柔性石墨缠绕垫片与柔性石墨金属齿形垫片密封影响因素正交试验及模拟对比

Orthogonal Test and Finite Element Simulation Comparison of the Influencing Factors of Gasket Sealing between Spiral-wound Metal Gasket and Metal Serrated Gasket with Soft Graphite

采用正交试验设计和有限元模拟方法,研究螺栓预紧力、压力和温度对柔性石墨缠绕垫片与柔性石墨金属齿形垫片密封性能的影响,研究对比两种垫片所使用螺栓预紧力范围大小。结果表明:与柔性石墨缠绕垫片相比,柔性石墨金属齿形垫片可在更大的螺栓预紧力范围下使用,降低了螺栓安装难度。研究对比两种垫片在高温压力波动工况下,应力和变形的变化趋势,结果表明:相比柔性石墨缠绕垫片,柔性石墨金属齿形垫片更适用于压力波动工况,而柔性石墨缠绕垫片更适用于温度较苛刻工况。

Both orthogonal test and finite element simulation were adopted in the investigation into the effects of bolt preload,pressure and temperature on the sealing performance of the spiral-wound metal gasket with graphite and metal serrated gasket with graphite.The range of bolt preload used in the two gaskets was studied and compared to show that,compared with spiral-wound metal gasket with graphite,the metal serrated gasket with graphite can be used under a wider range of bolt preload,which reduces the difficulty in the bolt installation.Comparing the change of stress and deformation of the two gaskets under high temperature and pressure fluctuation conditions showed that,as compared to the spiral-wound metal gasket with soft graphite,the metal serrated gasket with soft graphite is more suitable for pressure fluctuation conditions;and the spiral-wound metal gasket with soft graphite is more suitable for the harsh temperature conditions.