马辉，张创科，孙俊花，于巍
瑞立美联制动技术（廊坊）有限公司，河北廊坊065000
摘要：建立空气压缩机装配的三维有限元模型，根据温度场的热边界计算公式和试验数据，对空气压缩机的热边界条件参数进行修正，得到空气压缩机稳态工况下温度场的分布情况。采用多物理场耦合方法，计算气缸体在螺栓预紧力、温度和气体压力等工况下的变形情况。结果表明，缸盖螺栓预紧力和气体力对气缸体变形影响最大，在工作条件下，热负荷对气缸体变形影响较小。对气缸体结构进行改进，在45°、135°、225°和315°处各增加一条加强筋，使空气压缩机气缸体的变形平均减小了约45%。
关键词：空气压缩机；气缸体；热变形
Abstract:The finite element model of air compressor assembly is established. According to the test data of the temperature field, the thermal boundary parameters of the air compressor are corrected to obtain the distribution of the temperature field under steady state in the working process. The multi-field coupling method is used to calculate the deformation of the cylinder under the condition of bolt pretension, temperature and pressure. The results indicate that cylinder head bolt pretension and gas pressure has the greatest influence on the deformation of the cylinder. The cylinder block structure is improved by adding a reinforcingrib at 45°，135°，225°and 315°respectively, and the deformation of cylinder block is reduced by about 45%. The results show that the improvement is effective.
Keywords:air compressor; cylinder block; thermal deformation
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