The reliability of seal is one of the key factors for the safety and reliability of hydraulic support,and it is very important to prevent seal failure.The wiper-ring takes up a large proportion in the failure of seal,mainly because the wiper-ring is taken out of the groove or the lip of the wiper-ring is opened under the condition of side load,and the dust and coal dust enter the guide sleeve,the rod seal located in the inner side of the wiper-ring is damaged by dust and coal dust.Through the analysis and research of the material and structure of the wiper-ring,the stability of the wiper-ring is improved and the dustproof effect is enhanced.
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