Shaft end O-shaped permanent compression set resisting rubber sealing ring

Abstract

The invention discloses a shaft end O-shaped permanent compression set resisting rubber sealing ring. Raw materials of the shaft end O-shaped permanent compression set resisting rubber sealing ring comprise, by weight, 30-60 parts of tetrapropyl fluoro rubber, 10-20 parts of nitrile butadiene rubber, 10-20 parts of polyether polyurethane rubber, 15-25 parts of styrene butadiene rubber, 1.2-2.5 parts of dicumyl peroxide, 2.5-4 parts of trimethylolpropane triacrylate, 0.8-1.7 parts of N,N'-p-phenylbimaleimide, 50-75 parts of modified nanometer montmorillonite, 20-45 parts of white carbon black, 20-40 parts of polytetrafluoroethylene, 5-12 parts of nanometer silica, 5-12 parts of nanometer kaolin, 5-12 parts of graphite powder, 5-12 parts of glass fibers, 0.8-1.6 parts of di(dioctylpyrophosphato)ethylene titanate, 0.9-1.8 parts of triphenyl phosphate, 0.9-1.8 parts of dibutyl phthalate, 0.9-1.8 parts of microcrystalline paraffin and 0.5-1.5 parts of an antioxidant.

Description

technical field [0001] The invention relates to the technical field of sealing rings, in particular to an O-shaped rubber sealing ring resistant to permanent compression deformation at a shaft end. 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