Abstract: Scroll compressors have broad prospects for development in the field of miniaturization,reducing the size of scroll plate is an important optimization goal of miniature scroll compressor,and selecting a scroll profile with a compact structure is crucial. Using a variable base circle radius involute,instead of the traditional fixed base circle radius involute,can reduce the diameter and tooth height of the scroll plate,resulting in a reduction in the radial and axial dimensions of the scroll plate.In order to study the influence of the size reduction in two directions on the mechanical properties of the scroll plate,fluid-heat-solid multi-field coupling analysis on fixed base circle radius involute scroll plate and variable base circle radius involute scroll plates with reduced diameter and tooth height was performed using ANSYS software. The mechanical properties of three scroll plate were compared using stress and deformation as indicators. The research results indicate that reducing the tooth height by using variable base circle radius involutes can significantly improve the mechanical performance of the scroll plate. Using variable base circle radius involute to reduce the diameter can better meet the needs of lightweight and miniaturization,but the mechanical performance will decrease.

Key words: scroll compressor, variable base circle radius involute, miniaturization, finite element analysis, multi-field coupling analysis