CN103452932B - A kind of pressure equalizing valve - Google Patents
A kind of pressure equalizing valve Download PDFInfo
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- CN103452932B CN103452932B CN201310336282.8A CN201310336282A CN103452932B CN 103452932 B CN103452932 B CN 103452932B CN 201310336282 A CN201310336282 A CN 201310336282A CN 103452932 B CN103452932 B CN 103452932B
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Abstract
The invention discloses a kind of pressure equalizing valve, it comprises valve pocket (1), spool A(2) and cover plate (3), spool A(2) in steel ball (5) and spool B(6 are installed), pump chamber A(15) be communicated with runner A(12), import B(9) be communicated with pump chamber B(16), valve pocket (1) between booster cavity (17) with pressure-releasing chamber (18) is provided with the transformation import (20) being communicated with and controlling oil duct (13), fuel tank oil duct (14) is communicated with pressure relief vent (21), shuttle valve admission chamber (19) is communicated with runner A(12), control oil pocket (23) and be communicated with control oil duct (13), pump chamber B(16) be communicated with shuttle valve chamber (24), valve pocket B is communicated with feed liquor runner B(26), shuttle valve chamber (24) is communicated with booster cavity (17).The invention has the beneficial effects as follows: two pumps are controlled by same control oil, high conformity; Simplify the structure, saved cost; Ensure that the total output of two pumps controls well.
Description
Technical field
The present invention relates to technical field of hydraulic, particularly a kind of pressure equalizing valve.
Background technique
Hydraulic transmission is compared with traditional mechanical transmission, there is the series of advantages such as transmission power is large, regulable control convenience, stable drive, speed adjustable range are wide, at modern mechanical particularly construction machinery industry, use hydraulic transmission more and more widely, and oil hydraulic pump is as the core parts of hydraulic system, the height of its technical merit and performance, decides overall performance and the quality of main frame to a great extent, in Modern hydraulic transmission, during plunger pump, use one of the widest Hydraulic power units.
In the control of hydraulic variable flow plunger pump, when relating to two pumps for realizing total output control employing cross-over control, two pumps is generally needed respectively outlet pressure oil to be guided to another pump, the pressure oil attracted from an other pump acts on the valve of this pump, by some specially designed structures, complete the control to pump together with this delivery side of pump pressure oil, this mode two pumps all must have the cross-over control mechanism of a set of complexity, and this mode is difficult to accomplish that two pumps is consistent.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, provide simple, cost-saving, the fine guarantee two pumps of a kind of structure conforming pressure equalizing valve.
Object of the present invention is achieved through the following technical solutions: a kind of pressure equalizing valve, it comprises valve pocket, spool A and cover plate, spool A has the miner diameter end and bigger diameter end that connect successively, and the area of miner diameter end end face equals the area of bigger diameter end and miner diameter end joint annular table terrace, the valve pocket A of one end open is provided with in valve pocket, spool A is arranged in valve pocket A, the inwall of valve pocket A is the stepped shape matched with the outer wall of spool A, cover plate is installed on the opening end of valve pocket A, and seal valve pocket A opening, the bigger diameter end of spool A is provided with open-ended valve pocket B, steel ball and spool B are installed in valve pocket B successively, the opening end of valve pocket B is provided with the screw of sealing valve pocket B,
Valve pocket is provided with import A, import B, control oil export, fuel tank connection mouth, connect the runner A of import A, control oil duct and the fuel tank oil duct being connected fuel tank connection mouth of connection control oil export, pump chamber A is formed between the end face of the miner diameter end of spool A and the end face of valve pocket A, pump chamber A is by being arranged at the flow passage runner A on valve pocket, pump chamber B is formed between the annular table terrace of spool A and the step surface of valve pocket A, import B is by being arranged at the flow passage pump chamber B on valve pocket, the bigger diameter end of spool A is provided with three annular grooves vertically, the inwall of three annular grooves and valve pocket forms booster cavity successively, pressure-releasing chamber and shuttle valve admission chamber, valve pocket internal surface between booster cavity with pressure-releasing chamber is provided with the transformation import being communicated with and controlling oil duct, the valve pocket internal surface being positioned at pressure-releasing chamber is provided with the pressure relief vent being communicated with fuel tank oil duct, the valve pocket internal surface being positioned at shuttle valve admission chamber is provided with the shuttle valve liquid entering hole being communicated with runner A, formation control oil pocket between the end face of the bigger diameter end of spool A and cover plate, control oil pocket and control oil duct by the flow passage be arranged on valve pocket,
Shuttle valve chamber is formed between the end face of spool A and the end face of valve pocket B, spool A is provided with the feed liquor runner A being communicated with pump chamber B and shuttle valve chamber, the end that feed liquor runner A is positioned at the one end in shuttle valve chamber is provided with ball valve seat, be positioned at spool B and the spool A between screw be provided with the feed liquor runner B being communicated with valve pocket B, spool B is provided with axial hole, the end that axial hole is positioned at the one end in shuttle valve chamber is provided with ball valve seat, spool B is also provided with the supercharging runner being communicated with shuttle valve chamber and booster cavity.
Described cover plate stretches between the outer wall of the part of valve pocket A and the inwall of valve pocket and is provided with O RunddichtringO A, is provided with O RunddichtringO B between cover plate and the end face of valve pocket.
The present invention has the following advantages:
Structure of the present invention is simple, self-adjusting ability is strong, stable, remain that the pilot pressure of two pumps is the mean value of the outlet pressure of two pumps, compare existing control set for adjusting, simplify apparatus structure, reduce cost, improve the stability of regulation and control, reduce regulation and control difficulty.
The present invention's control valve that after being introduced by two delivery side of pump pressure oils, direct output control oil content does not enter two pumps controls two pumps.Because two pumps are all controlled by same control oil, ensure that two pump have good conformity.And need not every Tai Bengdoudai cross-over control mechanism, enormously simplify structure, save cost.In addition, adopt the control oil of middle pressure oil as two pumps of two pumps, ensure that the total output of two pumps controls well.
Adopt this pressure equalizing valve to carry out alternative original cross-over control mode and reach good effect, both optimized the mechanism of pump, saved cost, the conformity of two pumps and good total output control effects can be ensured again very well.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention
Fig. 2 is the sectional view of Fig. 1 along A-A cross section
Fig. 3 is theory structure schematic diagram of the present invention
In figure, 1 valve pocket-, 2-spool A, 3-cover plate, 4-annular table terrace, 5-steel ball, 6-spool B, 7-screw, 8-import A, 9-import B, 10-controls oil export, 11-fuel tank connection mouth, 12-runner A, 13-controls oil duct, 14-fuel tank oil duct, 15-pump chamber A, 16-pump chamber B, 17-booster cavity, 18-pressure-releasing chamber, 19-shuttle valve admission chamber, the import of 20-transformation, 21-pressure relief vent, 22-shuttle valve liquid entering hole, 23-controls oil pocket, 24-shuttle valve chamber, 25-feed liquor runner A, 26-feed liquor runner B, 27-axial hole, 28-supercharging runner, 29-O RunddichtringO A, 30-O RunddichtringO B.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, and protection scope of the present invention is not limited to the following stated:
As Fig. 1, shown in Fig. 2, a kind of pressure equalizing valve, it comprises valve pocket 1, spool A2 and cover plate 3, spool A2 has the miner diameter end and bigger diameter end that connect successively, and the area of miner diameter end end face equals the area of bigger diameter end and miner diameter end joint annular table terrace 4, the valve pocket A of one end open is provided with in valve pocket 1, spool A2 is arranged in valve pocket A, the inwall of valve pocket A is the stepped shape matched with the outer wall of spool A2, cover plate 3 is installed on the opening end of valve pocket A, and seal valve pocket A opening, the bigger diameter end of spool A2 is provided with open-ended valve pocket B, steel ball 5 and spool B6 are installed in valve pocket B successively, spool B6 is connected with spool A2 by screw thread, the opening end of valve pocket B is provided with the screw 7 of sealing valve pocket B,
Valve pocket 1 is provided with import A8, import B9, control oil export 10, fuel tank connection mouth 11, connect the runner A12 of import A8, control oil duct 13 and the fuel tank oil duct 14 being connected fuel tank connection mouth 11 of connection control oil export 10, pump chamber A15 is formed between the end face of the miner diameter end of spool A2 and the end face of valve pocket A, pump chamber A15 is by being arranged at the flow passage runner A12 on valve pocket 1, pump chamber B16 is formed between the annular table terrace 4 of spool A2 and the step surface of valve pocket A, import B9 is by being arranged at the flow passage pump chamber B16 on valve pocket 1, the bigger diameter end of spool A2 is provided with three annular grooves vertically, the inwall of three annular grooves and valve pocket 1 forms booster cavity 17 successively, pressure-releasing chamber 18 and shuttle valve admission chamber 19, valve pocket 1 internal surface between booster cavity 17 with pressure-releasing chamber 18 is provided with the transformation import 20 being communicated with and controlling oil duct 13, valve pocket 1 internal surface being positioned at pressure-releasing chamber 18 is provided with the pressure relief vent 21 being communicated with fuel tank oil duct 14, valve pocket 1 internal surface being positioned at shuttle valve admission chamber 19 is provided with the shuttle valve liquid entering hole 22 being communicated with runner A12, formation control oil pocket 23 between the end face of the bigger diameter end of spool A2 and cover plate 3, control oil pocket 23 and control oil duct 13 by the flow passage be arranged on valve pocket 1,
Shuttle valve chamber 24 is formed between the end face of spool A2 and the end face of valve pocket B, spool A2 is provided with the feed liquor runner A25 being communicated with pump chamber B16 and shuttle valve chamber 24, the end that feed liquor runner A25 is positioned at the one end in shuttle valve chamber 24 is provided with ball valve seat, be positioned at the feed liquor runner B26 spool A2 between spool B6 with screw 7 being provided with and being communicated with valve pocket B, spool B6 is provided with axial hole 27, axial hole 27 is communicated with shuttle valve chamber 24 and valve pocket B, the end that axial hole 27 is positioned at the one end in shuttle valve chamber 24 is provided with ball valve seat, the shaft axis that axial hole 27 is positioned at the one end in shuttle valve chamber 24 with feed liquor runner A25 overlaps, spool B6 is also provided with the supercharging runner 28 being communicated with shuttle valve chamber 24 and booster cavity 17.
Described cover plate 3 stretches between the outer wall of the part of valve pocket A and the inwall of valve pocket 1 and is provided with O RunddichtringO A29, is provided with O RunddichtringO B30 between the end face of cover plate 3 and valve pocket 1.
Working procedure of the present invention is as follows: import A8 and import B9 connects with the outlet pressure of pump A and the outlet pressure of pump B respectively, controls the control port connection of oil export 10 and pump, fuel tank connection mouth 11 is connected with fuel tank.Shown in composition graphs 3, P1 is the outlet pressure of pump A, P2 is the outlet pressure of pump B, P is the pilot pressure of two pumps, the end face diameter of the miner diameter end of spool A2 is d, area is S1, and the end face diameter of the bigger diameter end of spool A2 is D, area is S, and the area of the annular table terrace 4 of spool A2 is S2, S1=S2, i.e. d
2=D
2-d
2, because of S1+ S2=S, S1=S2, so S1=S2=S/2, spool A2 left-right balance be ensured, then have: P*S=P1*S1+P2*S2,
P*S=P1*S/2+P2*S/2，
P*S=(P1+P2)*S/2，
P=(P1+P2)/2；
The pilot pressure this ensures that thering two pumps is the mean value of two pump discharge pressures.
Composition graphs 1, Fig. 2, Fig. 3, as P< (P1+P2)/2, spool A2 moves to right, control oil duct 13 to be connected by transformation import 20 and booster cavity 17, and under the extruding of steel ball 5 side that pressure is higher in pump A and pump B, another feed pathway of packing, thus booster cavity 17 delivery side of pump higher with pressure is connected, namely the delivery side of pump pressure controlling oil duct 13 higher with pressure in pressure pump A and pump B is connected, control-oil pressure raises, as P > (P1+P2)/2, spool A2 moves to left, control oil duct 13 to be connected by transformation import 20 and pressure-releasing chamber 18, and then connected by pressure-releasing chamber 18 and fuel tank, thus control-oil pressure reduces.In order to ensure this in balance, spool A2 is constantly adjustment in valve pocket 1, makes dither, and the dither revised by this continuous adjustment ensures P=(P1+P2)/2.
Claims (2)
1. a pressure equalizing valve, it is characterized in that: it comprises valve pocket (1), spool A(2) and cover plate (3), spool A(2) there is the miner diameter end and bigger diameter end that connect successively, and the area of miner diameter end end face equals the area of bigger diameter end and miner diameter end joint annular table terrace (4), the valve pocket A of one end open is provided with in valve pocket (1), spool A(2) be arranged in valve pocket A, the inwall of valve pocket A is and spool A(2) the stepped shape that matches of outer wall, cover plate (3) is installed on the opening end of valve pocket A, and seal valve pocket A opening, spool A(2) bigger diameter end be provided with open-ended valve pocket B, steel ball (5) and spool B(6 are installed successively) in valve pocket B, the opening end of valve pocket B is provided with the screw (7) of sealing valve pocket B,
(1) is provided with import A(8 to valve pocket), import B(9), control oil export (10), fuel tank connection mouth (11), connect import A(8) runner A(12), control oil duct (13) and the fuel tank oil duct (14) being connected fuel tank connection mouth (11) of connection control oil export (10), spool A(2) the end face of miner diameter end and the end face of valve pocket A between form pump chamber A(15), pump chamber A(15) by being arranged at the flow passage runner A(12 on valve pocket (1)), spool A(2) annular table terrace (4) and valve pocket A step surface between form pump chamber B(16), import B(9) by being arranged at the flow passage pump chamber B(16 on valve pocket (1)), spool A(2) bigger diameter end be provided with three annular grooves vertically, the inwall of three annular grooves and valve pocket (1) forms booster cavity (17) successively, pressure-releasing chamber (18) and shuttle valve admission chamber (19), valve pocket (1) internal surface be positioned between booster cavity (17) with pressure-releasing chamber (18) is provided with the transformation import (20) being communicated with and controlling oil duct (13), valve pocket (1) internal surface being positioned at pressure-releasing chamber (18) is provided with the pressure relief vent (21) being communicated with fuel tank oil duct (14), valve pocket (1) internal surface being positioned at shuttle valve admission chamber (19) is provided with and is communicated with runner A(12) shuttle valve liquid entering hole (22), spool A(2) the end face of bigger diameter end and cover plate (3) between formation control oil pocket (23), control oil pocket (23) and control oil duct (13) by the flow passage be arranged on valve pocket (1),
Spool A(2) end face and valve pocket B end face between form shuttle valve chamber (24), spool A(2) on be provided be communicated with pump chamber B(16) and the feed liquor runner A(25 of shuttle valve chamber (24)), feed liquor runner A(25) end that is positioned at the one end in shuttle valve chamber (24) is provided with ball valve seat, be positioned at spool B(6) with the spool A(2 between screw (7)) on be provided with the feed liquor runner B(26 being communicated with valve pocket B), spool B(6) be provided with axial hole (27), the end that axial hole (27) is positioned at the one end in shuttle valve chamber (24) is provided with ball valve seat, spool B(6) on be also provided with and be communicated with shuttle valve chamber (24) and the supercharging runner (28) of booster cavity (17).
2. a kind of pressure equalizing valve according to claim 1, it is characterized in that: described cover plate (3) stretches between the outer wall of the part of valve pocket A and the inwall of valve pocket (1) and is provided with O RunddichtringO A(29), be provided with O RunddichtringO B(30 between the end face of cover plate (3) and valve pocket (1)).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310336282.8A CN103452932B (en) | 2013-08-05 | 2013-08-05 | A kind of pressure equalizing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310336282.8A CN103452932B (en) | 2013-08-05 | 2013-08-05 | A kind of pressure equalizing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103452932A CN103452932A (en) | 2013-12-18 |
| CN103452932B true CN103452932B (en) | 2015-10-14 |
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ID=49735659
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310336282.8A Active CN103452932B (en) | 2013-08-05 | 2013-08-05 | A kind of pressure equalizing valve |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412864A (en) * | 2021-12-31 | 2022-04-29 | 潍柴动力股份有限公司 | Shuttle valve structure and operation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1423785A (en) * | 1972-07-04 | 1976-02-04 | Deere & Co | Automatic valve systems |
| US3939859A (en) * | 1973-02-13 | 1976-02-24 | Aisin Seiki Kabushiki Kaisha | Unloader valve with flow divider |
| CN200978845Y (en) * | 2006-11-13 | 2007-11-21 | 贵州枫阳液压有限责任公司 | Oil supply valve |
| CN102011758A (en) * | 2009-09-04 | 2011-04-13 | 佛山市顺德区中意液压有限公司 | Oil distributor for double-row radial ten-piston motor |
| CN102108984A (en) * | 2009-12-24 | 2011-06-29 | 斗山英维高株式会社 | Valve for controlling hydraulic pump of construction machinery |
| CN203394914U (en) * | 2013-08-05 | 2014-01-15 | 四川省宜宾普什驱动有限责任公司 | Pressure equalizing valve |
-
2013
- 2013-08-05 CN CN201310336282.8A patent/CN103452932B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1423785A (en) * | 1972-07-04 | 1976-02-04 | Deere & Co | Automatic valve systems |
| US3939859A (en) * | 1973-02-13 | 1976-02-24 | Aisin Seiki Kabushiki Kaisha | Unloader valve with flow divider |
| CN200978845Y (en) * | 2006-11-13 | 2007-11-21 | 贵州枫阳液压有限责任公司 | Oil supply valve |
| CN102011758A (en) * | 2009-09-04 | 2011-04-13 | 佛山市顺德区中意液压有限公司 | Oil distributor for double-row radial ten-piston motor |
| CN102108984A (en) * | 2009-12-24 | 2011-06-29 | 斗山英维高株式会社 | Valve for controlling hydraulic pump of construction machinery |
| CN203394914U (en) * | 2013-08-05 | 2014-01-15 | 四川省宜宾普什驱动有限责任公司 | Pressure equalizing valve |
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| Publication number | Publication date |
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| CN103452932A (en) | 2013-12-18 |
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