田新伟1,2，赵忠诚1,2，褚国良1,2，江雨晨3，胡勇3，刘营4
1.内燃机可靠性国家重点实验室，山东潍坊261061；2.潍柴动力股份有限公司，山东潍坊261061；3.山东大学能源与动力工程学院，山东济南250061;4.山推工程机械股份有限公司，山东济宁272073
摘要：为研究不同阶次缸套变形对柴油机工作状态下配缸间隙特性的影响，进行应力分析,通过耦合模型仿真得到活塞和缸套的变形;通过傅里叶变换,得到缸套各阶次变形形态，对变形幅值进行缩放，对比分析不同阶次的影响权重及显著性。分析结果表明：缸套变形各阶次幅值波动对摩擦功耗峰值和最大振动加速度幅值有较大影响，对最大油膜压力也有影响，对最小油膜厚度和最小工作配缸间隙的影响极小；缸套变形阶次越高，变形幅值波动度越低；同一特性下，2阶变形的波动度是6阶变形的9倍以上，对工作配缸间隙进行优化设计时应着重考虑缸套2阶变形。
关键词：柴油机；缸套变形；傅里叶变换；配缸间隙
Abstract：In order to study the effect of different order of cylinder liner deformation on the cylinder matching clearance characteristics of diesel engine under working conditions, the stress of the whole diesel engine is analyzed, the deformation of piston and cylinder liner is simulated by coupling model, and the deformation shape of each order is carried out by Fourier transformation.The amplitude of deformation is scaled，the influence weight and significance of the order is compared and analyzed. The analysis results show that: the amplitude fluctuation of each order of cylinder liner deformation has a great influence on the peak value of friction power consumption and the maximum amplitude of vibration acceleration among the five indicators of working cylinder clearance characteristics, and the influence on the maximum oil film pressure is the second, the influence on the minimum oil film thickness and the minimum working cylinder clearance is minimal, the higher the deformation order is, the lower the amplitude fluctuation of deformation is, the fluctuation values of the same index of the secondorder and the sixthorder are all different by more than 9 times.The secondorder deformation of the cylinder liner should be considered in the optimization design of the working cylinder clearance
Keywords:diesel engine; cylinder liner deformation; Fourier transform; cylinder clearance
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