Application of FEA in failure diagnosis about vacuum pump

WANG Yueling, LIU Xiaohui, NING Dongxing, ZHANG Shuang
(Zhongtong Automobile Industry Group Co., Ltd., Liaocheng 252000, China)

Abstract: Aiming at abnormal vibration of vacuum pump in trialmanufacture of new products, firstly, the reason for manufacture and assemblage was excluded, then the reason was analyzed from the mechanical design. The 2D engineering drawings about vacuum pump frame was changed into the solid model, and finite element model analysis for vacuum pump frame was carried out in ANSYS Workbench, and natureal frequency of it was found within the range of rotation frequency about vacuum pump, so resonance was existed. The design plan was amended and finite element mode analysis for vacuum pump frame was carried out, natural frequency of vacuum pump frame was avoided by rotation frequency of vacuum pump. After trialmanufacture according to amend plan, abnormal vibration of vacuum pump was solved. The results indicate that FEM can play as an important role in failure diagnosis, and it is an approach to failure diagnosis. FEM is a numerical method to analyze solid model, and it has higher accuracy.
Key words: vacuum pump; modal analysis; finite element method(FEM); resonance