Shaft end O-shaped sealing ring with compression permanent deformation resistance

Abstract

The invention discloses a shaft end O-shaped sealing ring with compression permanent deformation resistance. The raw materials of the sealing ring comprise, by weight, 40-55 parts of tetrafluoroethylene-propylene rubber, 20-35 parts of methyl vinyl silicone rubber, 10-30 parts of styrene butadiene rubber, 15-30 parts of polyimide resin, 0.5-1.5 parts of 1,1-bi(t-butylperoxy)-3,3,5-trimethyl-cyclohexane, 1-1.5 parts of diphenylmethane bismaleimide, 0.2-0.8 part of ethylene glycol diacrylate, 50-100 parts of modified nano montmorillonite, 10-30 parts of white carbon black, 15-30 parts of polytetrafluoroethylene fibers, 1-5 parts of nano silicon oxide, 2-8 parts of nano kaolin, 10-20 parts of graphite powder, 5-10 parts of nano calcium carbonate, 2-8 parts of isopropyl tri (dioctylpyrophosphato) titanate, 1-3 parts of triphenyl phosphate, 1-3 parts of dibutyl phthalate, 1-3 parts of disproportionated rosin and 1-2 parts of anti-aging agent. The shaft end O-shaped sealing ring has good compression permanent deformation resistance and has an excellent bearing capability.

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 resistant to compression permanent deformation. 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 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 when the equipment is running The O-ring at the shaft end is prone to compression permanent deformation and hot air...

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