Energy dissipation mechanism and experiment of particle dampers for gear transmission under centrifugal loads |
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| Institution: | 1. Department of Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005, China;2. Beijing Institute of Electronic System Engineering, Beijing 100854, China;3. Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China;1. Hubei Agricultural Machinery Engineering Research and Design Institute, Hubei University of Technology, Wuhan, Hubei 430068, China;2. School of Mechanical Engineering and State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China;1. ISRO Satellite Centre, Vimanapura, Bangalore 560017, India;2. Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, India;1. Wuhan University of Science and Technology, Wuhan 430081, China;2. University of Houston, Houston, TX 77204, USA |
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| Abstract: | As a passive means of vibration reduction, particle damping is mainly applied to the horizontal or vertical steady field. However, it is seldom applied to centrifugal fields. Under high speed and heavy loading, the vibration of tooth surfaces of gear transmissions becomes more severe shortening gear service life and augmenting noise. Under centrifugal loading, the particle system exhibits different characteristics, for example, particles are extruded at the end farthest from the center. We investigated gears with drilled via holes filled with damping particles. Using the discrete-element method, we developed an energy dissipation model for the particle system accounting for friction and inelastic collisions. Energy dissipation and damping characteristics of this system were analyzed. Experiments were also conducted with the gear system having different particle filling rates. The results show that this filling rate is an important parameter associated with particle damping in a centrifugal field. An unsuitable filling rate would significantly reduce damping effectiveness. With changes in rotation speed and load, the gear transmission system has different optimal filling rates. The results provide guidelines for the application of particle damping in centrifugal fields of gear transmissions. |
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| Keywords: | Centrifugal field Gear transmission Particle damping Discrete element method Vibration reduction |
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