Structural dynamic analysis of the orbiting scroll wrap in the scroll compressor

Abstract

A deep analysis of orbiting scroll wraps was conducted in this paper by using ANSYS and SolidWorks. Through the modal analysis, the involute of the circle profile orbiting scroll wrap demonstrated a large span in natural frequencies, which led to more superiority in avoiding structural resonances. Based on the dynamic harmonic analysis, loads of frequency changes were gained and the stress and strain distribution of the orbiting scroll wrap in the most dangerous working conditions were obtained, which determined the segments with maximum stress and strain-displacement properties. Two paths defined to elucidate further the structural characteristics of the exhaust chamber provided evidence for the initial correction of orbiting wraps. The results of the present study offer a theoretical basis for the design and manufacture of scroll wraps, and providing a new way to evaluate different scroll wraps.

Key words： scroll compressor; orbiting scroll wrap; model analysis; harmonic analysis

Acknowledgements

This paper is supported by the National Natural Science Foundation of China (Grant No. 51276201) and the Hunan Yunjian Co., Ltd.

Notations
\mathit{\phi }	Angle of the involute/(º)
\mathrm{\pi }	Circularity ratio
p\left(\theta \right)	Exhaust pressure/Pa
p_s	Suction pressure/Pa
V_{\mathrm{s}}	Volume of suction chamber/mm3
V\left(\theta \right)	Volume of working chamber/mm3
h	Tooth depth/mm
R_b	Radius of basic circle/mm
{\phi }_e	Final exhibition angle of the involute/(º)
\alpha	Occurrence angle of the involute/(º)
\theta	Spindle rotation angle/(º)
k	Gas isentropic exponent
p_s	Suction pressure/MPa

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