刘阳,雷基林,邓晰文,等.基于热障涂层的柴油机活塞热分析研究[J].内燃机工程,2021,42(3):67-73.
基于热障涂层的柴油机活塞热分析研究
Research on Thermal Analysis of Piston in Diesel Engine Based on Thermal Barrier Coating
DOI：10.13949/j.cnki.nrjgc.2021.03.010
关键词:热障涂层  柴油机  活塞  热分析
Key Words:thermal barrier coating  diesel engine  piston  thermal analysis
基金项目:国家自然科学基金重点项目(51665021、51965027、51805233)；云南省应用基础研究计划(2019FD032)
作者单位E-mail
刘阳 昆明理工大学 交通工程学院 2426076363@qq.com 
雷基林* 昆明理工大学 交通工程学院 leijilin@sina.com 
邓晰文 昆明理工大学 交通工程学院  
牛小强 昆明理工大学 交通工程学院  
文均 成都银河动力有限公司  
温志高 成都银河动力有限公司  
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摘要:以某非道路高压共轨柴油机作为研究对象，结合标定工况下活塞温度场试验测试结果，建立了不同厚度的热障涂层活塞有限元仿真分析模型，分析了热障涂层对活塞基体温度场、热应力及热变形的分布特点和变化规律。结果表明，热障涂层活塞的最高温度较铝合金活塞最大降幅14.83%；热障涂层活塞的热应力随瓷层厚度的增加而降低，较铝合金活塞有最大42.44%的降幅；活塞在沿销轴方向的径向热变形大于垂直于销轴方向的径向热变形，变化幅度的差异导致活塞热变形不均匀性的产生。
Abstract:A non-road high pressure common rail diesel engine was taken as the research object. Based on the results of piston temperature test under calibration power condition, finite element simulation model of piston with different thickness of thermal barrier coating was established. The distribution characteristics and changes law of the thermal barrier coating on the temperature field, thermal stress and thermal deformation of the piston matrix were analyzed. Research results show that, the maximum temper-ature of the thermal barrier coating piston has the largest decrease of 14.83% compared with the aluminum alloy piston. The thermal stress of the thermal barrier coating piston decreased with the increase of the ceramic layer thickness, and it has the largest decrease of 42.44% compared with the aluminum alloy piston. The radial thermal deformation of the piston in the direction parallel to the axis of pin hole is greater than in the direction perpendicular to the axis of pin hole, and the difference in the magnitude of the change results in uneven thermal deformation of the piston.
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