The main function of flywheel is to store redundant kinetic energy and supplement the defective energy by releasing the stored energy so as to suppress the vibration of system torque or simulation inertial device. The flywheel designed and manufactured by our company is mainly used for laboratory equipment, which has sole rotational inertia and multiple rotational inertial combinations. It has compact shift structure, simple transmission mode and high reliability, which is widely applied in the field of rail test equipment, aviation test equipment, armored vehicle test equipment and other fields.