Fretting instability characteristics for gear shaft shoulder

Abstract

In order to solve fretting instability problem of gear shaft shoulder due to torsional vibration in mechanical system, the mathematical model of fretting instability vibration of gear shaft shoulder was established by adopting the method of combining kinematics and tribology, and the numerical analysis was applied to the fretting instability mechanism of gear shaft shoulder by introducing the friction instability damping ratio. The numerical results show that the main factors causing the unstable and vibrating gear shaft shoulder are the large tightening torque and too large static friction coefficient. The reasonable values of the static friction coefficient, the amount of interference and tightening torque can effectively mitigate the fretting instability phenomenon of gear shaft shoulder. The experimental results verify that damping plays a significant role in eliminating the vibration of gear shaft control system.

Keywords

gear shaft shoulder / torsional vibration / kinematics / fretting / friction instability damping ratio

References

[1] TrumanC E, BookerJ D. Analysis of a shrink-fit failure on a gear hub/shaft assembly [J]. Engineering Failure Analysis, 2007, 14(4): 557-572

[2] ZhangY, McclainB, FangX D. Design of interference fits via finite element method [J]. International Journal of Mechanical Sciences, 2000, 42(4): 1835-1850

[3] EJ-q, LiG-m, ZhangB, DongJ-d, ZhuHao. Fatigue simulation and analysis on planetary gear of megawatt wind power yaw reducer [J]. Journal of Hunan University (Science and Technology), 2011, 38(9): 32-38

[4] PuL-g, JiM-gangDesign of machinery [M], 2006, Beijing, Higher Education Press: 183-190

[5] ZhouZ-rong. On fretting wear and fretting fatigue [J]. China Mechanical Engineering, 2000, 11(10): 1146-1150

[6] ZhengJ-f, LuoJ, PengJ-f, JinX-s, ZhuM-hao. Characteristics of fretting wear of LZ50 steel [J]. Journal of the China Railway Society, 2010, 32(4): 33-37

[7] CaiZ-b, ZhuM-h, ZhangQ, HeL-p, LinX-zhou. Oxidation behaviors of steel-to-steel contact under torsional fretting wear [J]. Journal of Xi’an Jiaotong University, 2009, 43(9): 86-90

[8] CaiZ-b, ZhuM-h, LinX-zhou. Friction and wear of 7075 aluminum alloy induced by torsional fretting [J]. Transactions of Nonferrous Metals Society of China, 2010, 20(3): 371-376

[9] RobertE. Another perspective: False brinelling and fretting corrosion [J]. Tribology & Lubrication Technology, 2004, 60(12): 34-37

[10] ZhangX H, LiuD X. Effect of shot peening on fretting fatigue of Ti811 alloy at elevated temperature [J]. International Journal of Fatigue, 2009, 31(5): 889-893

[11] MajzoobiG H, NematiJ, NovinroozA J, FarrahiG H. Modification of fretting fatigue behavior of Al7075-T6 alloy by the application of titanium coating using IBED technique and shot peening [J]. Tribology International, 2009, 42(1): 121-129

[12] RatsimbaC H H, MccollI R, WilliamsE J, LeenS B, SohH P. Measurement, analysis and prediction of fretting wear damage in a representative aeroengine spline coupling [J]. Wear, 2004, 257: 1193-1206

[13] YuJ, CaiZ B, ZhuM H, QuS-x, ZhouZ-rong. Study on torsional fretting behavior of UHMWPE [J]. Applied Surface Science, 2008, 225(2): 616-618

[14] LiuQ, ErL-j, LiuJ-kun. Overview of characteristics, modeling and compensation of nonlinear friction in servo systems [J]. Systems Engineering and Electronics, 2002, 24(11): 45-52

[15] BarbosaR S, MachadoT J A, JesusI S. Effect of fractional orders in the velocity control of a servo system [J]. Computers & Mathematics with Applications, 2010, 59(5): 1679-1686