CN208138228U - Low leakage low-frictional force texture type hydraulic efficiency slide valve - Google Patents
Low leakage low-frictional force texture type hydraulic efficiency slide valve Download PDFInfo
- Publication number
- CN208138228U CN208138228U CN201721401005.0U CN201721401005U CN208138228U CN 208138228 U CN208138228 U CN 208138228U CN 201721401005 U CN201721401005 U CN 201721401005U CN 208138228 U CN208138228 U CN 208138228U
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- Prior art keywords
- spool
- low
- low power
- valve
- frictional force
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- Multiple-Way Valves (AREA)
- Sliding Valves (AREA)
Abstract
The utility model discloses a kind of low leakage low-frictional force texture type hydraulic efficiency slide valves, spool including valve pocket and in the valve pocket, spool, which is equipped with, cooperatively forms the secondary spool convex shoulder of friction with the valve pocket inner surface, spool convex shoulder outer surface is axially evenly distributed with the very low power of several annulars along the spool, the width of the very low power is 100~300 μm, depth is 4~8 μm, and the spacing between the adjacent very low power is 1.6~2.0mm.The utility model processes very low power in valve core of the spool valve outer circle working surface, when hydraulic oil enters slide valve secondary sealing region, air pocket can be generated in very low power, so that liquid fluid line is bent, the liquid fluid line at very low power is slightly convex, reduce the power of Radial Flow, therefore available lesser leakage rate, the utility model have frictional behaviour good, long service life, it is widely applicable, the advantages such as leakage rate is low.
Description
Technical field
The utility model relates to hydraulic efficiency slide valves, in particular to a kind of low leakage low-frictional force texture type hydraulic efficiency slide valve.
Background technique
Hydraulic valve is the control element in hydraulic system, for controlling the pressure of fluid, flow and stream in hydraulic system
Dynamic direction, is one of vital component in hydraulic system.Slide valve because its switching action is rapid, it is accurate the advantages that in hydraulic pressure system
It is used widely in system, therefore, more stringent requirements are proposed to the working performance of slide valve and service life etc. for hydraulic system.Valve
Core and valve pocket are a pair of crucial friction pairs in slide valve, improve its frictional behaviour, are had for the performance and service life that improve slide valve
Extremely important meaning.It in existing technology, is the frictional behaviour for improving spool and valve pocket, what is generallyd use is in spool valve
The method that core outer circle working surface processes balancing slit, the slide valve of this structure have the following disadvantages：1) hydraulic efficiency slide valve spool
On increase balancing slit will lead to slide valve slot leakage amount increase；2) fluid velocity of balancing slit spool wall surface is larger and flow field in
Particle residence time is uneven in valve core length directional spreding, and balancing slit spool is caused to have biggish erosion of wall amount and spool
Abrasion is uneven in the longitudinal direction, easily forms circular cone annular gap after abrasion and hydraulic lock phenomenon occurs；3) spool is opened
Although indent can be reduced the radial imbalance force that spool is subject to, but very to the improvement of spool wall friction power and oil film bearing capacity
It is small.
Summary of the invention
The purpose of this utility model seeks to provide a kind of low leakage low-frictional force texture type hydraulic efficiency slide valve, the hydraulic efficiency slide valve
Leakage rate is small, abrasion is small, long service life.
To achieve the above object, the technical solution adopted in the utility model is：A kind of low leakage low-frictional force texture type liquid
Slide valve, the spool including valve pocket and in the valve pocket are pressed, spool, which is equipped with, cooperatively forms friction with the valve pocket inner surface
Secondary spool convex shoulder, spool convex shoulder outer surface are axially evenly distributed with the very low power of several annulars, the very low power along the spool
Width be 100~300 μm, depth is 4~8 μm, and the spacing between the adjacent very low power is 1.6~2.0mm.
Further, the very low power originates in away from the spool convex shoulder 0.8~1.0mm of end face.
Further, the very low power cross section is in rectangular aperture channel-shaped.
Further, plane where the very low power is vertical with the axis of the spool.
Further, the spool is cylindrical and outer wall is equipped with annular spool groove；The valve pocket is cylindrical,
And inner wall is equipped with the valve pocket groove of annular.
Compared with prior art, the utility model has the following advantages that：
1) the utility model is machined with rectangle texture very low power in valve core of the spool valve outer circle working surface, and hydraulic oil enters slide valve
When secondary sealing region, air pocket can be generated in very low power, liquid fluid line is made to bend, the liquid fluid line at very low power is slightly convex,
Reduce the power of Radial Flow, therefore available lesser leakage rate.
2) the utility model is machined with very low power in valve core of the spool valve outer circle working surface, takes fluid in spool flow field
Band particle residence time between each very low power is not grown, and the flowing of particle is relatively uniform, and Particle distribution is also relatively uniform,
Grain is not susceptible to deposit, therefore the abrasion distribution of very low power spool is relatively uniform, and abrasion loss is smaller, and very low power is not easy by particle
Blocking, can effectively avoid clamping phenomenon and reduce abrasion, extend the service life of spool.
3) the utility model is machined with rectangle texture very low power in valve core of the spool valve outer circle working surface, with existing balancing slit
Structure compares, and the average boundary shear stress of very low power spool is smaller, therefore has the spool of rectangle texture very low power during exercise
Wall friction power it is smaller.
4) the utility model provides a kind of low leakage low-frictional force texture type hydraulic efficiency slide valve, has frictional behaviour good, makes
It is long with the service life, widely applicable, the advantages such as leakage rate is low.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of low leakage low-frictional force texture type hydraulic efficiency slide valve.
Fig. 2 is the partial enlargement structural representation in Fig. 1 at very low power.
Fig. 3 is the part section enlarged structure schematic diagram in Fig. 1 at very low power.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing, convenient for more clearly understanding that this is practical new
Type, but they do not constitute the utility model and limit.
The low leakage low-frictional force texture type hydraulic efficiency slide valve of one kind as shown in Fig.1 and Fig.2, can be used as bi-bit bi-pass reversal valve,
Spool 2 including valve pocket 1 and in valve pocket 1, spool 2 are the step slide valves for being machined with spool groove 2-3 on the cylinder
Spool；Valve pocket 1 is cylindrical, and inner wall is equipped with the valve pocket groove 1-1 of annular, and the radial clearance 3 in friction pair is uniform, along spool
2 it is substantially symmetrical about its central axis.Spool 2, which is equipped with, cooperatively forms the secondary spool convex shoulder 2-1, spool convex shoulder 2-1 of friction with 1 inner surface of valve pocket
Along the very low power 2-2 of the axial uniformly distributed several annulars of spool 2, it is a kind of that very low power 2-2, which is square surface texture very low power, for outer surface
Nanoscale annular groove, the cross section very low power 2-2 are in rectangular aperture channel-shaped, and the axis of plane and spool 2 where very low power 2-2 hangs down
Directly, the width of very low power 2-2 is 100~300 μm, and depth is 4~8 μm, and the spacing between adjacent two very low power is 1.6~2.0mm,
Very low power 2-2 originates in away from spool convex shoulder 2-1 0.8~1.0mm of end face, i.e.,：First very low power 2-2 is away from spool convex shoulder 2-1
End face distance L is 0.8~1.0mm (as shown in Figure 3).
The working principle and the course of work of the utility model are as follows：The utility model in spool convex shoulder outer surface by processing
The rectangle very low power of certain size and arrangement is provided to reach and significantly improve the friction and wear behavior of slide valve surface of friction pair simultaneously
The purpose prolonged its service life.Spool-type valves rely on the relative motion of spool and valve pocket at work to switch hydraulic oil
Direction, when valve core movement, liquid flows through the gap of spool and valve opening, slide valve pair flow field can be seen as Solid-fluid Two-phase Flow, by
In the presence of lubricating oil film, the friction between spool and valve pocket is fluid friction.The very low power energy of spool face when valve core movement
The Radial Flow for hindering hydraulic oil, to reduce leakage rate；The pressure oil on same circumference everywhere is set to communicate with each other simultaneously,
It enables center spool position, reduces frictional force and hydraulic card clamping force；And very low power structure is not easy by the particle blocking in fluid, energy
Subtract less granular residence time and deposition, reduces abrasion loss and dustiness, effectively extend the service life of spool.Therefore, originally
The advantages such as utility model has frictional behaviour good, long service life, and leakage rate is low.
Claims (4)
1. a kind of low leakage low-frictional force texture type hydraulic efficiency slide valve, including valve pocket (1) and the spool being located in the valve pocket (1)
(2), spool (2), which is equipped with, cooperatively forms the secondary spool convex shoulder (2-1) of friction with the valve pocket (1) inner surface, it is characterised in that：
The spool convex shoulder outer surface (2-1) is axially evenly distributed with the very low power (2-2) of several annulars, the very low power along the spool (2)
The width of (2-2) is 100~300 μm, and depth is 4~8 μm, and the spacing between the adjacent very low power is 1.6~2.0mm.
2. low leakage low-frictional force texture type hydraulic efficiency slide valve according to claim 1, it is characterised in that：Very low power (the 2-
2) originate in away from spool convex shoulder (2-1) 0.8~1.0mm of end face.
3. low leakage low-frictional force texture type hydraulic efficiency slide valve according to claim 1 or claim 2, it is characterised in that：The very low power
The cross section (2-2) is in rectangular aperture channel-shaped.
4. low leakage low-frictional force texture type hydraulic efficiency slide valve according to claim 1 or claim 2, it is characterised in that：The spool (2)
Cylindrical and outer wall is equipped with the spool groove (2-3) of annular；The valve pocket (1) is cylindrical, and inner wall is equipped with the valve of annular
It covers groove (1-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721401005.0U CN208138228U (en) | 2017-10-26 | 2017-10-26 | Low leakage low-frictional force texture type hydraulic efficiency slide valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721401005.0U CN208138228U (en) | 2017-10-26 | 2017-10-26 | Low leakage low-frictional force texture type hydraulic efficiency slide valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208138228U true CN208138228U (en) | 2018-11-23 |
Family
ID=64283537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721401005.0U Expired - Fee Related CN208138228U (en) | 2017-10-26 | 2017-10-26 | Low leakage low-frictional force texture type hydraulic efficiency slide valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208138228U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446432A (en) * | 2020-12-30 | 2021-09-28 | 油威力液压科技股份有限公司 | Hydraulic proportional valve core and surface texture processing technology thereof |
-
2017
- 2017-10-26 CN CN201721401005.0U patent/CN208138228U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446432A (en) * | 2020-12-30 | 2021-09-28 | 油威力液压科技股份有限公司 | Hydraulic proportional valve core and surface texture processing technology thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181123 Termination date: 20191026 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |