Although the coupling of diesel generator sets accounts for a small share of the unit cost, its structure is one of the important factors affecting the operating performance of diesel generator sets. Therefore, the design of the coupling has always been one of the hot issues in the diesel generator industry.
Due to processing errors and other reasons, there is always a misalignment error between the centerline of the crankshaft rotation of the diesel engine and the axis of rotation of the motor shaft. This error includes the parallel displacement error and the angular displacement error of the two-axis shaft centerline. Under the premise that the dynamic balance of the diesel engine and the rotor of the motor meets the standard and the rigidity design of the fuselage and other parts meets the standard, this error is one of the main reasons that cause the unit to run, especially the vibration and fatigue damage of the motor.
Therefore the design of the coupling. On the premise of ensuring the transmission of torque, it is actually to minimize the installation error of the generator and the diesel engine and to compensate for the misalignment of the centerline of the rotation of the generator and the diesel engine when the unit is running.