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An oil seal that reduces lip pressure

An oil seal and pressure technology, which is applied in the direction of engine seal, engine components, mechanical equipment, etc., can solve the problems of friction heat generation, rubber wear, rubber wear friction heat generation, etc., and achieve the effect of intensified wear and friction heat generation

Active Publication Date: 2015-10-21
山东钧策科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the tightness is a necessary condition to ensure the seal, the tightness will also have a negative impact on the lip of the oil seal, that is, heat generated by friction, resulting in rubber wear and aging
Especially in the case of high-speed rotation and pressure, the pressure will further increase the holding force of the oil seal lip on the shaft. High-speed rotation will accelerate rubber wear and frictional heat generation under the condition of increased holding force, resulting in short-term failure of the oil seal. internal failure

Method used

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  • An oil seal that reduces lip pressure
  • An oil seal that reduces lip pressure
  • An oil seal that reduces lip pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An oil seal that can reduce lip pressure, the oil seal includes a support ring 1, an elastic material 2 wrapped outside the support ring 1 and a sealing lip 3 extended from the elastic material 2 outside the support ring 1, the sealing lip The inner side of 3 is provided with a groove 31, and a spring 32 is arranged in the groove 31; the oil seal also includes a pair of friction parts 4, and the friction part 4 includes a cylinder part 41, a cylinder lower end retaining part 42 and a cylinder The upper cross section 43, the outer end of the upper cross section 43 of the cylinder is bent downward to form the outer cylinder 44; the outer cylinder 44 is inserted into the cavity between the support ring 1 and the sealing lip 3 , and there is a gap 11 between the outer cylinder part 44 and the support ring 1, the sealing lip 3 is an interference fit with the outside of the cylinder part 41 to achieve sealing; the inner hole of the cylinder part 41 and the rotating The part 5...

Embodiment 2

[0032] Repeat Example 1, the difference is: the cross-sectional shape of the spiral groove 12 is a triangle with rounded corners.

Embodiment 3

[0034] Repeat Example 1, the difference is: the cross-sectional shape of the spiral groove 12 is trapezoidal.

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PUM

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Abstract

The invention discloses an oil seal capable of lowering pressure of a lip. The oil seal comprises supporting rings, elastic materials coated outside the supporting rings, and the sealing lip formed by extending of the elastic materials outside the supporting rings, grooves are formed in the inner side of the sealing lip, and a spring is arranged in each groove. The oil seal is characterized in that the oil seal further comprises opposite friction members, each opposite friction member comprises a barrel portion and a barrel lower-end fold stopping portion and a barrel upper transverse face portion, the outer ends of the barrel upper transverse face portions are bent downwards to form outer barrel portions which are inserted into cavities between the supporting rings and the sealing lips, gaps are reserved between the outer barrel portions and the supporting rings, and the sealing lip and the outer sides of the barrel portions are in interference fit. The oil seal capable of lowering the pressure of the lip can guarantee internal space of the oil seal to be constantly maintained at stable and proper pressure, so that increasing of clasping force of the oil seal and aggravating of heat generation by abrasion and friction caused by overlarge pressure are avoided.

Description

technical field [0001] The invention relates to an oil seal, in particular to an oil seal capable of reducing lip pressure. Background technique [0002] The rotary shaft lip seal ring is mainly used to seal between the parts that rotate relatively, and prevent the lubricating oil inside the mechanical equipment from leaking out. A conventional oil seal consists of a support ring, a rubber body and a spring, where the spring and the rubber body with a specific shape form the main sealing lip to seal the shaft. After the oil seal is assembled, the elastic lip part made of rubber is in interference fit with the rotating shaft to produce a certain holding force on the shaft. It is precisely because of the existence of the holding force that the oil seal can maintain the sealing effect during long-term use. Although the tightness is a necessary condition to ensure the seal, the tightness will also have an adverse effect on the lip of the oil seal, that is, heat generated by fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/40F16J15/32F16J15/3208
Inventor 张明森
Owner 山东钧策科技服务有限公司