缠绕垫片外环发生翘曲的原因分析  

Analysis on the Outer Ring Bending of Spiral Wound Gasket

作　　者：由立臣[1] 任大美[1] 郑康宁[1] 

机构地区：[1]燕山大学环境与化学工程学院,河北秦皇岛066004

出　　处：《润滑与密封》2011年第10期87-89,97,共4页Lubrication Engineering

摘　　要：建立缠绕垫片外环V型槽不对称情况下外环的受力模型,并进行受力分析和弯矩作用下的强度计算。通过理论计算,证明缠绕垫片外环V型槽不对称时,存在一个弯矩,使缠绕垫片外环发生翘曲,从而减小对缠绕垫片本体的回弹作用,影响缠绕垫片的密封性能,这是外环翘曲缠绕垫片容易产生泄漏的主要原因;根据材料的许用应力求出临界弯矩和临界偏移量,以及在临界弯矩下外环的最大挠度,从而可防止外环发生翘曲变形,对缠绕垫片的生产、标准制定具有指导意义。The force model of the spiral wound gasket outer ring when the V-type groove is asymmetric was establish ,the force analysis and the calculation of strength under the bending moment were carried out. The theoretical Calculation proves that there is a moment in the spiral wound gasket outer ring when the V-type groove is asymmetric, which makes the spiral wound gasket outer ring bend. Consequently, this bend diminishes the spring back effect to the body of the spiral wound gasket, influences the sealing performance, and it is the main factor which leads the leakage of spiral wound gasket. To figure up the critical moment, the critical offset value and the maximum deflexion under the critical moment according to the material allowable stress, the spiral wound gasket outer ring bend can be prevented. It is a guidance on the production of the spiral wound gasket and drafting the standards.

关 键 词：缠绕垫片 外环 V型槽 不对称 弯矩 

分 类 号：TQ055.83[化学工程]