螺栓法兰连接的金属透镜垫的自紧能力分析  

Analysis on self-tightening capacity of metal lens gasket connected by bolted flanges

作　　者：弓海霞[1] 徐折贵 石长伟 王肃 

机构地区：[1]哈尔滨工程大学机电工程学院,黑龙江哈尔滨150001

出　　处：《华中科技大学学报（自然科学版）》2015年第3期123-127,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51105088)

摘　　要：分析了螺栓法兰连接的金属透镜垫在预紧状态和工作状态下的变形情况,以及透镜垫与螺栓法兰的变形协调关系,将金属透镜垫与螺栓法兰刚度引入透镜垫法兰连接的力学计算中,推导出了金属透镜垫自紧系数计算公式,结果表明金属透镜垫自紧系数与金属透镜垫及螺栓法兰刚度有关.采用Hertz接触理论推导出了关于透镜垫密封接触环中心最大接触压力的螺栓法兰预紧载荷与工作载荷计算公式.通过接触力学实验验证了公式的正确性,为水下密封工程中较大直径透镜垫的设计提供参考依据.Deformation conditions of metal lens gasket connected by the bolted flanges in the preloaded state and work state and the coupled deformation between the lens gasket and bolted flanges were analyzed,stiffness of metal lens and bolted flanges was introduced into the connection mechanics calculation,the formulae for calculating coefficients of metal lens gasket self-tightening was deduced and the results show that the metal lens gasket self-tightening coefficient relates to stiffness of the metal lens gasket and the bolted flanges.Pre-tightening load and work load calculation formula for the bolted flange with the maximum contact pressure in the center of the lens gasket contact ring was deduced by using Hertz contact theory as well.The formula was validated by a contact mechanics experiment.This work could be used as reference for design of large diameter lens gasket in underwater engineering.

关 键 词：金属透镜垫 密封 自紧能力 螺栓法兰 接触力学 载荷计算 

分 类 号：TH136[机械工程—机械制造及自动化]