基于耦合分析法的涡轮增压器浮环轴承数值仿真  

Numerical simulation on floating ring bearing of turbocharger based on coupled analysis method

作　　者：胡辽平[1] 龚金科[1] 贾国海[1] 章滔[1] 蔡皓[1] 王曙辉[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082

出　　处：《中南大学学报（自然科学版）》2013年第3期992-997,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51176045);湖南大学汽车车身先进设计制造国家重点实验室自主课题(61075002)

摘　　要：基于以往对涡轮增压器的耦合分析中大都忽略涡轮增压器轴承体的导热,或者将导热过程简化,得到的结果误差较大的实际情况,将涡轮增压器轴承体、浮环轴承、涡轮轴、润滑油、冷却水作为一个耦合体,考虑各部件及相应物理场间的耦合关系,采用耦合分析法建立涡轮增压器轴承体的三维非稳态耦合数值仿真模型。该模型以三维瞬态热传导模型、动压润滑模型和润滑油膜传热模型为基础,对某型涡轮增压器浮环轴承的热、润滑、摩擦耦合进行分析,得到浮环轴承的温度场和应力场,并用试验证实耦合仿真模型的正确性,为涡轮增压器的优化设计提供参考依据。Based on the fact that the turbocharger bearing body heat was mostly oversight in the past coupled analysis,or the heat conduction process was simplified,so the results error was big,taking the turbocharger bearing body,the floating ring bearing,the turbine shaft,the lubricating oil and the cooling water as a coupling body,considering the various parts and the coupling relationship of corresponding physical field,the three-dimensional unsteady numerical simulation model of the turbocharger bearing body was established using the coupled analysis method.Taking the three-dimensional transient heat conduction model,the hydrodynamic lubrication model and the lubricating oil film heat transfer model as the foundation,the floating ring bearing of turbocharger was analyzed with heat transfer,lubrication and friction, temperature field and stress field of the floating ring bearing were obtained.The tests confirm the correctness of the coupling simulation model.It provides the reference for turbocharger optimization design.

关 键 词：涡轮增压器 浮环轴承 导热 耦合分析 数值仿真 

分 类 号：TK411.8[动力工程及工程热物理—动力机械及工程]