Low-friction reciprocating motion seal component

Abstract

The invention relates to the technical field of seal components and particularly discloses a low-friction reciprocating motion seal component. The low-friction reciprocating motion seal component comprises an annular support frame and an annular elastic seal body, wherein the annular elastic seal body comprises at least one seal lip. The low-friction reciprocating motion seal component is characterized in that a concave-convex girdle is arranged on an annular seal surface on which the seal lip is formed, and a plurality of projections or pits are arranged on the concave-convex girdle; the seal lip comprises a first seal lip and a second seal lip, and a first concave-convex girdle and a second concave-convex girdle are respectively arranged on annular seal surfaces which are formed by the first seal lip and the second seal lip; the projections or the pits are in a shape of a semi-sphere, a box, a truncated cone or a polygonal frustum. The low-friction reciprocating motion seal component has the beneficial effects that friction between the seal body and a shaft is reduced under the condition of ensuring that the seal body has sufficient radial seal pressure, so that the motion friction of a reciprocating mechanism is reduced; the service lives of the seal body and the motion shaft are prolonged under the condition of ensuring seal.

Description

technical field [0001] The invention relates to a seal, in particular to a low-friction reciprocating seal. Background technique [0002] The reciprocating hydraulic structure is a common part of modern vehicles and construction machinery. The lip structure and wear resistance of the reciprocating shaft seal are very important to the service life of the reciprocating hydraulic structure. The sealing ability of the seal depends on the thickness of the oil film on the sealing surface. If the thickness of the oil film between the sealing lip and the shaft is too large, the seal is prone to leakage; if the thickness is too small, dry friction may occur, causing wear of the seal and the shaft. For example, during the use of automobile shock absorbers, due to the high friction of the seals, the reciprocating hydraulic structure often has problems such as oil leakage, abnormal noise, and poor durability. But at the same time, in order to realize the sealing of the internal sealing...

AI Technical Summary

Problems solved by technology

The patent number is 201320268503, which is an invention patent for a low-friction shock absorber. By setting axial parallel lines on the sealing surface of the seal to reduce the contact area between the sealing surface and the shock absorber shaft, thereby reducing both Compared with ordinary shaft seals, the friction force between them has been greatly improved, but there are also the following deficiencies: First, the simple axial parallel thread structure can be used under different working conditions, especially when the sealed medium is sealed. In the working condition where the main sealing lip faces upward, the lubricant inside the axial parallel grooves may be heated to cause poor sealing drainage; the second is due to the formation of axial oil storage grooves between the axial parallel grooves , although it is beneficial to form a critical lubricating oil film between the sealing surface and the shock absorber shaft, these axial grooves will also promote the loss of lubricating oil with the axial reciprocating motion, resulting in early dry wear and failure of the seal

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