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Liu, Fei; Chen, Yonghong; Lu, Binbin; Luo, Wenjun; Chen, Bingkui
Mechanism and machine theory, January 2024, 2024-01-00, Letnik: 191Journal Article
•It is the first time to study the vibration characteristics of worm helical gear.•The influence of different errors on vibration characteristics is considered.•An experimental platform is built to test the vibration with different errors.•The experimental results verify the accuracy of theoretical analysis. The application of worm helical gear in smart car, smart home and other fields can significantly reduce the weight of products. Accordingly, the requirements for vibration and noise are also increased. In this paper, the lumped mass method is used to establish the dynamic model of point contact bending-twisting shaft meshing coupling worm helical gear drive. In this model, the contact ellipse is transformed into an equivalent rectangle, and the nonlinear factors such as time-varying meshing stiffness, tooth meshing error and meshing damping are considered. The vibration characteristics of worm helical gear drive in three directions and at meshing point are obtained for the first time. Machining accuracy, tooth surface modification and assembly errors are transformed into the error in the dynamic model respectively, and their effects on the vibration characteristics are analyzed. The closed vibration and noise performance test bench of worm helical gear drive is built, and the influence of three kind of errors on the vibration characteristics of worm helical gear drive are tested to verify the correctness of the dynamic model and its numerical analysis results. Both the theoretical analysis and the experimental results show that machining accuracy, tooth surface modification and the assembly error have a great influence on the vibration characteristics.
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