气动截止阀密封材料探讨

Research on Seal Material for Pneumatic Cut-off Valve

气动截止阀借助气动执行器快速运动,产生较大密封比压,达到密封效果。与此同时,存在冲击特性,现有软密封结构使用寿命较短。如果用于较高压力或含颗粒介质流工况,则寿命更短,甚至无法正常使用。采用工程塑料改性技术,研制一种新型高分子材料,用作程控气动截止阀密封件,经实际使用考核,可以满足输送含颗粒介质流,日常温度工况,使用寿命不小于100万次的要求。同时价格明显低于PTEE,PPL,较之PEEK更是数量级差距。也可用于其它类型阀门密封。

Pneumatic cut-off valve with the fast movement of pneumatic actuator, obtains a greater sealing pressure ratio and achieves a better sealing effect. At the same time, there is an impact characteristics, so the soft seal life of the existing structure is short. What is worse, that the life is much shorter or even it does not work properly, if it is used for the working condition of higher pressure or of granular media. Using engineering plastics modification technology, the development of a new type of polymer material can be used as a program-controlled pneumatic valve seals. The pratical use for assessment to meet the transportation containing the flow of granular media shows that that life is not less than one million times, when the working condition is at daily temperature. Moreover, the price is significantly lower than PTEE, PPT, and comparing with PEEK the price gap is in orders of magnitude. The research result in this paper can also be used for other types of valve seal.