Combined sealing ring with high sealability and low torque

Abstract

The invention relates to a combined sealing ring with high sealibility and a low rotary torque. The combined sealing ring consists of an inner framework, a rubber body and a dust cover, wherein the inner framework and the dust cover form a sealing cavity; the sealing rubber body is placed in the sealing cavity; the sealing rubber body comprises a rubber main body with the shape matched with the shape of the inner framework, and a main lip, an auxiliary lip and a double side lip structure that extend from the rubber main body; the auxiliary lip is in interference fit with an inner wall of the dust cover; the double side lip structure comprises a first side lip and a second side lip; and the first side lip and the second side lip are in interference fit with the inner wall of the dust cover. According to the combined sealing ring, as the double side lip structure is adopted based on the existing combined sealing ring, the radial magnitude of interference of the main lip is reduced, and friction between the sealing lips and the dust cover, and the rotary torque are reduced. According to inelastic FEM (Finite Element Method) analysis, the waist shapes of the side lips are scientifically designed, the rubber lips are automatically and elastically recovered and compensated after being abraded, and the sealibility is not reduced.

Description

technical field [0001] The invention relates to a component applied to a bearing unit with low torsion and high sealing performance, in particular to a combined sealing ring with high sealing and low rotational torque. Background technique [0002] The development of automobiles has higher and higher requirements for reducing energy consumption and muddy water resistance. As important rotating parts, ball and tapered bearing units for hubs can directly reduce energy consumption of automobiles due to their low rotational torque. For vehicles with very different environments (desert, rainforest, severe cold, intense heat, etc.), it is required that the sealing ring of the bearing not only meet low torque but also maintain high sealing performance. [0003] Most of the existing sealing rings have defects such as large friction torque between the sealing lip and the dust cover, and poor sealing effect. Contents of the invention [0004] In view of the defects existing in the ...

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Problems solved by technology

[0003] Most of the existing sealing rings have defects such as large friction torque between the sealing lip and the dust cover, poor sealing effect, etc.

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