Comprehensive 3D-elastohydrodynamic simulation of hermetic compressor crank drive

10th International Conference on Compressors and their Systems

Posch, S.^1 ; Hopfgartner, J.^1 ; Berger, E.^1 ; Zuber, B.^1 ; Almbauer, R.^1 ; Schöllauf, P.^2

Graz University of Technology, Graz

8010, Austria^1

Secop Austria GmbH, Fürstenfeld

8280, Austria^2

关键词: Commercial software;    Comprehensive analysis;    Development process;    Hermetic compressors;    Model development;    Piston secondary motion;    Thermal compressors;    Thermodynamic loss;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/232/1/012008/pdf
DOI  :  10.1088/1757-899X/232/1/012008

来源: IOP

【 摘 要 】

Mechanical, electrical and thermodynamic losses form the major loss mechanisms of hermetic compressors for refrigeration application. The present work deals with the investigation of the mechanical losses of a hermetic compressor crank drive. Focus is on 3d-elastohydrodynamic (EHD) modelling of the journal bearings, piston-liner contact and piston secondary motion in combination with multi-body and structural dynamics of the crank drive elements. A detailed description of the model development within the commercial software AVL EXCITE Power Unit is given in the work. The model is used to create a comprehensive analysis of the mechanical losses of a hermetic compressor. Further on, a parametric study concerning oil viscosity and compressor speed is carried out which shows the possibilities of the usage of the model in the development process of hermetic compressors for refrigeration application. Additionally, the usage of the results in an overall thermal network for the determination of the thermal compressor behaviour is discussed.