CN202732016U - Backpressure lip valve oil seal - Google Patents
Backpressure lip valve oil seal Download PDFInfo
- Publication number
- CN202732016U CN202732016U CN 201220328035 CN201220328035U CN202732016U CN 202732016 U CN202732016 U CN 202732016U CN 201220328035 CN201220328035 CN 201220328035 CN 201220328035 U CN201220328035 U CN 201220328035U CN 202732016 U CN202732016 U CN 202732016U
- Authority
- CN
- China
- Prior art keywords
- lip
- oil seal
- backpressure
- valve oil
- rubber body
- 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 - Lifetime
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- Sealing With Elastic Sealing Lips (AREA)
- Check Valves (AREA)
Abstract
The utility model discloses a backpressure lip valve oil seal. The backpressure lip valve oil seal comprises a framework, a rubber body, springs and a lip opening, wherein a backpressure lip extends in the slanting downward direction under the lip opening on one side of the lip opening of the rubber body; and the cross section of the framework in the shape of an annular body is relative Z-shaped. The backpressure lip valve oil seal has the characteristics of application to an engine with a high-pressure exhaust hole, simple structure and convenience for mounting.
Description
Technical field
The utility model belongs to the engine oil seal technical field, especially relates to a kind of back pressure lip valve oil seal for engine valve.
Background technique
Valve oil seal is one of strength member of engine valve actuating mechanism, and valve oil seal cooperates with valve stem, valve guide bushing, is used for the sealing of engine air valve rod; Valve oil seal can prevent that machine oil from entering engine chamber by the gap between valve stem and the valve guide bushing, cause machine oil to run off and engine power under the generation of degradation phenomenon, prevent the mixed gas of gasoline and air and discharging waste gas leakage and cause pollution to atmosphere; Valve oil seal generally is comprised of skeleton, rubber and spring and lip, the valve oil seal of most domestic all adopts skeleton outer wrapping rubber body at present, the rubber body inboard is provided with lip, although can reach certain purpose, but these oil sealings only can be used in exhaust port pressure less than the motor of 0.2MPa, can not use the large motor of exhaust port pressure, for example heavy duty diesel engine, turbosupercharged engine.
Summary of the invention
The purpose of this utility model is to improve the deficiency of prior art and provides a kind of for the large motor of exhaust port pressure, back pressure lip valve oil seal simple in structure, easy for installation.
The purpose of this utility model is to realize like this, a kind of back pressure lip valve oil seal, formed by skeleton, rubber body, spring and lip, be characterized in rubber body lip one side, lip below be extended with back pressure lip below tiltedly, two cross sections of the skeleton of cirque body shape are relative Z-shaped.
Compared with the prior art the utility model has following distinguishing feature and good effect: the utility model adopt be in rubber body lip one side, lip below be extended with back pressure lip below tiltedly, by increasing a back pressure lip, so just go for heavy duty diesel engine or exhaust port pressure greater than the turbosupercharged engine of 0.2MPa; The cross section of the skeleton of cirque body shape be relative two Z-shaped, such structure one is that the support rubber body plays good sealing and the effect of supercharging with, lip and back pressure lip well, the 2nd, saved the parts such as pad of prior art, be convenient to install, improved installation efficiency.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described in further detail.
Fig. 1 is a kind of structural representation of the present utility model.
Embodiment
Embodiment, a kind of back pressure lip valve oil seal, with reference to Fig. 1, to be wrapped with rubber body 2 at skeleton 1, be formed with lip 4 on rubber body 2 inwalls, the rubber body 2 in lip 4 outsides is provided with spring 3, lip 4 is provided with the backflow line, in lip 4 one sides of rubber body 2, the below of lip 4 is extended with the back pressure lip 5 to oblique below, and two cross sections of the skeleton 1 of cirque body shape are that relative two of direction are Z-shaped, the left side is Z-shaped, the right side is for anti-Z-shaped, the cross section of the skeleton 1 of cirque body shape be relative two Z-shaped, the left side is Z-shaped, the right side is for anti-Z-shaped, and this consists of a kind of structure of the present utility model.
Claims (1)
1. back pressure lip valve oil seal, formed by skeleton (1), rubber body (2), spring (3) and lip (4), the below that it is characterized in that lip (4) one sides, lip (4) in rubber body (2) is extended with the back pressure lip (5) to oblique below, and two cross sections of the skeleton of cirque body shape (1) are relative Z-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220328035 CN202732016U (en) | 2012-07-09 | 2012-07-09 | Backpressure lip valve oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220328035 CN202732016U (en) | 2012-07-09 | 2012-07-09 | Backpressure lip valve oil seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202732016U true CN202732016U (en) | 2013-02-13 |
Family
ID=47657727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220328035 Expired - Lifetime CN202732016U (en) | 2012-07-09 | 2012-07-09 | Backpressure lip valve oil seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202732016U (en) |
-
2012
- 2012-07-09 CN CN 201220328035 patent/CN202732016U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |
|
| CX01 | Expiry of patent term |