Shaft end O-shaped sealing ring with excellent bearing capability

Abstract

The invention discloses a shaft end O-shaped sealing ring with an excellent bearing capability. The raw materials of the sealing ring comprise, by weight, 20-40 parts of tetrafluoroethylene-propylene rubber, 15-35 parts of methyl vinyl silicone rubber, 15-35 parts of polyether polyurethane rubber, 20-40 parts of butadiene rubber, 0.8-1.6 parts of dicumyl peroxide, 0.5-1.5 parts of 1,2-polybutadiene, 0.2-1.2 parts of zinc dimethacrylate, 55-70 parts of modified nano montmorillonite, 15-20 parts of white carbon black, 1-10 parts of polytetrafluoroethylene fibers, 10-20 parts of carbon fibers, 10-20 parts of nano-kaolin, 2-10 parts of mica powder, 5-15 parts of glass fibers, 0.5-1.8 parts of di(dioctylpyrophosphato) ethylene titanate, 0.5-1.5 parts of triphenyl phosphate, 0.5-1.5 parts of dibutyl phthalate, 0.5-1.5 parts of beeswax and 0.5-1.5 parts of antioxidant.

Description

technical field [0001] The invention relates to the technical field of sealing rings, in particular to an O-shaped rubber sealing ring at a shaft end with excellent pressure bearing capacity. Background technique [0002] The engineering requires high sealing performance. If the sealing ring fails, it will cause problems such as air leakage and liquid leakage, which will directly affect the operation of the entire machine. For the sealing between the rotating parts, the O-shaped rubber sealing ring is due to its low cost and structure. The advantages of simplicity and easy installation have been widely used. Since the seal of the shaft end is a dynamic seal, the shaft sleeve rotates with the shaft, and there is friction between the seal ring and the seal ring. The stress relaxation of the seal ring is easy. will rise, the O-ring at the shaft end is prone to compression permanent deformation and hot air aging, and has higher requirements for pressure bearing capacity. SUMMA...

AI Technical Summary

Problems solved by technology

[0002] The engineering requires high sealing performance. If the sealing ring fails, it will cause problems such as air leakage and liquid leakage, which will directly affect the operation of the entire machine. For the sealing between rotating parts, the O-shaped rubber sealing ring is used because of its low cost and structure. The advantages of simplicity and easy installation have been widely used. Since the seal at the shaft end is a dynamic seal, the shaft sleeve rotates with the shaft, and there is friction between the seal ring, and the seal ring is prone to stress relaxation. At the same time, the internal air pressure and oil pressure of the equipment are will rise, the O-ring at the shaft end is prone to compression permanent deformation and hot air aging, and has higher requirements for pressure bearing capacity