Affiliations: [a] School of Mechanical Engineering, Shenyang University of Technology, Shenyang, China | [b] Department of Mechanical Engineering, Nippon Institute of Technology, Saitama, Japan
Correspondence:
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Corresponding author: Feng Sun, School of Mechanical Engineering, Shenyang University of Technology, No. 111, Shenliao West Road, Economic & Technological Development Zone, Shenyang, 110870, China. E-mail: sunfeng@sut.edu.cn
Abstract: In order to solve the problems of wear, lubrication and complex structure of digital oil-free scroll compressor, an oil-free scroll compressor driven by magnetic force is proposed in this paper. The new scroll compressor is driven by electromagnetic force, without anti-rotation mechanism and motor, which reduces mechanical contact, so as to achieve the goal of low wear and oil-free. Back pressure device provides variable axial magnetic force to reduce the vibration of the compressor and ensure that the compressor works under the optimum force. The mathematical model of back pressure device and driving force is established and verified by finite element method. The results are in good agreement. The closed-loop step response of the new compressor is simulated. The gas force is decomposed and analyzed. The analysis, calculation and simulation results show that the back pressure device and the driving device meet the requirements of the compressor.
Keywords: Digital scroll compressor, decomposition of compressor gas force, magnetic drive, hybrid magnetic force, finite-element method
