CN201787076U - Rotating shaft sealing piece - Google Patents
Rotating shaft sealing piece Download PDFInfo
- Publication number
- CN201787076U CN201787076U CN2010205064420U CN201020506442U CN201787076U CN 201787076 U CN201787076 U CN 201787076U CN 2010205064420 U CN2010205064420 U CN 2010205064420U CN 201020506442 U CN201020506442 U CN 201020506442U CN 201787076 U CN201787076 U CN 201787076U
- Authority
- CN
- China
- Prior art keywords
- lip
- rubber body
- oil seal
- polytetrafluoroethylene
- spring
- 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)
Abstract
The utility model provides a rotating shaft sealing piece, comprising a 'hui'-shaped metal skeleton; the metal skeleton is provided with a rubber body which extends toward the air to be used as a dustproof port; the middle section of the outer side is provided with a spring groove and is provided with an oil seal spring; the bottom of the inner side of the rubber body is provided with a polytetrafluoroethylene lip piece which extends upwards to be used as a sealing lip; an interference amount is arranged between the rubber body and the polytetrafluoroethylene lip piece; and the rubber body, the lip piece and the skeleton form a whole. The lip of the oil seal adopts polytetrafluoroethylene, and has the advantages of good temperature resistance (200-260 DEG C), friction resistance, pressure resistance, corrosion resistance and the like; the addition of the spring provides a durable radial force for the lip, and fast compensates leakage caused by a reason that the polytetrafluoroethylene material has poor elasticity, the linear expansion coefficient is large, the oil seal is easy to deform in the running of variable temperature and variable speed and the lip is displaced so as to generate gaps with a rotating shaft, therefore, the service life of the oil seal is effectively prolonged.
Description
Technical field
The utility model relates to the oil sealing parts at automobile engine crankshaft front and back ends running shaft position, specifically is rotation shaft seal.
Background technique
At present, in automobile industry, the sealing common oil seal structure that is used for the engine crankshaft front and back ends has two kinds: a kind of is fluid dynamic type rubber lip ring structure, and another kind is a teflon lip seal coil structures.Rubber oil sea at high temperature, run up, the operating temperature of oil seal lip is more and more higher, cause the generation cracking of the oil at lip position, form a kind of by-product of acidity, make the rubber lip surface produce one deck paint film or carbon distribution, and then cause the lip cracking, cause the sealing failure.The teflon lip-type packing is compared with rubber seal and is had many good qualities, as temperature tolerance good (200～260 ℃), wear-resisting, withstand voltage, corrosion-resistant etc., so a lot of seal makers also are used in the passenger car motor with the former teflon seal that is used for the forward and backward sealing of diesel engine bent axle, but it is because elasticity is relatively poor, must lean on the lip inwall reverse thread groove inclined-plane effect and produce the active force of a sealing medium in motor, just can seal fluid.If thread groove is too shallow, easily by abrasive dust and greasy stifled flat, function runs out of steam.Thread groove is too dark, in static state, fluid can be from groove seepage.Teflon is too hard in addition, lacks the tracing ability to axle, when the oil sealing rotating speed with 2000～3000 rev/mins increase and decrease, temperature in 30～40 ℃ of increase and decreases, the contraction of oil sealing lip seal face displacement, oil film breakdown produces intermittent the leakage.
In addition, teflon seal is divided into lip again to oil rollover transition according to the direction difference of lip moulding, and lip is to two kinds of air side flip type.
Lip mainly is to solve the risk of lip to oil rollover teflon seal transition easy turnup of lip in assembling to the teflon seal of air side flip type, but its resistance to pressure is just weaker, when running up, when constantly increasing, oil pocket pressure will produce seepage especially.
Summary of the invention
The purpose of this utility model is good in order to seek a kind of resistance to pressure, can solve because in high speed, the displacement of high temperature lower seal lip, oil film breakdown and cause sealing the problem of failure improves the new type sealing element of the sealing of oil sealing, specially proposes a kind of rotation shaft seal.
The technical solution of the utility model is for this reason, a kind of rotation shaft seal, comprise that Back Word type metal frame, metal frame are provided with rubber body, is characterized in that: described rubber body is extended as dustproof mouthful to air side, and stage casing, the outside is provided with spring groove and oil seal spring is installed; The rubber body inside bottom is provided with teflon lip sheet and extends upward as seal lip, is provided with magnitude of interference between rubber body and the teflon lip sheet.
Improvement to such scheme is: described rubber body, lip sheet and skeleton are as a whole.
Beneficial effect:
The lip sheet of the utility model oil sealing adopts teflon, have temperature tolerance good (200～260 ℃), advantage such as wear-resisting, withstand voltage, corrosion-resistant, the adding of spring, for lip provides a lasting radial force, compensated rapidly since polytetrafluoroethylmaterial material because of poor flexibility, linear expansion coeffcient is big, the leakage that oil sealing easily deforms in temperature-speed-changing degree running and the lip displacement causes with running shaft generation gap, thus effectively raise working life of oil sealing.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is a part section structure for amplifying schematic representation of the present utility model.
The 1st, teflon lip sheet, the 2nd, rubber body, 3-metal spring, 4-metal frame.
Embodiment
As shown in Figure 1 and Figure 2.
The utility model earlier becomes an integral body with 4 three ones of teflon lip sheets 1, rubber body 2, skeleton with the mould molded vulcanization, carry out post vulcanization again, the 3rd step was typing: is about 100 ℃ by the typing frock in temperature, and the time is under the process conditions about 1 hour the teflon lip sheet 1 on plane to be shaped as bell mouth shape; Be sleeve spring 3 in spring groove at last.
Claims (2)
1. rotation shaft seal, comprise that Back Word type metal frame, metal frame are provided with rubber body, it is characterized in that: described rubber body is extended as dustproof mouthful to air side, stage casing, the outside is provided with spring groove and oil seal spring is installed, the rubber body inside bottom is provided with teflon lip sheet and extends upward as seal lip, is provided with magnitude of interference between rubber body and the teflon lip sheet.
2. a kind of rotation shaft seal according to claim 1 is characterized in that: described rubber body, lip sheet and skeleton are as a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205064420U CN201787076U (en) | 2010-08-23 | 2010-08-23 | Rotating shaft sealing piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205064420U CN201787076U (en) | 2010-08-23 | 2010-08-23 | Rotating shaft sealing piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201787076U true CN201787076U (en) | 2011-04-06 |
Family
ID=43819039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205064420U Expired - Lifetime CN201787076U (en) | 2010-08-23 | 2010-08-23 | Rotating shaft sealing piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201787076U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170016972A (en) * | 2014-06-10 | 2017-02-14 | 엔오케이 가부시키가이샤 | Seal device |
| CN107575580A (en) * | 2017-07-26 | 2018-01-12 | 盐城润浩密封件科技有限公司 | A kind of hydraulic oil sealing of high-pressure rotary machine |
| CN107882997A (en) * | 2017-11-30 | 2018-04-06 | 浙江吉利新能源商用车有限公司 | A kind of engine oil seal |
-
2010
- 2010-08-23 CN CN2010205064420U patent/CN201787076U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170016972A (en) * | 2014-06-10 | 2017-02-14 | 엔오케이 가부시키가이샤 | Seal device |
| KR102385324B1 (en) | 2014-06-10 | 2022-04-08 | 엔오케이 가부시키가이샤 | Seal device |
| CN107575580A (en) * | 2017-07-26 | 2018-01-12 | 盐城润浩密封件科技有限公司 | A kind of hydraulic oil sealing of high-pressure rotary machine |
| CN107882997A (en) * | 2017-11-30 | 2018-04-06 | 浙江吉利新能源商用车有限公司 | A kind of engine oil seal |
| CN107882997B (en) * | 2017-11-30 | 2024-01-19 | 浙江吉利新能源商用车有限公司 | An engine oil seal |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110406 |