Study on dynamic characteristics of wind power speed-increasing box considering temperature effect

Abstract

Abstract: Aiming at the abnormal temperature phenomenon of wind power speed-increasing gearbox, based on Block flash temperature theory and Hertz contact theory, a calculation method considering the contact temperature of tooth surface under random wind load is proposed. Based on this method, and according to the coupling modeling theory of planetary gear trains, a calculation model for the dynamic performance of the wind power speed-increasing gearbox is established. The model not only reveals the functional relationship between random wind load, tooth surface contact temperature and tooth profile thermal deformation, but also shows the effect of non-linear factors such as random wind load and tooth surface contact temperature on the dynamic response of wind power gearboxes. The results show that the random dynamic change characteristics of the input load of the wind power speed-increasing box will cause the contact temperature of the tooth surface to fluctuate within a certain range. The dynamic tooth surface contact temperature will cause thermal deformation of the gear tooth profile, thereby affecting the time-varying meshing stiffness of the gear, and ultimately affecting the dynamic characteristics of the gearbox. This study may provide a theoretical reference for solving the abnormal temperature phenomenon of wind power speed-increasing gearboxes.

Key words: gear, tooth surface contact temperature, nonlinear dynamics, dynamic response

CLC Number:

TH212

ZHAO Rong-zhen, HUA Zhi-feng. Study on dynamic characteristics of wind power speed-increasing box considering temperature effect[J]. Journal of Lanzhou University of Technology, 2022, 48(2): 34-42.

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