Two-way sealing rotating oil seal for vehicle

Abstract

The invention relates to a two-way sealing rotating oil seal for a vehicle. The oil seal comprises a hollow cylindrical inner oil seal body with an end surface outwards extending at the upper end, and an outer oil seal body positioned below the outer side; and the outer side and the inner side end surface of the outer oil seal body are both connected with a rubber elastomer. The oil seal is characterized in that one side, near the inner oil seal body, of the rubber elastomer is boned with a PTFE lip piece; a radial main sealing lip is arranged at the contact part of the PEFT lip piece with the outer circular surface of the inner oil seal body; and an axial main sealing lip is arranged at the contact part of the rubber elastomer with the end surface of the inner oil seal body. The oil seal has the following beneficial effects: the axial sealing and the radial sealing are synchronously realized; the axial sealing can promote the jump resistance of products; the radial sealing can promote the displacement resistance of the products; PTFE and the rubber elastomer are adopted to vulcanize; and the rubber elastomer makes up the defect of weak followup performance of the PEFT lip piece in axial sealing, and can guarantee excellent contact between an axial sealing lip opening and the end surface of the inner oil seal.

Description

technical field [0001] The invention relates to an oil seal for vehicles, in particular to a bidirectional sealing rotary oil seal for vehicles, which belongs to the technical field of oil seals. Background technique [0002] Rotary oil seals for vehicles, especially the dynamic seals in the engine that are in contact with the external environment are mainly the front and rear oil seals of the crankshaft, such as figure 1 As shown, at the same time, the operating conditions of the front and rear oil seals of the crankshaft are relatively the most complicated, and account for the highest proportion in the feedback of the engine due to seal failure. [0003] However, with the continuous development of the industry, the continuous maturity of the automobile manufacturing industry and the continuous improvement of the government's environmental pollution requirements, the engine manufacturing is forced to continue to update and break through. In recent years, with the advanceme...

AI Technical Summary

Problems solved by technology

The sealing lip of the axial sealing structure is mostly rubber elastic body, which is characterized by poor dry wear resistance of the rubber material, and the oil seal of the axial sealing structure has poor resistance to axial movement and high resistance to radial runout and eccentricity.

The sealing lip of the radial seal structure is mostly made of rubber elastomer or PTFE material, which is characterized by strong resistance to axial movement, but the resistance to radial runout and eccentricity is not as good as that of the axial seal structure, so the simple axial seal structure design And the simple radial seal structure design can no longer meet and adapt to the sealing requirements of low friction and long life under the condition that the axial movement, radial runout and eccentricity are required to be higher and higher.

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