CN202811588U - Servo valve with novel spool outward seal structure - Google Patents
Servo valve with novel spool outward seal structure Download PDFInfo
- Publication number
- CN202811588U CN202811588U CN 201220350262 CN201220350262U CN202811588U CN 202811588 U CN202811588 U CN 202811588U CN 201220350262 CN201220350262 CN 201220350262 CN 201220350262 U CN201220350262 U CN 201220350262U CN 202811588 U CN202811588 U CN 202811588U
- Authority
- CN
- China
- Prior art keywords
- spool
- valve
- sleeve
- end cover
- end sleeve
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a servo valve with a novel spool outward seal structure. The servo valve comprises a valve sleeve, a end sleeve located in the valve sleeve and a spool located in the end sleeve and is characterized in that a large seal ring is disposed between the valve sleeve and the end sleeve, a small seal ring is disposed between the end sleeve and the spool, the inner diameter of the end of the valve sleeve is 0-4 micrometers larger than the outer diameter of the end sleeve, and the inner diameter of the end sleeve is 8-16 micrometers larger than the outer diameter of the spool. A seal manner that 'the end sleeve is in interference fit with the valve sleeve and the end sleeve is in clearance fit with the spool' is used, so that effective seal is achieved, and oil pressure bearing, which leads to spool inclination in the valve sleeve and slide valve blocking, of seal members is effectively avoided.
Description
Technical field
The utility model relates to and a kind ofly has Novel valve core to the servovalve of outer seal configuration, particularly relates to a kind ofly both effectively sealing, and that has avoided effectively again that Sealing bears oil pressure has Novel valve core to the servovalve of outer seal configuration.
Background technique
Servovalve is the core parts of hydraulic control.The tradition servovalve generally adopts two-layer configuration, and prestage adopts the modes such as nozzle flapper, local derviation jet, and power stage adopts sliding valve structure, and the guiding valve pair is the core component of power stage guiding valve.The tradition servovalve is by the motion of prestage driving power level spool, and spool is in valve pocket inside, and spool does not need external sealed.
But the development along with servo valve technology, occurred such as directly-drive servo valve etc. at interior servovalve, this class servovalve is owing to adopt directly the technology such as driving spool, and the guiding valve auxiliary structure is different from conventional spool valves, spool need to extend the valve pocket outside, so spool need to be to external sealed.Spool, valve pocket belong to precision parts, and only there are several microns in gap between the two, and therefore, it is dumb that the unreasonable meeting of the external design of Sealing Structure of spool causes spool to slide, even clamping stagnation.Therefore needing badly provides a kind of and has Novel valve core to the servovalve of outer seal configuration.
Summary of the invention
The technical problems to be solved in the utility model provides and a kind ofly both effectively sealed, and that has avoided effectively again that Sealing bears oil pressure has Novel valve core to the servovalve of outer seal configuration.
For solving the problems of the technologies described above, the utility model is a kind of to have Novel valve core to the servovalve of outer seal configuration, comprises valve pocket, is positioned at end cover among the valve pocket, is positioned at the spool among the end cover, and valve pocket is provided with big sealing ring between overlapping with end; Be provided with small sealing ring between end cover and the spool.
The internal diameter of valve pocket end is greater than external diameter 0 ~ 4 μ m of end cover.
The internal diameter of end cover is greater than the external diameter 8 μ m of spool ~ 16 μ m.
The utility model adopts the mode of " end cover and valve pocket interference fit, end cover and spool Spielpassung " to seal.Both effectively sealed, and effectively avoided again Sealing to bear oil pressure, thereby cause spool in the valve pocket medium dip, and then caused the problem of guiding valve clamping stagnation.
Description of drawings
Fig. 1 is that novel spool provided by the utility model is to the schematic representation of outer seal configuration.
Among the figure: 1 is that valve pocket, 2 is that big sealing ring, 3 is that spool, 4 is small sealing ring for holding cover, 5.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
Claims (3)
1. one kind has Novel valve core to the servovalve of outer seal configuration, comprises valve pocket, is positioned at end cover among the valve pocket, is positioned at the spool among the described end cover, and it is characterized in that: described valve pocket is provided with big sealing ring between overlapping with end; Be provided with small sealing ring between described end cover and the spool.
2. according to claim 1 a kind ofly have Novel valve core to the servovalve of outer seal configuration, it is characterized in that: the internal diameter of described valve pocket end is greater than external diameter 0 ~ 4 μ m of described end cover.
3. according to claim 1 a kind ofly have Novel valve core to the servovalve of outer seal configuration, it is characterized in that: the internal diameter of described end cover is greater than the external diameter 8 μ m of described spool ~ 16 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220350262 CN202811588U (en) | 2012-07-18 | 2012-07-18 | Servo valve with novel spool outward seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220350262 CN202811588U (en) | 2012-07-18 | 2012-07-18 | Servo valve with novel spool outward seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202811588U true CN202811588U (en) | 2013-03-20 |
Family
ID=47870470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220350262 Expired - Fee Related CN202811588U (en) | 2012-07-18 | 2012-07-18 | Servo valve with novel spool outward seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202811588U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673600A (en) * | 2014-11-20 | 2016-06-15 | 上海科星电液控制设备有限公司 | Valve sleeve used for servo valve |
-
2012
- 2012-07-18 CN CN 201220350262 patent/CN202811588U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673600A (en) * | 2014-11-20 | 2016-06-15 | 上海科星电液控制设备有限公司 | Valve sleeve used for servo valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20180718 |