INFLUENCE OF MESHING ERRORS ON MESHING STIFFNESS OF SPUR GEAR PAIR IN WIND TURBINE GEARBOX CONSIDERING TIME-VARYING FRICTION

Wang Licheng; Liu Yu; Ai Yanting

doi:10.19912/j.0254-0096.tynxb.2024-0670

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (8) : 130-140. DOI: 10.19912/j.0254-0096.tynxb.2024-0670

INFLUENCE OF MESHING ERRORS ON MESHING STIFFNESS OF SPUR GEAR PAIR IN WIND TURBINE GEARBOX CONSIDERING TIME-VARYING FRICTION

Wang Licheng, Liu Yu, Ai Yanting

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Abstract

Taking spur gear pair of wind turbine gearbox as the study object, this study modifies the radial and tangential forces at the meshing point when considering center distance error and shaft misalignment error. A mesh stiffness analysis model is built by the slice potential energy method, which fully considers the characteristics of the real tooth profile and the coupling effect of the fillet foundation stiffness. Additionally, torsional stiffness is introduced to calculate the additional stiffness resulting from shaft misalignment. The model of gear meshing Angle and meshing point pressure Angle including meshing error is derived. The time-varying friction coefficient on the tooth surface varies with the pressure angle, necessitating the revision of the fillet foundation coupling stiffness and torsional stiffness models to account for time-varying friction. The study investigates the influence of center distance error, shaft misalignment error, and time-varying friction on mesh stiffness. The results reveal that after the introduction of a time-varying friction coefficient, the friction force increases the meshing stiffness during the meshing in stage and decreases it during the meshing out stage. Compared to the abrupt change in mesh stiffness at the node under constant friction, the mesh stiffness under time-varying friction exhibits smoother behavior. Positive center distance error reduces mesh stiffness by decreasing the meshing angle. Shaft misalignment leads to a significant reduction in mesh stiffness and changes in meshing time of single and double-tooth. When both errors coexist, positive and negative center distance error can either amplify or mitigate the impact of shaft misalignment error on mesh stiffness.

Key words

wind turbines / time-varying mesh stiffness / center distance error / misalignment / time-varying friction coefficient

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Wang Licheng, Liu Yu, Ai Yanting. INFLUENCE OF MESHING ERRORS ON MESHING STIFFNESS OF SPUR GEAR PAIR IN WIND TURBINE GEARBOX CONSIDERING TIME-VARYING FRICTION[J]. Acta Energiae Solaris Sinica. 2025, 46(8): 130-140 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0670

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