不同活塞杆用密封件应力松弛现象研究

Stress Relaxation Research of Seals for Different Piston Rods

该文利用广州机械科学研究院有限公司自有的油封径向力测试仪以及定制加工的轴套对Y圈,轴用方形圈,轴用阶梯圈以及V组等4种不同类型的活塞杆用橡塑密封件在特定温度下以及在宽温域下的应力松弛现象进行了研究。结果表明,随着温度的升高以及时间的推移,4种同一轴径、不同材料、不同结构形式的活塞杆用密封件均出现了应力松弛的现象,且不同密封件,其径向力初始值以及应力松弛的规律不同。

This paper studies the stress relaxation of Y-ring,square ring,step ring and V-group,four different types rubber and plastic seals at specific temperatures and over a wide temperature range,which utilizing the oil seal radial force tester of Guangzhou Mechanical Engineering Research Institute Co.,Ltd.and the custom-made bushings.The results show that,with the increase of temperature and the passage of time,it has stress relaxation phenomenon of four types of piston rod seals with the same shaft diameter,different materials and different structural forms.And different seals,the initial value of radial force and the law of stress relaxation are different.