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Influences of friction and mesh misalignment on time-varying mesh stiffness of helical gears

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Abstract

As one of the most important excitation sources of vibration, time-varying mesh stiffness of helical gear pairs need accurately calculated. Compared with spur gears, friction in helical gears is significant. This work for the first time presents an improved calculation method for the mesh stiffness of helical gears with effect of friction incorporated. Firstly, helical gear is sliced into number of pieces along its axis direction and each piece could be regarded as spur gear. Then forces applied to each piece including friction force are analyzed. Potential energy method is employed to develop time-varying mesh stiffness of each piece pair of both kinds of helical gears with different transverse and axial contact ratios. Furthermore, influences of various working conditions and misalignment on mesh stiffness are also investigated. Results indicate that effect brought by friction on total mesh stiffness should be not neglected. The reduction amount of stiffness increases with lower speed, heavier load and rougher surface. The stiffness difference between cases with and without friction is affected by gear geometry and mounting parameters like module, helix angle and mounting misalignment. This work provides an essential tool for comprehensive dynamics analysis with consideration of the relationship between stiffness and working conditions.

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Authors and Affiliations

  1. The State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing, 400030, China

    Lin Han

  2. Tianjin Key Laboratory of High Speed Cutting & Precision Machining, Tianjin University of Technology and Education, Tianjin, 300222, China

    Lin Han, Lixin Xu & Houjun Qi

Authors
  1. Lin Han
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  2. Lixin Xu
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  3. Houjun Qi
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Corresponding author

Correspondence to Lin Han.

Additional information

Recommended by Associate Editor Eung-Soo Shin

Lin Han is a Lecturer of School of Mechanical Engineering, Tianjin University of Technology and Education, Tianjin, China. He received his doctor degree in mechanical engineering from Tianjin University in 2014. His research interests include gear transmission dynamics, fault diagnosis of rotating machineries.

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Han, L., Xu, L. & Qi, H. Influences of friction and mesh misalignment on time-varying mesh stiffness of helical gears. J Mech Sci Technol 31, 3121–3130 (2017). https://doi.org/10.1007/s12206-017-0602-6

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  • DOI: https://doi.org/10.1007/s12206-017-0602-6

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