CN102748452B - Pressure holding valve - Google Patents
Pressure holding valve Download PDFInfo
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- CN102748452B CN102748452B CN201210252668.6A CN201210252668A CN102748452B CN 102748452 B CN102748452 B CN 102748452B CN 201210252668 A CN201210252668 A CN 201210252668A CN 102748452 B CN102748452 B CN 102748452B
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- spool
- filler opening
- outlet
- pressure holding
- oil outlet
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Abstract
A kind of pressure holding valve for using in engineering mechanism torque-converters hydraulic system.Be characterized in that filler opening has clear opening, oil outlet is communicated with the sidewall of clear opening; Spool is barrel valve and coordinates with the clear opening of filler opening to form sliding valve structure, spool is towards filler opening one end indent, the wall of its indent has 1 to 6 cinclides, the other end of spool is connected with adjustable spring mechanism, and the elastic force of adjustable spring mechanism spool is pressed to the position closing oil inlet and outlet; Described cinclides spool be in compression elasticity move upward position be communicated with oil outlet, there is looping pit oil outlet and filler opening intersection, the diameter of looping pit is greater than the diameter of spool, at the outer wall looping passage of spool, passage during to ensure that transmission oil flows to oil outlet from filler opening is more unobstructed, improves fluid passing capacity.Its advantage keeps torque-converters outlet pressure, do not produce resistance during standard-sized sheet to hydraulic system, and structure is simple, and reliable performance is stablized.
Description
Technical field
The present invention relates to a kind of pressure holding valve for using in engineering mechanism torque-converters hydraulic system.
Background technique
Torque-converters inlet and outlet pressure is comparatively large to torque-converters performance impact, and the first, require that inlet/outlet has certain pressure reduction; The second, torque-converters internal pressure is too high can be out of shape, and even bursts.In torque-converters hydraulic system, generally have torque-converters inlet valve and pressure holding valve, torque-converters inlet valve is to protect torque-converters, avoids bursting in high pressure.Pressure holding valve ensures that torque-converters outlet exists required pressure always.
The pressure holding valve that current torque-converters hydraulic system uses has two kinds, and one is back pressure valve, and another kind is pressure holding valve.Back pressure valve can keep torque-converters outlet pressure within range of working pressure when flow rate of hydraulic system is less, but when flow rate of hydraulic system is larger, easily by the impact of radiator resistance, safety valve is revealed.Existing pressure holding valve, not only can keep torque-converters outlet pressure within range of working pressure when flow rate of hydraulic system is less, and at flow rate of hydraulic system during comparatively large or even standard-sized sheet, resistance is not produced to hydraulic system, and inlet valve leakage rate is less, but owing to affecting by outlet pressure, inlet pressure easily fluctuates, unstable properties, attachedly Figure 1 shows that existing pressure holding valve structure sectional view.
Therefore, existing field needs the pressure holding valve that a kind of structure is simple, reliable performance is stable.
Summary of the invention
Object of the present invention is just to provide one can keep torque-converters outlet pressure, does not produce resistance during standard-sized sheet to hydraulic system, and structure is simple, the pressure holding valve that reliable performance is stable.
Solution of the present invention is such: valve body has filler opening and oil outlet, and described filler opening has clear opening, and oil outlet is communicated with the sidewall of clear opening; Spool is barrel valve and coordinates with the clear opening of filler opening to form sliding valve structure, described spool is towards filler opening one end indent, the wall of its indent there is 1 to 6 cinclides, the other end of spool is connected with adjustable spring mechanism, and the elastic force of adjustable spring mechanism spool is pressed to the position closing oil inlet and outlet; Described cinclides spool be in compression elasticity move upward position be communicated with oil outlet.
When there is looping pit oil outlet and filler opening intersection, the diameter of described looping pit is greater than the diameter of spool, and at the outer wall looping passage of spool, passage during to ensure that transmission oil flows to oil outlet from filler opening is more unobstructed, improves fluid passing capacity.
Advantage of the present invention keeps torque-converters outlet pressure, do not produce resistance during standard-sized sheet to hydraulic system, and structure is simple, and reliable performance is stablized.
Accompanying drawing explanation
Accompanying drawing is embodiments of the invention.
Accompanying drawing 1 is existing pressure holding valve structural representation.
Accompanying drawing 2 is structural representations of the present invention.
Accompanying drawing 3 is A-A sectional views of accompanying drawing 2.
Accompanying drawing 4 is structural representations of spool 3.
Accompanying drawing 5 is B-B sectional views of accompanying drawing 4.
Accompanying drawing 6 is surface structure of the present invention and mounting structure.
Embodiment
The present embodiment comprises 1, valve body; 2, back-up ring; 3, spool; 4, spring; 5, O shape circle; 6, screw plug; 7, spacer.
In structure shown in accompanying drawing 2, its valve body has oil inlet P and oil outlet T, and described oil inlet P has clear opening, and oil outlet T is communicated with the sidewall of clear opening; Spool 3 is barrel valve and coordinates with the clear opening of oil inlet P to form sliding valve structure, described spool 3 is towards filler opening one end indent, the wall of its indent there is 1 to 6 cinclides, cinclides can be circular hole or square hole or polygonal hole, the present embodiment is the structure of employing four circular cinclides, as shown in accompanying drawing 2, accompanying drawing 4, accompanying drawing 5; The other end of spool 3 is connected with adjustable spring mechanism, and the elastic force of adjustable spring mechanism spool 3 is pressed to the position closing oil inlet and outlet; Described cinclides is in the compression elasticity position that moves upward at spool 3 and is communicated with oil outlet T.
Spool 3 can be straight-through unthreaded hole; Also can be step hole; Spool 3 shown in accompanying drawing 2 is straight-through unthreaded hole.Spool 3 by screw plug 6 and back-up ring about 2 spacing, or the step of screw plug 6 and valve body 1 lower end is spacing.
As shown in Figure 3, have looping pit B at oil outlet T and oil inlet P intersection, the diameter of described looping pit B is greater than the diameter of spool 3, in the outer wall looping channel C of spool 2.
As shown in Figure 2, the spring 4 that described adjustable spring mechanism comprises spool 3, one end is connected with spool 3 and the adjustment pad 7 be connected with spring 4 the other end, adjustment pad 7 connects screw plug 6, and cracking pressure is adjusted by spacer 7; Described spool 3 upper end is hollow inward recessed, and the hollow inner fovea part of spool 3 is connected with spring 4.
As shown in Figure 2, described valve body has pore D at spool 3 upper cavity place, and the outlet of described pore D is positioned at the same end face valve body side of oil inlet P mouth, and the air on spool 3 top communicates with air through 1 hole, ensures that spool is freely movable.
The present invention has two mounting holes, and valve is arranged on converter cover; Transmission oil is come in from body base oil inlet P, spool 3 and valve body are sealed by cylndrical surface, pressure oil overcomes spring 4 pressure, the air in valve core spring chamber communicates with air through pore D, spool 3 moves upward, four apertures of transmission oil on spool, flow to valve body annular pass B, finally arrive valve oil outlet T.When flow rate of hydraulic system is less, valve core opening is very little, works the effect of damming, and ensures that torque-converters outlet pressure reaches design load; When flow rate of hydraulic system is larger, the back pressure at oil outlet T mouth place raises, and spool standard-sized sheet, does not produce resistance to hydraulic system, improves fluid passing capacity.
In the present embodiment, cracking pressure is adjustable, and scope is: 0.15 ~ 0.5 ± 0.05MPa.
Claims (6)
1. a pressure holding valve, its valve body has filler opening (P) and oil outlet (T), and described filler opening (P) has clear opening, and oil outlet (T) is communicated with the sidewall of clear opening; Spool (3) coordinates for barrel valve and with the clear opening of filler opening (P) and forms sliding valve structure, it is characterized in that: described spool (3) is towards filler opening one end indent, the wall of its indent there is 1 to 6 cinclides, the other end of spool (3) is connected with adjustable spring mechanism, and the elastic force of adjustable spring mechanism spool (3) is pressed to the position closing oil inlet and outlet; Described cinclides spool (3) be in compression elasticity move upward position be communicated with oil outlet (T).
2. pressure holding valve according to claim 1, it is characterized in that there is looping pit (B) in oil outlet (T) and filler opening (P) intersection, the diameter of described looping pit (B) is greater than the diameter of spool (3), at the outer wall looping passage (C) of spool (3).
3. pressure holding valve according to claim 1, it is characterized in that described adjustable spring mechanism comprises the spring (4) that one end is connected with spool (3) and the adjustment pad (7) be connected with spring (4) the other end, adjustment pad (7) connects screw plug (6).
4. the pressure holding valve according to claim 1 or 2 or 3, it is characterized in that described spool (3) upper end is hollow inward recessed, the hollow inner fovea part of spool (3) is connected with spring (4).
5. pressure holding valve according to claim 1, is characterized in that described valve body has pore (D) at spool (3) upper cavity place, and the outlet of described pore (D) is positioned at the valve body side of the same end face of filler opening (P) mouth.
6. the pressure holding valve according to claim 1 or 2 or 3, is characterized in that described spool (3) can be straight-through unthreaded hole or step hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210252668.6A CN102748452B (en) | 2012-07-20 | 2012-07-20 | Pressure holding valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210252668.6A CN102748452B (en) | 2012-07-20 | 2012-07-20 | Pressure holding valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102748452A CN102748452A (en) | 2012-10-24 |
| CN102748452B true CN102748452B (en) | 2015-11-11 |
Family
ID=47028860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210252668.6A Active CN102748452B (en) | 2012-07-20 | 2012-07-20 | Pressure holding valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102748452B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506117A (en) * | 2018-11-26 | 2019-03-22 | 珠海格力电器股份有限公司 | Delivery valve and compressor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2071733U (en) * | 1990-04-20 | 1991-02-20 | 北京海淀同力机械电子研究所 | Valve by use of new runner and sealing structure |
| GB2467988A (en) * | 2009-02-20 | 2010-08-25 | Qingjun Xie | Mixing valve |
| EP2256385A2 (en) * | 2009-05-21 | 2010-12-01 | Dong-II Machinery Co. Ltd. | One-Way valve of variable capacity compressor for vehicle |
| CN102200148A (en) * | 2011-07-01 | 2011-09-28 | 宁波市恒通液压科技有限公司 | Buffer valve |
| CN202158026U (en) * | 2011-07-01 | 2012-03-07 | 宁波市恒通液压科技有限公司 | Balance valve |
-
2012
- 2012-07-20 CN CN201210252668.6A patent/CN102748452B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2071733U (en) * | 1990-04-20 | 1991-02-20 | 北京海淀同力机械电子研究所 | Valve by use of new runner and sealing structure |
| GB2467988A (en) * | 2009-02-20 | 2010-08-25 | Qingjun Xie | Mixing valve |
| EP2256385A2 (en) * | 2009-05-21 | 2010-12-01 | Dong-II Machinery Co. Ltd. | One-Way valve of variable capacity compressor for vehicle |
| CN102200148A (en) * | 2011-07-01 | 2011-09-28 | 宁波市恒通液压科技有限公司 | Buffer valve |
| CN202158026U (en) * | 2011-07-01 | 2012-03-07 | 宁波市恒通液压科技有限公司 | Balance valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102748452A (en) | 2012-10-24 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20170629 Address after: 545006 the Guangxi Zhuang Autonomous Region Liuzhou City Liu Tai Road No. 1 Patentee after: Liugong Liuzhou transmission parts Co., Ltd. Address before: 545006 the Guangxi Zhuang Autonomous Region Liuzhou City Liu Tai Road No. 1 Patentee before: Guangxi Liugong Machinery Co., Ltd. |