The influence of rotor designs suitable for industrial production on the performance of screw compressors

摘要

The very limited market presence of screw compressors in mass-produced vehicles can be put down to the complicated geometry and tight tolerances of screw rotors, which rule out economic production in large numbers by modern manufacturing methods. However, a range of innovative fabrication procedures for the manufacture of compressor components, in particular of the rotors, suggests that economic production cannot be far away. The solution is likely to be by means of deformation production procedures, along with suitably modified profile and rotor geometries. The screw compressor we have developed, which can be considered as a well-designed machine for mass production using deformation techniques, but with untypical geometrical parameters, will be compared with a screw compressor which has thermodynamically favourable operating performance. The following evaluation of the screw compressor is based on the volumetric and power efficiency within the framework of a steady state and quasi-steady state analysis of the machine characteristics. The development and construction of a screw compressor using techniques suitable for deformation production techniques results in a machine with comparatively good thermodynamic performance, in spite of the untypical machine geometry parameters.