A method for the geometrical analysis of twin-shaft rotary displacement machines

摘要

The thermodynamic simulation of screw machines on the basis of a chamber model requires, dependent on the complexity of the physical models, adapting the geometry of displacement machines with reference to rotation angle values such as the working chamber volumes [1]. A general calculation of the geometrical values required is possible if the machine geometry is also being subjected to a valid analysis, and essential elements specifically required for a chamber model have been identified and logically interconnected. In order to make this complex process fully automatic, a method for analysing displacement machines on the basis of an abstract surface representation has been developed and implemented. The logical identification of the working chambers and gap connections is used as the basis for the geometrical calculations. Employing this method in the program language C++, according to the paradigms of object-orientated programming, guarantees good serviceability and high potential for further development.