Modification for scroll wrap height of a scroll compressor

Abstract

In order to obtain better axial hermetic seal of scroll compression chambers and hence a better performance for a scroll compressor, two modification methods for scroll wrap height are proposed based on the axial deformation of the scroll wrap. First, the design modification, which allows the scroll wrap height and its dimensional tolerances to be designed based on the axial deformation of scroll wrap in the basic shaft system, is suitable for mass production of scroll compressors. Second, the special modification, which allows the scroll wrap height to be modified based on the axial deformation of scroll wrap after its manufacturing, can be used for single-piece production of scroll compressor or for the scroll compressors available. A special modification was conducted for a scroll compressor, in which the orbiting scroll wrap was modified based on the simulation results of its axial deformation. According to the tests conducted later, the performance of the scroll compressor with modified scroll wrap can significantly be improved without deteriorating its original manufacturing precision.