Dynamic characteristics of gear system under different micro-topographies with the same roughness on tooth surface
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Dynamic characteristics of gear system under different micro-topographies with the same roughness on tooth surface YIN Lei(殷雷)1, DENG Chun-long(邓春龙)1, YU Wen-nian(余文念)2, SHAO Yi-min(邵毅敏)1, WANG Li-ming(王利明) 1 1. State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China; 2. College of Mechanical Engineering, Chongqing University, Chongqing 400044, China © Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract: The topography of gear meshing interfaces is one of the key factors affecting the dynamic characteristics of the gear transmission system. In order to obtain the contact characteristics of meshing gear pair with different surface micro-topographies, an interface feature model and a tribo-dynamics coupling model for the gear system are proposed in this paper. The effects of the gear tooth surface micro-topography on the oil film distribution, contact damping and friction are considered. The time-varying meshing stiffness and the static transmission error are included in the abovementioned models. An exemplary gear pair is analyzed using the proposed models to investigate the influence of the surface micro-topography on the dynamic characteristics of gear system under different micro-topographies and input torque conditions. Simulation results show that the effects of gear tooth micro-topography on the gear dynamic responses (including the friction and the vicious damping at the gear meshing interface and the vibration in the direction of offline of action) are highly dependent on the regularity of tooth surface. The vibration and noise can be significantly controlled by manufacturing a regular gear tooth profiles instead of random profiles. Key words: gear tribo-dynamics; coupling model; topography; roughness Cite this article as: YIN Lei, DENG Chun-long, YU Wen-nian, SHAO Yi-min, WANG Li-ming. Dynamic characteristics of gear system under different micro-topographies with the same roughness on tooth surface [J]. Journal of Central South University, 2020, 27(8): 2311−2323. DOI: https://doi.org/10.1007/s11771-020-4451-6.
1 Introduction Gear system is widely used in many industry fields, such as automobile, ship, aerospace. With the increasing demand for high-speed, heavy-duty gearboxes, the dynamic responses of gear system have been paid more and more attentions in the gear design stage. The contact characteristics at the gear meshing interfaces are one of the main factors affecting the dynamic responses of gear transmission system. Moreover, the surface microtopography is an important characterization of the gear meshing interfaces. Different surface microFoundation
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topographies may result in distinct vibration responses of the gear system. In the literatures, there are a lot of papers dealing with the dynamic characteristics of the gear system. The stiffness excitation imposes a timevarying coefficient on the dynamic equation of the gear system, which actually constitutes the most important attribute of the gear dynamics
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