关键词: 液力缓速器转子；空心轴；端面制动力矩；传递方案；计算机辅助工程（CAE）

Abstract: In order to solve the connection problem when the retarder rotor and hollow shaft cannot be integrally cast, the feasibility of different endface braking torque transmission schemes for the hydraulic retarder rotor and hollow shaft is discussed in this paper. The Abaqus software is used for structural optimization. According to the simulation optimal results, the parts are trialmanufactured, and the retarder fatigue test is carried out to verify. The analysis shows that there is a braking torque transmission between the hydraulic retarder rotor and the hollow shaft, which is not just a mechanical component connection problem. In the case of limited assembly space, the scheme of endface gear, cylindrical pins and bolts can be used as an endface braking torque transmission scheme to ensure reliable connection. Increasing the number of endface gear, increasing the gear root and gear top chamfering can significantly improve the ability of the mating structure to transmit the braking torque, reduce the stress on the parts, and improve the service life of the parts.

Key words: Hydraulic retarder rotor; Hollow shaft; Endface braking torque; Transmission scheme; Computer aided engineering (CAE)