针对150型柴油机热负荷问题,以实测温度场数据为基础,确定了气缸套的换热边界条件,建立了完整的气缸套温度场计算模型。运用有限元法分析了150型柴油机标定工况下气缸套三维温度场及热变形。分析结果表明:最高温度为209℃,位于气缸套内壁上端;最大径向变形量为0.244 mm,位于气缸套上端。 According to the thermal load of 150 diesel engine, based on the measured temperature field data, the heat transfer boundary conditions of the cylinder liner were determined and a complete temperature calculation model was established. The finite element method was used to analyze the three-dimensional temperature field and thermal deformation of cylinder liner under the condition of 150 diesel engine calibration. The analysis results show that the maximum temperature is 209 ℃, located at the upper end of the cylinder liner wall; the maximum radial deformation is 0.244 mm, which is located at the upper end of the cylinder liner.