非接触式加强环间隙对膨胀节高温强度的影响  

Influence of non-contact stiffening ring gap on high temperature strength of expansion joint

作　　者：罗炳亮 王云[1,2] 闫朝 杨蓓 LUO Bingliang;WANG Yun;YAN Zhao;YANG Bei(School of Aircraft Engineering,Nanchang Hangkong University,Nanchang 330063,China;School of Aeronautical Engineering,Taizhou University,Taizhou 318000,China)

机构地区：[1]南昌航空大学飞行器工程学院,南昌330063 [2]台州学院航空工程学院,浙江台州318000

出　　处：《压力容器》2021年第8期60-65,80,共7页Pressure Vessel Technology

基　　金：国家自然科学基金项目(51766011)。

摘　　要：为应对高温高压的复杂工况,提高膨胀节的承载能力,工程上使用带加强环的加强型波纹管膨胀节。目前对加强型波纹管膨胀节的强度性能研究,并没有考虑加强环与波纹管之间装配间隙的影响,并且忽略了高温工况下波纹管内外表面温差产生的热应力。采用完全热力耦合数值分析法,开展加强环与波纹管间隙对膨胀节高温强度影响研究,得到膨胀节在不同温差下最大Mises应力随加强环与波纹管间隙值的变化规律。通过选择加强环与波纹管之间的最优间隙,可以有效提高膨胀节的强度性能,且由于波纹管内外表面温差不同,加强环间隙取值不同。该结论为高温高压工况下加强型波纹管膨胀节的理论研究、优化设计及制造提供参考。In order to cope with the complex working conditions of high temperature and high pressure and improve the bearing capacity of the expansion joint,the reinforced bellows expansion joint with stiffening ring is often used in engineering.At present,the effect of assembly gap between the stiffening ring and the bellows is not considered in the study of strength performance of the bellows expansion joint,and the thermal stress caused by the temperature difference between the inner and outer surfaces of the bellows is neglected under high temperature conditions.The effect of the gap between the stiffening ring and bellows on the high temperature strength of the expansion joint was studied by means of fully coupled thermodynamic numerical analysis.The change law of the maximum Mises stress of the expansion joint with the gap between the stiffening ring and bellows at different temperature differences was obtained.The strength performance of the expansion joint can be effectively improved by selecting the optimum gap between the stiffening ring and bellows,and the value of the gap between the stiffening ring and bellows is different because of the temperature difference between the inner and outer surfaces of the bellows.The conclusion provides a reference for the theoretical research,optimal design and manufacture of the expansion joint with reinforced bellows under high temperature and high pressure.

关 键 词：波纹管膨胀节 强度 加强环间隙 热力耦合 

分 类 号：TH114[机械工程—机械设计及理论] TQ055.8[化学工程]