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Rotary motion oil seal

A technology of rotary motion and oil seal, applied in the direction of engine seals, engine components, mechanical equipment, etc., can solve the problems of dust-proof lip rubber wear, seal failure, dust-proof failure, etc., to reduce the contact area, reduce the friction coefficient, The effect of improving the service life

Inactive Publication Date: 2015-02-18
YANTAI RUNFUXIANG OIL SEAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is interference between the dust-proof lip and the sealing shaft, due to the dry friction between the dust-proof lip and the shaft, it is easy to cause rapid wear and tear of the dust-proof lip rubber, resulting in dust-proof failure; There is a clearance fit between the dust lip and the seal shaft, and fine dust particles will directly enter the dust lip of the oil seal, and then enter the main sealing lip, resulting in seal failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1, a rotary motion oil seal, refer to figure 1 , figure 2 , Is an elastic sealing body 11 wrapped around the support frame 1. The elastic sealing body 11 is formed with a main sealing lip 2 and a dust lip near the side of the rotating shaft, and a spring 3 is provided on the outside of the main sealing lip 2, and the dust lip is formed The annular sealing surface is provided with a convex or concave stripe 12. In this embodiment, there are three dust-proof lips, which are the first dust-proof lip 4, the second dust-proof lip 5, and the first dust-proof lip. Three dust-proof lips 6, each dust-proof lip forms an annular sealing surface, respectively, the first annular sealing surface 7, the second annular sealing surface 8 and the third annular sealing surface 9, the three dust-proof lips are annular The raised stripes 12 on the sealing surface are annular patterns, which are evenly distributed, and the height of the annular patterns is 0.3 mm.

Embodiment 2

[0032] Example 2, a rotary motion oil seal, refer to image 3 , On the basis of embodiment 1, the annular sealing surface of the dust lip is provided with a plurality of protrusions or pits 13 which form vertical and horizontal grooves on the annular sealing surface of the dust lip. The shape of the protrusions or pits 13 can be hemispherical, tetragonal, truncated cone-shaped or polygonal pyramid shape, and the sealing surface between adjacent protrusions or between adjacent pits 13 can be flat, concave or arc-shaped. Convex arc shape, the dust lip of this embodiment is respectively the first dust lip 4, the second dust lip 5, and the third dust lip 6. Each dust lip forms an annular sealing surface, respectively The first ring sealing surface 7, the second ring sealing surface 8 and the third ring sealing surface 9, the first dust lip ring sealing surface 7 is provided with a plurality of triangular protrusions 13, the second dust lip The annular sealing surface 8 is provided ...

Embodiment 3

[0033] Example 3, a rotary motion oil seal, refer to Figure 4 , Is on the basis of embodiment 2, in this embodiment the first dust lip ring sealing surface 7, the second dust lip ring sealing surface 8, the third dust lip ring sealing surface 9, the first dust lip ring sealing surface The dust lip annular sealing surface 7 is provided with rough point-like protrusions 13, the second dust lip annular sealing surface 8 is provided with a plurality of square grid line protrusions 13, and the third dust lip annular sealing surface 9 A plurality of diamond-shaped grid line protrusions 13 are arranged on the upper surface, and the protrusions 13 are randomly distributed on the annular sealing surface. The height of the protrusions 13 is 0.07 mm, and the others are exactly the same as those in the second embodiment.

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Abstract

The invention discloses a rotary motion oil seal. The rotary motion oil seal consists of an elastic sealing body, a supporting framework, a sealing main lip, a dust-proof lip and a spring, wherein the dust-proof lip forms an annular sealing surface; the annular sealing surface is provided with convex or concave stripes or the annular sealing surface is provided with a plurality of bumps or pits; the bumps or pits form longitudinal and transverse trenches in the annular sealing surface of the dust-proof lip; meanwhile, a PTFE (Polytetrafluoroethylene) lip can be adhered to the dust-proof lip to reduce the friction coefficient. The rotary motion oil seal has the characteristics that the dust-proof performance is good, a dry friction state between the dust-proof lip and a sealing shaft is reduced, the dry grinding resistance and the wear resistance performance of the dust-proof lip are improved, and the service life is long.

Description

Technical field [0001] The invention belongs to the technical field of oil seals, and particularly relates to a rotary motion oil seal. Background technique [0002] In recent years, with the development of the automobile industry, automobiles have increasingly higher requirements for oil seal sealing performance. Looking at the leaking oil seals on the market, most of them are not caused by the failure of the main sealing lip, but because of the failure of dust prevention, dust particles directly enter the main lip, and the dust particles directly cushion the main sealing lip, or cause the main sealing lip The rapid wear of the mouth causes the seal to fail. In the design of the oil seal, the dust lip is mostly formed by rubber vulcanization, and the dust-proof capacity depends on the amount of interference between the oil seal dust lip and the seal shaft. If there is interference between the dust lip and the sealed shaft, the dry friction between the dust lip and the shaft is...

Claims

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Application Information

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IPC IPC(8): F16J15/32F16J15/3208F16J15/3232
CPCF16J15/3244F16J15/32
Inventor 杜杰初睿
Owner YANTAI RUNFUXIANG OIL SEAL
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