wujin high tech Industrial Development Zone, Jiangsu Province, No. long hidden Road, No. 99 Patentee after: JIANGSU HENGLI HYDRAULIC CO., LTD. Address before: 213167, No. 99, long hidden Road, Wujin hi tech Industrial Development Zone, Changzhou, Jiangsu, Changzhou Patentee before: JIANGSU HENGLI HYDRAULIC CO., LTD. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140604 Effective date of abandoning: 20160727 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |