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Abstract
The influence of the dynamic wear model considering the tooth contact flash temperature on the dynamic characteristics of a gear-bearing system is studied. Firstly, the meshing stiffness model, based on flash temperature theory, is established. Then, the changing of tooth surface temperature and meshing stiffness in the process of gear meshing is analyzed. Next, the initial tooth surface wear is calculated based on the Archard theory, and the dynamic wear model of the system is established. Finally, the effects of initial wear, friction factors, and damping ratio on the system response are studied. The results show that with the increase of fractal dimension D, the uncertainty and the fluctuation amplitude of backlash decrease, and the meshing force decreases. Therefore, the initial tooth surface wear is reduced, and the stability of the system response with a dynamic wear model is improved; with the increase of the friction coefficient, the tooth surface flash temperature rises, and the root mean square value of the vibration displacement of the system amplifies, which indicates that the system tends to be unstable; with the increase of damping ratio, the system changes from unstable quasi-periodic and chaotic motion to the stable periodic motion. The increase of damping accelerates the energy loss of the system and makes the system prone to be stable.
Highlights
With the development of science and technology, clean energy has become an integral part of society
Wind energy is a kind of renewable clean energy, and wind power generation is an important part of non-fossil energy power generation
The gear transmission system, which is in the gearbox of the wind power generation, has an important impact on the stability of the system, and many scholars have carried out modeling analysis on it [1,2]
Summary
With the development of science and technology, clean energy has become an integral part of society. Based on the flash temperature theory and the Hertz contact theory, Gou et al [11] calculated the time-varying meshing stiffness considering the tooth surface contact temperature and analyzed the dynamic characteristics of the gear system under corresponding working conditions. Pan et al [14] established a time-varying meshing stiffness model including the influence of tooth contact temperature, friction coefficient, and normal load It was substituted into the nonlinear dynamic model of a gear-bearing system with 10 degrees of freedom. TIno cthalicsuplaatpeepr,atrhaembeateckrsla(sinhitcioanl stoidoethrinsugrtfhaeceinwiteiaalr,tdoyonthamsuircftaocoetwh esuarrf(aSceectwioenar4, .a1n) dis tcoaolcthulsauterfda,caentdemitpisersautbusrteit)u, tthede ginetaor-tbheeagreinagr-bsyesatreinmgsscyosntesmide(SriynsgtedmiffIeI)r.eWntebaarcekulassihnganthde mpaersahminegtesrtsifμfn=es0s.3a,rkei =de1fi, ζnhed= .0T.0h1e, nζ, t=hζe2g=eζapr-=bζegar=in0.g01sy, espte=megc=o0n.s0i1d,eeri=n0g.1b,aFcmkl=as0h.10w5i,thFa fractal characteristics is called System I, through which the meshing force is calculated; the gear-bearing system considering backlash with initial tooth surface wear is called System II, through which the system response under a wear condition is analyzed; and the gear-bearing system considering the dynamic wear model is called System III.
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