CN102979591A - High wear-resistant valve pressurizing oil seal - Google Patents

High wear-resistant valve pressurizing oil seal Download PDF

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Publication number
CN102979591A
CN102979591A CN2012105139859A CN201210513985A CN102979591A CN 102979591 A CN102979591 A CN 102979591A CN 2012105139859 A CN2012105139859 A CN 2012105139859A CN 201210513985 A CN201210513985 A CN 201210513985A CN 102979591 A CN102979591 A CN 102979591A
Authority
CN
China
Prior art keywords
lip
ptfe
oil seal
rubber
patch
Prior art date
Application number
CN2012105139859A
Other languages
Chinese (zh)
Inventor
吴克胜
陈庆斌
何洪
Original Assignee
揭阳市天诚密封件有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 揭阳市天诚密封件有限公司 filed Critical 揭阳市天诚密封件有限公司
Priority to CN2012105139859A priority Critical patent/CN102979591A/en
Publication of CN102979591A publication Critical patent/CN102979591A/en

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Abstract

The invention disclose a high wear-resistant valve pressurizing oil seal of an engine. The oil seal comprises a rubber body, a framework and a PTFE (polytetrafluoroethylene) patch, and is shaped by vulcanization bonding by three different materials. After shaping, a main lip port which is in interference fit with a valve rod is generated on the PTFE patch; the lip port of the PTFE patch is in a circular jagged shape; and a pressure-bearing air lip which is in interference fit with the valve rod is generated on the rubber body. Four convex plates which are annularly distributed are arranged on the rubber body 2; and the surface of the convex plate is in clearance fit with the valve rod. Because the PTFE patch has a circular jagged multi-lip port structure, the PTFE patch can be used under high-speed and high-pressure working condition for a long time and is difficult to wear; the pressure-bearing air lip is arranged at the lower part of the lip port of the PTFE patch, the oil leakage amount of the engine can be effectively prevented from entering a cylinder under a turbo charging condition, and the cylinder is prevented from carbon deposition; and four convex plates which are annularly distributed are arranged from the lip port of the PTFE patch to the middle part of the pressure-bearing air lip, when the valve rod works, the valve rod has auxiliary guiding and protection functions, and the service life is prolonged.

Description

A kind of high abrasion valve plenum oil seal
Technical field
The present invention relates to a kind of turbosupercharging valve oil seal, especially a kind of high abrasion valve plenum oil seal.
Background technique
Along with advancing by leaps and bounds of automobile industry, scientific and technological constantly bringing forth new ideas and using, the core technology of automobile still is motor, and the quality of engine performance depends on each component that forms in the power system, only have component to reach the requirement of use, could perfectly bring the performance of motor into play, engine type now mainly is divided into two kinds of natural aspiration and turbosuperchargings, but turbo charged motor is higher to the pressure of air inlet and exhaust, current valve oil seal can not satisfy usage requirement fully, in long-time high speed, the seal lip easy to wear of working under the high pressure conditions, engine turbine supercharging sealability is descended, aggravate other component loss, have potential safety hazard.
Summary of the invention
In order to solve above technical problem, the object of the present invention is to provide a kind of high abrasion valve plenum oil seal, original rubber tape spring lip is changed to PTFE (teflon) paster without the spring lip, and PTFE paster lip is designed with arcuate serrated shape structure, simultaneously be designed with back pressure gas lip in the bottom of PTFE paster lip, PTFE paster lip is provided with annular boss to back pressure gas lip.
The present invention, comprise skeleton and rubber body, be provided with the PTFE paster in the upper end of skeleton, described PTFE paster, rubber body and skeleton are by the moulding of mould sulfuration adhesion, after the moulding, at the main lip of PTFE paster generation with the valve stem interference fit, on rubber body, generate the back pressure gas lip with the valve stem interference fit.
The present invention, described main lip is flexuose ringwise.
The present invention on rubber body, between back pressure gas lip and main lip, is provided with 4 boss of annular spread, and boss is uniform by 4 five equilibriums, and surface and the valve stem of boss are Spielpassung, and gap size is 0.1~0.2mm.
The present invention, the interval between adjacent two boss is less than or equal to the length of 1/2nd boss.
The present invention, the magnitude of interference of back pressure gas lip and valve stem interference fit is than the little 0.2~0.4mm of magnitude of interference of the interference fit of main lip and valve stem.
The present invention, its beneficial effect is: this high abrasion valve plenum oil seal not only can carry out in the turbosupercharging condition at a high speed for a long time, the work of high pressure, and not easy to wear, has the autoprotection function.Guarantee whole motor performance pressurization performance, guarantee normal operation and the wearing and tearing of other component, eliminate safe hidden trouble.
Description of drawings
Fig. 1 is embodiment's structural representation, and Fig. 2 and Fig. 3 are partial structurtes (amplification) schematic representation of Fig. 1.Fig. 4 is embodiment's erection drawing.
Among the figure, among the figure, 1, the PTFE paster; 2, rubber body; 3, skeleton; 4, main lip; 5, back pressure gas lip; 6, boss; 7, valve guide bushing; 8, valve stem.
Embodiment
As shown in Figure 1, present embodiment is by PTFE paster 1, rubber body 2, skeleton 3 is by the moulding of mould sulfuration adhesion, after the moulding, at the main lip 4 of PTFE paster 1 generation with valve stem 8 interference fit, described main lip 4 is flexuose ringwise, on rubber body 2, generate with the back pressure gas lip 5 of valve stem 8 interference fit with valve stem 8 and be 4 boss 6 of Spielpassung, boss 6 is uniform by 4 five equilibriums, with the gap size of valve stem 8 be 0.1~0.2mm, boss 6 is between back pressure gas lip 5 and main lip 4, and the interval between adjacent two boss 6 is less than or equal to the length of 1/2nd boss 6.
As shown in Figure 4, after the present embodiment assembling, 8 one-tenth many lips interference fit of main lip 4 and valve rod because main lip 4 is the PTFE material, have abrasion resistant qualities, add the cooperation of a plurality of lips, can bear higher working pressure, meet higher usage requirement.Back pressure gas lip 5 also with valve stem 8 interference fit, but the magnitude of interference that cooperates is than the little 0.2~0.4mm of main lip 4 interference, can guarantee that like this valve stem 8 is at a high speed, during the high pressure motion, by micro-engine oil leakage, reach the lubrication protection effect.Valve stem 8 is Spielpassung with valve guide bushing 7; when valve stem 8 after valve guide bushing 7 medium-term and long-term motion break-ins; may be loosening because of matching gap, cause axis deviation, and the design of boss 6 internal diameter sizes; than the little 0.1~0.2mm of valve stem 8 sizes; if being worn, the axle center departs from, but boss 6 correctings and leading role, protection seal lip; reduce the wastage, increase the service life.

Claims (5)

1. high abrasion valve plenum oil seal, comprise skeleton (3) and rubber body (2), it is characterized in that: be provided with PTFE paster (1) in the upper end of skeleton (3), described PTFE paster (1), rubber body (2) and skeleton (3) are by the moulding of mould sulfuration adhesion, after the moulding, at the main lip (4) of PTFE paster (1) generation with valve stem (8) interference fit, on rubber body (2), generate the back pressure gas lip (5) with valve stem (8) interference fit.
2. high abrasion valve plenum oil seal according to claim 1, it is characterized in that: described main lip (4) is flexuose ringwise.
3. high abrasion valve plenum oil seal according to claim 1, it is characterized in that: on rubber body (2), be positioned between back pressure gas lip (5) and the main lip (4), be provided with 4 boss (6) of annular spread, boss (6) is uniform by 4 five equilibriums, the surface of boss (6) and valve stem (8) are Spielpassung, and gap size is 0.1~0.2mm.
4. high abrasion valve plenum oil seal according to claim 3, it is characterized in that: the interval between adjacent two boss is less than or equal to the length of 1/2nd boss (6).
5. high abrasion valve plenum oil seal according to claim 1 is characterized in that: the magnitude of interference of back pressure gas lip (5) and the interference fit of valve stem (8), and than the magnitude of interference little 0.2~0.4mm of main lip (4) with the interference fit of valve stem (8).
CN2012105139859A 2012-12-04 2012-12-04 High wear-resistant valve pressurizing oil seal CN102979591A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012105139859A CN102979591A (en) 2012-12-04 2012-12-04 High wear-resistant valve pressurizing oil seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012105139859A CN102979591A (en) 2012-12-04 2012-12-04 High wear-resistant valve pressurizing oil seal

Publications (1)

Publication Number Publication Date
CN102979591A true CN102979591A (en) 2013-03-20

Family

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Family Applications (1)

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CN2012105139859A CN102979591A (en) 2012-12-04 2012-12-04 High wear-resistant valve pressurizing oil seal

Country Status (1)

Country Link
CN (1) CN102979591A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103388501A (en) * 2013-08-18 2013-11-13 揭阳市天诚密封件有限公司 Turbocharging valve oil seal capable of resisting high temperature, high pressure and heavy wear
CN105365133A (en) * 2015-10-08 2016-03-02 北京动力机械研究所 Pasted sheet solidification device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3420522A1 (en) * 1984-06-01 1985-12-05 Lechler Elring Dichtungswerke Valve stem sealing
CN2890347Y (en) * 2006-01-17 2007-04-18 程峰 Rubber composite valve oil seal
EP2112337A1 (en) * 2008-04-23 2009-10-28 Carl Freudenberg KG Valve stem seal
CN201531288U (en) * 2009-11-11 2010-07-21 青岛开世密封工业有限公司 Valve oil seal with intensified flexing resistance
CN202047877U (en) * 2010-12-30 2011-11-23 广州汽车集团股份有限公司 Oil seal structure of engine valve
CN202926414U (en) * 2012-12-04 2013-05-08 揭阳市天诚密封件有限公司 High-abrasion resistance supercharging oil seal for valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3420522A1 (en) * 1984-06-01 1985-12-05 Lechler Elring Dichtungswerke Valve stem sealing
CN2890347Y (en) * 2006-01-17 2007-04-18 程峰 Rubber composite valve oil seal
EP2112337A1 (en) * 2008-04-23 2009-10-28 Carl Freudenberg KG Valve stem seal
CN201531288U (en) * 2009-11-11 2010-07-21 青岛开世密封工业有限公司 Valve oil seal with intensified flexing resistance
CN202047877U (en) * 2010-12-30 2011-11-23 广州汽车集团股份有限公司 Oil seal structure of engine valve
CN202926414U (en) * 2012-12-04 2013-05-08 揭阳市天诚密封件有限公司 High-abrasion resistance supercharging oil seal for valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103388501A (en) * 2013-08-18 2013-11-13 揭阳市天诚密封件有限公司 Turbocharging valve oil seal capable of resisting high temperature, high pressure and heavy wear
CN105365133A (en) * 2015-10-08 2016-03-02 北京动力机械研究所 Pasted sheet solidification device

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Application publication date: 20130320