SET Proceedings 2978-4387 Caravel Press 10.65582/set.2014.035 2014.035 Static and Modal Analysis of a Main Rotor in Single Screw Compressors ZhiRuiping WuYuting wuyuting@bjut.edu.cn WangWei WangJingfu MaChongfang Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education & Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality,Beijing University of Technology, NO.100Pingleyuan, Chaoyang District, Beijing, China 25082014 13 978-1-995850-01-6 1 10 25 August 2014 © 2014 Copyright WSSET 2014

The CP-type single screw compressors start to be widely used in refrigeration and heat pump system due to its higher load capacities and more flexible control system compared with a twin screw compressor. The strength and stiffness design are the foundation to promote the operational reliability of single screw compressor. The aim of this study was to estimate the main rotor’s performance by dealing with structural and modal analysis of a main rotor made of two different materials (HT200 and QT400). In this paper we firstly obtain three-dimensional main rotor by Pro/Engineer and then imported it into ANSYS software. Based on the structural analysis, the maximal stress and deformation of the groove wall are obtained with changes of the outlet pressure, and the static analysis indicates that the deformation of the groove wall is a major factor we need to consider when design single screw compressors. By modal analysis, the frequency and deformation of the main rotor are presented, and the modal analysis demonstrates that the main rotor can work at the designed frequency and the resonance phenomenon does not happen. The results acquired here may have practical applications in the design of CP-type single screw compressors.

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