Improving the efficiency of the vml60 compressor using a chain variator and hydraulic system

Abstract

The paper deals with the modernization of the AERZEN VML60 screw compressor, in which the synchronizing gears were replaced by a chain variator with hydraulic pulley pitch control. This solution significantly improved propeller speed control, increased control accuracy, reduced noise and vibration, and extended the operating range of the compressor. The upgrade reduced vibration by 20%, noise by 15%, and improved overall compressor efficiency by 15%. A thermal and gas dynamic calculation of the compressor was also performed, confirming the stable operation of the system under various operating conditions. The main advantages of the proposed solution over a variable speed drive include reduced installation and maintenance complexity, and more flexible and reliable compressor speed control.