Abstract:  In order to solve the problem that the structural parameters and rotation speed affected the noise and bearing service life,the dynamic and static characteristics of scroll compressor transmission system were studied. The finite element analysis model of variable frequency scroll compressor transmission system was established. The shape parameter and the layout position of balance iron, the spindle speed, the stiffness of primary and secondary bearings were selected as the design variables. The maximum static deformation, which reflected the static characteristic of the transmission system, the vibration frequency of the dynamic characteristic, the vibration amplitude of the typical position point and the bearing force, were selected as the research goals. The method of super Latin square test analysis was used. The results show that the stiffness of bearing 1 has a great influence on the static characteristics and the first-order frequency response of the transmission system, the relative position of the bearing and the structural parameters of the balance block have little influence on the natural frequency of the transmission system, and the structural parameters of the balance block x11、x9、x10、x4 have a great influence on the dynamic balance force response. The research results provide a theoretical basis for the optimization of transmission system of variable frequency scroll compressor.

Key words:  scroll compressor; transmission system; static characteristics; dynamic characteristics