Comprehensive Analysis of Geometric Performance of Circular Involute Variable Thickness Scroll Compressor

doi:10.3901/JME.2020.23.118

Abstract

Abstract: A new type of variable thickness scroll compressor line composed of circular involutes with different base circle radii is proposed, which is composed of a circular involute I+ circular involute II+ circular involute I. The method of generating the profile is discussed, the general equations of the profile are given, and a series of geometric models of the circular involute variable thickness scroll compressor are established. Aiming at the established geometric model, the influence of the control coefficients θ, φ^* and R_or on the geometric performance of the variable thickness scroll compressor is analyzed. Based on the circular involute Ⅰ, a geometric model of variable thickness scroll compressors with circular involute Ⅰ + higher-order curve + circular involute Ⅰ is constructed, and the geometric performance of two types of variable thickness scroll compressors is comprehensively analyzed. The results show that:θ taking the median value θ_M,φ^* taking the value of φ_end-2(n₁+1)∏, and R_or taking the larger, the corresponding geometric performance is better. Higher-order curve variable thickness scroll compressors are similar to the circular involute variable thickness scroll compressors corresponding to the median value θ_M, and can be substituted for each other.A new type of variable thickness scroll compressor line composed of circular involutes with different base circle radii is proposed, which is composed of a circular involute I+ circular involute II+ circular involute I. The method of generating the profile is discussed, the general equations of the profile are given, and a series of geometric models of the circular involute variable thickness scroll compressor are established. Aiming at the established geometric model, the influence of the control coefficients θ, φ^* and R_or on the geometric performance of the variable thickness scroll compressor is analyzed. Based on the circular involute Ⅰ, a geometric model of variable thickness scroll compressors with circular involute Ⅰ + higher-order curve + circular involute Ⅰ is constructed, and the geometric performance of two types of variable thickness scroll compressors is comprehensively analyzed. The results show that:θ taking the median value θ_M,φ^* taking the value of φ_end-2(n₁+1)π, and R_or taking the larger, the corresponding geometric performance is better. Higher-order curve variable thickness scroll compressors are similar to the circular involute variable thickness scroll compressors corresponding to the median value θ_M, and can be substituted for each other.

Key words: circular involute, scroll compressor, variable thickness, geometric model, control coefficient

CLC Number:

TH45

ZHANG Pengcheng, PENG Bin, ZHANG Yubo. Comprehensive Analysis of Geometric Performance of Circular Involute Variable Thickness Scroll Compressor[J]. Journal of Mechanical Engineering, 2020, 56(23): 118-128.

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