Abstract
Our objective is to develop a long-life rotary machine as synchronous generators and motors. What is necessary for this objective is to design a high-strength bolted joint, which is responsible for fixing a salient pole to a rotor shaft. While operating the machine, centrifugal force and moment are loaded on a bolted joint, because a point of load is eccentric to a center of a bolt. We tried to apply a theory which has been provided in VDI2230-Blattl to a bolted joint under eccentric force, and estimate limit centrifugal force which is the cause of partial separation between the pole and the rotor shaft, and evaluate additional tension of a bolt after the partial separation has occurred. Additionally, to define load introduction factor in that case, we analyzed the bolted joint by FEM. Finally, we could design a high-strength bolted joint verified by a theoretical study and FEM analysis.
