Modal Analysis of Variable Structure of Gate Rotor of CP-type Single-screw Structure

Single screw technology, due to its superiority of structure, has been widely used in many fields of gas compression, refrigeration, power and so on at present. However, specialized research on the dynamics of single screw structure has not been systematic or in-depth yet. As for single screw compressors and expanders, the dynamics of the gate rotor are the key factors influencing its performance, and the variable-structure modal analysis of the gate rotor is an important task to study its dynamic characteristics. In this paper, the modal parameters of the CP-type single-screw structure gate rotor are compared by modal simulation and modal experiment, and the accuracy of the finite element method is verified. And mainly carried out the simulation modal analysis of the gate rotor variable structure. The results show that the change of structural parameters is an important factor affecting the natural frequency of the gate rotor mode. The variable structure modal analysis can be used to provide reference for the structural optimization of the gate rotor.