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Wave-shaped lip oil seal with backflow stripes at lip opening and three-dimensional modeling method

A technology of reflow pattern and lip, which is applied in the field of corrugated lip oil seal and 3D modeling, and can solve problems such as not widely used, easy to wear, complex structure of the lip, etc.

Inactive Publication Date: 2017-03-15
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the wave lip oil seal also has disadvantages, that is, the lip is sharp and easy to wear, but because of its excellent hydrodynamic characteristics, it is considered to be the first truly hydrodynamic oil seal in the field of sealing technology.
The structure of the lip part of the corrugated lip oil seal is relatively complex, not only containing complex free-form curved surfaces, but also these complex curved surfaces spread throughout the entire cylindrical space along the circumference, the precise modeling and processing of such complex cylindrical parts with free-form surfaces and grooves It is still a technical problem in the field of CAD / CAM technology at present. It is difficult to directly complete the precise shape of the wave lip oil seal and its mold with any CAD / CAM software on the market. Although the wave lip oil seal has excellent sealing and lubricating properties, However, it has not been widely used so far

Method used

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  • Wave-shaped lip oil seal with backflow stripes at lip opening and three-dimensional modeling method
  • Wave-shaped lip oil seal with backflow stripes at lip opening and three-dimensional modeling method
  • Wave-shaped lip oil seal with backflow stripes at lip opening and three-dimensional modeling method

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Experimental program
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Embodiment 1

[0056] Such as Figure 1 to Figure 4 As shown, this embodiment provides a corrugated lip oil seal with reflow lines on the lip. The corrugated lip oil seal includes a rubber body, a metal frame 3, a sealing lip 1 with reflow lines, a spring 2 and a dust-proof lip 4; The surface of the lip 1 includes an air side lip side 13, a lip surface and an oil side lip side 15, and a reflow pattern 5 is arranged on the lip surface, and the lip surface is mainly composed of the lip base surface 14 and the lip surface. The base surface 14 is composed of a reflow cylinder surface, wherein the lip base surface 14 is a ruled surface surrounded by two closed sinusoidal curves of the same shape on the same cylindrical surface, the air side lip side 13 and the oil The side lip side surfaces 15 are ruled surfaces formed by two boundary sinusoidal curves of the lip base surface 14 and closed sinusoidal curves with equal period, phase and amplitude on the other two cylindrical surfaces.

[0057] Wh...

Embodiment 2

[0061] A corrugated lip oil seal with reflow lines on the lip, the structure is as described in Example 1, the difference is that: the helical angle of the outwardly convex reflow lines 5 is 5°, and the normal cross section of the outwardly convex reflow lines 5 is an arc Shaped surface, the height is 0.1mm, and the groove width between adjacent convex reflow lines is 0.35mm.

[0062] Wherein, the width of the lip base surface 14 is 0.6 mm, that is, the axial distance between the two closed sinusoidal curves constituting the lip base surface is 0.6 mm.

Embodiment 3

[0064] Such as Figure 4 to Figure 7 As shown, a three-dimensional modeling method of a corrugated lip oil seal with reflow lines on the lip as described in Example 1, the corrugated lip oil seal is mainly composed of air side cylinder 12, air side lip side 13, lip base surface 14. The oil side lip side 15, the oil side cylindrical surface 16 and other simple curved surfaces (cylindrical surface, torus) constituting the oil seal, wherein the lip base surface 14 is composed of a cylindrical sine curve a9 and a cylindrical sine curve b8 The oil side lip side 15 is surrounded by the cylindrical sine curve b8 and the cylindrical sine curve c7, the oil side cylinder 16 is surrounded by the cylindrical sine curve c7 and the circle d6, and the air side lip side 13 is surrounded by the cylindrical The sinusoidal curve a9 is surrounded by the cylindrical sinusoidal curve f10, and the air-side cylinder 12 is surrounded by the cylindrical sinusoidal curve f10 and the circle e11.

[0065...

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Abstract

The invention relates to a wave-shaped lip oil seal with backflow stripes at a lip opening and a three-dimensional modeling method. Inclined outwards convex backflow stripes are arranged at the lip opening part of the wave-shaped lip oil seal; the oil seal integrates the advantages of the wave-shaped lip oil seal and the backflow stripe oil seal; specific good dynamic pressure performance of the wave-shaped lip oil seal is realized; the characteristic of good oil pumping effect of the backflow stripe oil seal is reserved; the problem of poor abrasion resistance of the lip opening of the wave-shaped lip oil seal is also solved. The oil seal three-dimensional modeling method based on a circumferential uncoiling conversion principle provided by the invention has the advantages that the wave-shaped lip oil seal precise three-dimensional solid modeling problem difficult to be completed by the existing CAD (computer-aided design) software is changed into a relatively simple half three-dimensional oil seal solid model modeling problem capable of being easily realized by the existing CAD software; conditions are provided for the design manufacturing and the simulation analysis of the wave-shaped lip oil seal; wide application values are realized.

Description

technical field [0001] The invention relates to a corrugated lip oil seal with reflow lines on the lip and a three-dimensional modeling method, belonging to the technical field of seals. Background technique [0002] The oil seal is the most complex and important rubber component in the rotary seal, and it is also one of the most commonly used seals. It has been widely used in large aerospace, aviation, petroleum, chemical and other equipment, as small as daily pumps, pipe valves, bearings and other parts. In order to solve the leakage problem of the oil seal and improve the sealing effect of the oil seal, in the early 1960s, a hydrodynamic oil seal with "pumping effect" was successfully developed abroad, which made a great leap in the performance of the oil seal. [0003] Among the existing hydrodynamic oil seals, the two types with the best effect are backflow pattern oil seal and wave lip oil seal. The backflow pattern oil seal is a molded backflow pattern (pattern) on ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20
Inventor 李学艺赵丹丹丁淑辉张国鹏王坤韩文广王宁宁张庆雪
Owner SHANDONG UNIV OF SCI & TECH
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