A standard feature of AutoCAD software enables a rotor to be 'cut' from a given blank and then generate a meshing rotor profile from a given primary profile template for practically all existing screw compressor rotor profiles. Three examples are presented, namely, a roots blower to demonstrate two-dimensional meshing, a twin screw compressor to demonstrate 'two and one half dimensional generation and a single screw compressor rotor and hobbing tool to show full three-dimensional profile generation. Rotor profile points can be generated by this procedure from which the compressor displacement, the sealing line points and the blow-hole area can be estimated. Furthermore, the derived results can be integrated into a software suite for use as a design tool to predict compressor performance and related operating characteristics.
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