全铝制低温水箱冷热冲击耐久性优化设计  

Optimization Design of Thermal Shock Durability for All Aluminum Low-Temperature Water Tank

作　　者：任远林 任永兵 刘凯 张琳 Ren Yuanlin;Ren Yongbing;Liu Kai;Zhang Lin(ESTRA Automotive Air-conditioning Systems(Shanghai)Co.,Ltd.,Shanghai 201204)

机构地区：[1]上海爱斯达克汽车空调有限公司,上海201204

出　　处：《汽车工艺与材料》2024年第12期50-55,共6页Automobile Technology & Material

摘　　要：为解决冷热冲击试验中全铝制低温水箱扁管泄漏的问题,分别提出了扁管加宽、改O型集流管和增加隔板3种设计调整方案,并使用有限元分析软件Abaqus对原设计方案以及3种调整方案下的全铝制低温水箱进行有限元分析(FEA),得到泄漏区域内扁管的最大局部应力和最大塑性应变及其分布情况,以冷热冲击寿命和扁管泄漏的数量和位置为考查指标进行冷热冲击台架试验,结果表明,冷热冲击寿命与最大局部应力和塑性应变成反比,试验件泄漏扁管位置与局部应力及塑性应变分布规律一致,FEA结果与试验验证结果一致性较好。因此,为延长全铝制低温水箱冷热冲击寿命,方案顺序优化为使用O型集流管、使用窄扁管、使用双隔板。In order to solve the problem of the leakage of the flat tube of the all-aluminum low-temperature water tank in the thermal shock test,this article proposes 3 design adjustments,namely,widening the flat tube,changing the O-type collector tube and adding the spacer plate.Finite element analysis software Abaqus is used on the original design scheme and all-aluminum low-temperature water tank under 3 kinds of adjustment scheme for Finite Element Analysis(FEA)analysis,to get the maximum local stress of the flat tube at the leakage area and the maximum plastic strain and its distribution.Thermal shock bench tests are conducted using thermal shock life and the number and location of flat tube leaks as indicators.The results show that the thermal shock life is inversely proportional to the maximum local stress and plastic strain.The location of the leaking flat pipe of the test piece is consistent with the local stress and plastic strain distribution pattern,and the FEA simulation analysis is in good agreement with the test verification.Therefore,in order to extend the thermal shock life of the all-aluminum low temperature water tank,the program sequence is optimized as follows:use of O-type collector tubes,use of narrow flat tubes and use of double bulkheads.

关 键 词：全铝制低温水箱 冷热冲击寿命 局部应力 塑性应变 

分 类 号：U465.22[一般工业技术—材料科学与工程]