橡胶黏弹性对橡胶O形圈密封性能的影响

A study of the performance of an O-ring seal with viscoelasticity

运用Ansys软件对橡胶密封圈进行瞬态动力学分析,研究橡胶材料的黏弹性对橡胶密封圈密封性能的影响。利用APDL参数化语言施加位移载荷,模拟橡胶密封结构在常温下的压缩追随性能,并在此基础上研究了橡胶O形圈的截面直径、间隙张开量、间隙张开时间、压缩率和压力对密封圈密封性能的影响。通过观察O形圈上表面的接触压力随时间的变化,探索在考虑振动工况和材料黏弹性的情况下O形密封圈的设计依据。研究结果表明,密封圈截面直径越大,其回弹时间越长,回弹量越小,压缩率、内压及密封面接触压力越大,追随间隙波动能力和密封性能越好。

Ansys with transient dynamics analysis of a rubber sealing ring has been used to study how the viscoelasticity of rubber materials can affect the performance of the rubber sealing ring. A displacement load is applied by APDL to simulate the compression performance of the seal structure at room temperature,and to study the effect of varying the O-ring cross section diameter,the magnitude of the gap opening,the gap opening time,the compression ratio,and the pressure on the performance of the O-ring seal. The variation in the contact pressure of the Oring surface with time was observed in order to explore the design principles of the O-ring in terms of vibration and viscoelasticity. The results show the larger the ring cross section diameter,the longer the spring back time,the smaller the spring back amount,the greater the compression ratio and the greater the internal pressure,leading to a greater sealing surface contact pressure and improved adaptability for following gap fluctuation and sealing performance.