张健健1，2，马敏1，2，李伟1,3，王孝丽1，2

1.康跃科技（山东）有限公司，山东寿光262718；2.机械工业内燃机增压系统重点实验室，山东寿光262718；3.山东大学能源与动力工程学院,山东济南250061

摘要：为研究涡轮增压器止推轴承评估及选用方法，利用数值模拟建立某型号涡轮增压器的有限元模型，使用NUMECA软件对涡轮增压器轴向力进行分析，将轴向力结果输入DyRoBeS，计算止推轴承不同油楔面下的油膜厚度，选择承载能力满足要求的止推轴承，并进行压气机性能试验。结果表明：压比的仿真计算与试验结果基本一致，在低速工况下重合性较好，高速工况下最大误差小于1%；效率的仿真计算结果较试验略低，误差范围为0.5%~2.0%，但仿真与试验的总体趋势一致，在小流量范围内误差更小。该方法能够在增压器初步配试阶段较精确地选择止推轴承，提高整机可靠性。

关键词：涡轮增压器；止推轴承；轴向力；油楔面

Abstract:In order to study the evaluation and selection method of turbocharger thrust bearing, the finite element model of a turbocharger is established by using numerical simulation, then the axial force of turbocharger is calculated by NUMECA software. The results are passed into DyRoBeS to calculate the oil film thickness under different oil wedges, the suitable thrust bearing which the load capacity meet the requirements are chosen, and the performance test of turbocharge is carried out.The results show that the pressure ratio calculated with simulation is basically consistent with the tests,the coincidence is better at low speed,and the maximum deviation is within 1% at high speed;the calculated efficiency is a little lower than the test and the deviation range is between 0.5%-2%, but the overall trend of simulation efficiency is consistent with the measured efficiency, and the deviation is less in the small flow range. This method can accurately select the thrust bearing in the preliminary matching test stage and improve the reliability of turbocharger.

Keywords:turbocharger; thrust bearing; axial force; oil wedge