Twin Screw Compressor Performance and Its Relationship with Rotor Cutter Blade Shape and Manufacturing Cost

By making use of a suite of programs for designing profile geometry, cutter geometry and predicting the thermodynamic performance of a twin screw compressor, this paper investigates techniques of obtaining an optimised rotor cutter blade design. The techniques for using different geometric schemes for setting clearances are explained, and the techniques for optimising main manufacturing parameters for obtaining the optimised blade shapes are presented. The main purpose of using different geometric schemes for setting clearances is to improve the compressor performance, and the main purpose for obtaining the optimised blade shapes is to reduce the manufacturing cost of the compressor.