Assembly Quality Control and Dynamic Design of High-Speed Rotor System with Curvic Couplings

Aiming at solving the engineering problems in the use of rotor system with curvic couplings, including large dispersion of initial unbalance and high-level vibration response at operation state, the mechanical model for the curvic coupling assembly is established to describe the nonlinear relationship between the interface contact state and component nonaxiality, and incorporated into the rotor dynamic model to obtain the numerical solution for the vibration response. Furthermore, the multi-parameter optimization method for assembly quality control and rotor dynamic design is developed, targeting the reduction of initial unbalance and displacement amplitude at working speeds. Case studies exhibit that assembly quality and dynamic characteristics of the high-speed rotor system are both significantly improved through reasonable design of the assembly phase angle and the axial preload, which verifies the effectiveness of the optimal method proposed in this paper.