Structural and torsional vibration analysis of a dry screw compressor

9th International Conference on Compressors and their Systems

Willie, J.^1 ; Sachs, R.^1

Gardner Denver Schopfheim GmbH, Roggenbachstr. 58, Schopfheim, Germany^1

关键词: Angular deflection;    Clearance distributions;    Dry screw compressor;    Noise measurements;    Torsional frequency;    Torsional response;    Torsional vibration;    Torsional vibration analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/90/1/012005/pdf
DOI  :  10.1088/1757-899X/90/1/012005

来源: IOP

【 摘 要 】

This paper investigates torsional vibration and pulsating noise in a dry screw compressor. The compressor is designed at Gardner Denver (GD) and is oil free and use for mounting on highway trucks. They are driven using a Power Take-Off (PTO) transmission and gear box on a truck. Torque peak fluctuation and noise measurements are done and their sources are investigated and reported in this work. To accurately predict the torsional response (frequency and relative angular deflection and torque amplitude), the Holzer method is used. It is shown that the first torsional frequency is manifested as sidebands in the gear train meshing frequencies and this can lead to noise that is the result of amplitude modulation. Sensitivity analysis of the drive train identifies the weakest link in the drive train that limits the first torsional frequency to a low value. Finally, the significance of higher mode shapes on inter-lobe clearance distribution of the rotors is investigated.