CN85201116U - Low steady-state hydraulic sliding valve - Google Patents
Low steady-state hydraulic sliding valve Download PDFInfo
- Publication number
- CN85201116U CN85201116U CN 85201116 CN85201116U CN85201116U CN 85201116 U CN85201116 U CN 85201116U CN 85201116 CN85201116 CN 85201116 CN 85201116 U CN85201116 U CN 85201116U CN 85201116 U CN85201116 U CN 85201116U
- Authority
- CN
- China
- Prior art keywords
- valve
- sliding valve
- steady
- state hydraulic
- spool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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- Multiple-Way Valves (AREA)
Abstract
The utility model discloses a low steady-state hydraulic sliding valve. Through an appropriate rectangular ring groove on a valve core, the low steady-state hydraulic sliding valve can effectively eliminate the steady-state hydraulic influence on the sliding valve (can reach best about 1/8 of the hydraulic force of the traditional sliding valve). The effect of the sliding valve is good, and the processing is simple.
Description
The utility model belongs to a kind of hydraulic element.
When guiding valve was opening state in hydraulic system, the work fluid in (showing as Fig. 1) hyperbaric chamber 1 flowed into low-pressure cavity 2 through valve port x, can be subjected to steady-state fluid force F on the valve core of the spool valve 3
' SEffect, F
' SDirection is towards the direction that valve port is closed.Its size is:
F
′ S＝2C
gC
vπdx（P
1－P
2）cosθ
C wherein
g---flow coefficient (0.62)
C
v---velocity coefficient (0.98)
d
1---valve core diameter
The aperture of x---valve
θ---valve port efflux angle (69 °)
P
1---the hyperbaric chamber oil pressure
P
2---the low-pressure cavity oil pressure
The existence of steady-state fluid force makes does overflow, and the pressure valve characteristic of purposes such as decompression is abominable, also brings variety of issue to other design and performance of using the guiding valve hydraulic mechanism.In order to eliminate this steady-state fluid force, Soviet Union л, C.The guiding valve of a kind of structure as shown in Figure 2 of design such as Manfred Stohl ripple husband.(" lathe and hydraulic pressure " 1982, № 1. " pressure stability of band direct-acting overflow valve Machinery Tool Hydraulic Transmission device ").This structure mainly is boring one additional holes 5 on spool working edge place valve body 4, and on spool, cut a groove 6 with special shape, thereby the liquid that opening is flowed out flows the 5 places diffusion in the hole along valve core axis, and acts on the end face of groove 6, produces an additional force that the valve opening is increased.When flow and oil pressure increased, this additional force increased equally with the power of surging, and can partly eliminate steady-state fluid force.
But the guiding valve of this structure is than the common guiding valve twice of manying complicated processing operation.Promptly boring length is t on valve body
1, the degree of depth is h
1Hole 5 and on spool peculiar width of groove 6 such shapes of processing be the groove of l.This groove angle of tilt β is desired avoiding in the common turning processing.This two procedures will make product cost that bigger increase is arranged.In addition, the experimental result from above-mentioned data, the effect of this valve elimination steady-state fluid force is also unsatisfactory.
The utility model is exactly at above-mentioned the deficiencies in the prior art, proposes a kind of simply and effectively structure, solves the steady-state fluid force problem.This structure is promptly cut the circular groove 7 of a rectangular cross-section as shown in Figure 3 on traditional valve core of the spool valve.Because the circular groove of this rectangular cross-section exists, make the oil stream streamline that sprays at a high speed by valve port x place that bigger variation (as shown in Figure 3) take place.These high velocity jet flow to the oil on the upper-end surface of circular groove 7, make spool be subjected to an additional force F who makes spool towards the opening augment direction
" S, can with steady-state fluid force F
' SEffect offset.Their F that makes a concerted effort
S=F
' S-F
" S(direction is towards the opening closing direction) is exactly the actual remaining steady-state fluid force of this kind structure guiding valve.
If circular groove width b is designed to the d of valve core diameter
1About 3/4, then effect is preferable.Other parameters of impact effect are counter bore hole diameters D on the valve body, and footpath d ' and spool working edge are to circular groove base thickness t at the bottom of the circular groove.Under the situation that structural design allows, above-mentioned size (D, d ', t) can try one's best littler.
Fig. 1 is the conventional spool valves structure principle chart.
Fig. 2 is the sliding valve structure schematic diagram with pressure stability effect.
Fig. 3 is low steady-state fluid force sliding valve structure schematic diagram.
Fig. 4 is the power F that surges
SWith pressure difference P
1-P
2Graph of relation.
The guiding valve of this structure can be received the effect of good elimination steady-state fluid force, and this point can be seen from the shown result of embodiment and Fig. 4 is clear. In addition, because the cannelure cross section is regular rectangular shape, requirement on machining accuracy is not high, and common turning is processed and can conveniently be realized, and is very little to the product cost impact, thereby has obvious economic worth and practical value.
The relevant size of circular groove is designed to respectively among the embodiment of this structure:
The D=27 millimeter
d
1=20 millimeters
D '=8 millimeter
The b=16 millimeter
The t=2 millimeter
Flow one timing as the opening x that flows through valve acts on the power of the surging F on the valve core of the spool valve
SWith opening x both sides pressure difference P
1-P
2Relation curve shown in the curve B among Fig. 4.Curve A goes up the suffered power of surging and the relation curve of pressure difference for the conventional spool valves spool (valve core diameter also is 20 millimeters) by structural design shown in Figure 1 among Fig. 4.Relatively two curves are not difficult to find out that the utility model is a kind of guiding valve of low steady-state fluid force really.
Claims (2)
1, a kind of guiding valve is made up of spool (3) and valve body (4), it is characterized in that cutting on the above-mentioned spool (3) circular groove (7) of a rectangular cross-section.
2, the sort of guiding valve as claimed in claim 1, the circular groove width (b) that it is characterized in that this rectangular cross-section are spool (3) diameter (d
1) about 3/4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85201116 CN85201116U (en) | 1985-04-27 | 1985-04-27 | Low steady-state hydraulic sliding valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85201116 CN85201116U (en) | 1985-04-27 | 1985-04-27 | Low steady-state hydraulic sliding valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85201116U true CN85201116U (en) | 1986-05-07 |
Family
ID=4797260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85201116 Ceased CN85201116U (en) | 1985-04-27 | 1985-04-27 | Low steady-state hydraulic sliding valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85201116U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867748A (en) * | 2012-12-18 | 2014-06-18 | 本田技研工业株式会社 | Spool valve |
-
1985
- 1985-04-27 CN CN 85201116 patent/CN85201116U/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867748A (en) * | 2012-12-18 | 2014-06-18 | 本田技研工业株式会社 | Spool valve |
| CN103867748B (en) * | 2012-12-18 | 2016-01-20 | 本田技研工业株式会社 | Guiding valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |