CN202055884U - Combined type valve rod oil seal - Google Patents
Combined type valve rod oil seal Download PDFInfo
- Publication number
- CN202055884U CN202055884U CN201120073275XU CN201120073275U CN202055884U CN 202055884 U CN202055884 U CN 202055884U CN 201120073275X U CN201120073275X U CN 201120073275XU CN 201120073275 U CN201120073275 U CN 201120073275U CN 202055884 U CN202055884 U CN 202055884U
- Authority
- CN
- China
- Prior art keywords
- support ring
- supporting ring
- seal
- sealing
- ptfe
- 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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- Sealing With Elastic Sealing Lips (AREA)
Abstract
The utility model relates to a sealing member, and especially relates to a combined type valve rod oil seal. The oil seal comprises a supporting ring and a PTFE sealing body. The supporting rod comprises an outer supporting ring and an inner supporting ring. The inner supporting ring is disposed on the inner side of the outer supporting ring. The inner supporting ring and the outer supporting ring are arranged in an interference fit manner. A Gap is formed between the top of the outer supporting ring and the top of the inner supporting ring. The outer end of the PTFE sealing body is arranged in the gap, and the inner end of the PTFE sealing body is arranged in the inner holes of the outer supporting ring and the inner supporting ring. A side sealing lip is disposed on the annular side of the PTFE sealing body. The side sealing lip and the inner surface of the outer supporting ring are arranged in an interference fit manner. A top sealing groove is arranged on the top surface where the PTFE sealing body and the outer supporting ring are contacted. A bottom sealing groove is arranged on the bottom surface where the PTFE sealing body and the inner supporting ring are contacted. An axial clearance is disposed between the wall of the inner hole of the outer supporting ring and the corresponding PTFE sealing body. Sealing lips are arranged on the inner side of the PTFE sealing body.
Description
Technical field
The utility model relates to a kind of Sealing, especially a kind of combined type valve rod oil sealing.
Background technique
The valve rod oil sealing is used for the sealing of engine valve guide rod, prevents that lubricant oil from entering the firing chamber, reduces engine performance.At present, valve rod oil sealing commonly used generally as shown in Figure 1, this oil sealing comprises support ring 1, rubber body 2 and spring 3, rubber body 2 is combined into one by vulcanization and support ring 1, spring 3 is positioned at rubber body lip 4 outsides, is used to provide the power of suitably holding tightly to guide rod.During work, though rubber body lip 4 has film lubrication, owing to reciprocating speed height, temperature rise, and the wear resistance of rubber elastomer is relatively poor, cause lip aging, wearing and tearing 4 within a short period of time easily, cause sealing effect to descend, thereby influence engine performance.
The model utility content
The purpose of this utility model has been to propose a kind of combined type valve rod oil sealing of new structure, and this oil sealing sealing is effective, and long service life has guaranteed the usability of motor.
The utility model is to adopt following technological scheme to realize: a kind of combined type valve rod oil sealing, comprise support ring, wherein, described oil sealing also comprises the PTFE seal, support ring comprises outer support ring and inside support ring, inside support ring is positioned at the inboard of outer support ring, and be interference fit between inside support ring and the outer support ring, be provided with the gap between the top of outer support ring and inside support ring, the outer end of PTFE seal is arranged in this gap, the inner is arranged in the endoporus of outer support ring and inside support ring, the annular outboard of PTFE seal is provided with the side sealing lip, the side sealing lip is and is bent upwards shape, and be interference fit with the internal surface of outer support ring, the bottom surface that end face that the PTFE seal contacts with outer support ring and PTFE seal contact with inside support ring is respectively equipped with top seal slot part and bottom sealing slot part, top seal slot part and bottom sealing slot part stored have lubricant oil, be provided with axial internal clearance between the endoporus hole wall of outer support ring and the corresponding PTFE seal, the inner side surface of PTFE seal is provided with sealing lip, sealing lip comprises primary seal lip and secondary sealed lip, primary seal lip is arranged on the top of PTFE seal, and secondary sealed lip is arranged on the bottom of PTFE seal.
The beneficial effects of the utility model are: by adopting PTFE as seal, can make oil sealing have good temperature tolerance and wear resistance, prolong the working life of oil sealing; In addition, in the top clearance that the PTFE seal is arranged on inside support ring and outer support ring, and the PTFE seal can produce suitable radial displacement in this gap, makes oil sealing have good anti-eccentricity, improved the sealing effect of oil sealing.In a word, this oil sealing has overcome the shortcoming of existing valve rod oil sealing, good sealing effect, and long service life has guaranteed the performance of motor.
Description of drawings
Fig. 1 is the sectional view of valve rod oil sealing in the prior art;
Fig. 2 is a sectional view of the present utility model.
Among the figure: 1 outer support ring; 2 inside support rings; The 3PTFE seal; 4 primary seal lip; 5 axial internal clearancies; 6 top seal grooves; 7 side sealing lips; 8 bottom seal grooves; 9 secondary sealed lips.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Fig. 2 is a combined type valve rod oil sealing described in the utility model, and this oil sealing comprises outer support ring 1, inside support ring 2 and PTFE seal 3.Inside support ring 2 is positioned at the inboard of outer support ring 1, and is interference fit between inside support ring 2 and the outer support ring 1.Be provided with the gap between the top of outer support ring 1 and inside support ring 2.The outer end of PTFE seal 3 is arranged in this gap, and the inner is arranged in the endoporus of outer support ring 1 and inside support ring 2.The annular outboard of PTFE seal 3 is provided with side sealing lip 7, and side sealing lip 7 is and is bent upwards shape, and is interference fit with the internal surface of outer support ring 1, to guarantee having good coaxality between PTFE seal 3 and the outer support ring 1.The small seal groove that the end face that PTFE seal 3 contacts with outer support ring 1 is provided with a plurality of projections is a top seal slot part 6; The bottom surface that PTFE seal 3 contacts with inside support ring 2 is provided with the i.e. bottom sealing of the small seal groove slot part 8 of a plurality of projections.All store a spot of lubricant oil in top seal slot part 6 and the bottom sealing slot part 8, make between the fitting surface of PTFE seal 3 and outer support ring 1, inside support ring 2 and all can form good lubricating effect, thereby make PTFE seal 3 produce suitable radial displacement in the gap at support ring 1 and inside support ring 2 tops outside, be used to compensate radial disbalance, make between valve guide rod and the PTFE seal 3 and can remain reliable sealing effect, guaranteed 3 pairs of good followability of valve guide rod of PTFE seal.Be provided with axial internal clearance 5 between the endoporus hole wall of outer support ring 1 and the corresponding PTFE seal 3, when axial internal clearance 5 can satisfy PTFE seal 3 and produces axial displacements to the requirement in space.
The inner side surface of described PTFE seal 3 promptly is provided with sealing lip towards a side of valve guide rod, sealing lip comprises primary seal lip 4 and secondary sealed lip 9, primary seal lip 4 is arranged on the top of PTFE seal 3, primary seal lip 4 by and valve guide rod between interference fit, played the effect of sealing lubricating oil.Secondary sealed lip 9 is arranged on the bottom of PTFE seal 3, and secondary sealed lip 9 can further improve the sealability of oil sealing; Simultaneously, secondary sealed lip 9 directly contacts with valve guide rod, can prevent to drive when guide rod is up PTFE seal 3 excessively upset takes place, and makes primary seal lip 4 expansions, causes oil leakage.
Claims (1)
1. combined type valve rod oil sealing, comprise support ring, it is characterized in that: described oil sealing also comprises PTFE seal (3), support ring comprises outer support ring (1) and inside support ring (2), inside support ring (2) is positioned at the inboard of outer support ring (1), and be interference fit between inside support ring (2) and the outer support ring (1), be provided with the gap between the top of outer support ring (1) and inside support ring (2), the outer end of PTFE seal (3) is arranged in this gap, the inner is arranged in the endoporus of outer support ring (1) and inside support ring (2), the annular outboard of PTFE seal (3) is provided with side sealing lip (7), side sealing lip (7) is and is bent upwards shape, and be interference fit with the internal surface of outer support ring (1), the bottom surface that end face that PTFE seal (3) contacts with outer support ring (1) and PTFE seal (3) contact with inside support ring (2) is respectively equipped with top seal slot part (6) and bottom sealing slot part (8), top seal slot part (6) and bottom sealing slot part (8) internal memory contain lubricant oil, be provided with axial internal clearance (5) between the endoporus hole wall of outer support ring (1) and the corresponding PTFE seal (3), the inner side surface of PTFE seal (3) is provided with sealing lip, sealing lip comprises primary seal lip (4) and secondary sealed lip (9), primary seal lip (4) is arranged on the top of PTFE seal (3), and secondary sealed lip (9) is arranged on the bottom of PTFE seal (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120073275XU CN202055884U (en) | 2011-03-19 | 2011-03-19 | Combined type valve rod oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120073275XU CN202055884U (en) | 2011-03-19 | 2011-03-19 | Combined type valve rod oil seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202055884U true CN202055884U (en) | 2011-11-30 |
Family
ID=45015858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120073275XU Expired - Fee Related CN202055884U (en) | 2011-03-19 | 2011-03-19 | Combined type valve rod oil seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202055884U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344907A (en) * | 2018-04-04 | 2019-10-18 | 科德宝密封技术意大利埃克斯特纳有限合伙公司 | The liner of valve for internal combustion engine |
-
2011
- 2011-03-19 CN CN201120073275XU patent/CN202055884U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344907A (en) * | 2018-04-04 | 2019-10-18 | 科德宝密封技术意大利埃克斯特纳有限合伙公司 | The liner of valve for internal combustion engine |
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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 |
Granted publication date: 20111130 Termination date: 20150319 |
|
| EXPY | Termination of patent right or utility model |