Influence of a ring gear with crack propagation on load sharing behaviors of compound planetary gear set
LI Guoyan1,2, SHEN Qi1, NIU Linkai1, MA Liang1, DONG Dehao3
1.Key Laboratory of Advance Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China;
2.School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China;
3.Shanghai Aerospace Equipments Manufacturer, Shanghai 201100, China
Abstract：The load sharing analysis of planetary transmissions has significant influence on the operation and reliability of a gear system.In order to reveal the impact of crack propagation on the load sharing behaviors, this paper established a nonlinear dynamic model of compound planetary gear set with crack.This model considers the variable meshing stiffness, variable bearing stiffness, mesh phases, damping, and crack.At first, a mathematical meshing stiffness model of cracked ring gear was established.The meshing stiffness with respect to different crack levels was calculated, so the crack defect was involved to the developed dynamic model as an internal excitation.Next, the nonlinear contact force-deformation relationship between the rolling elements and raceway was derived, so the variable bearing stiffness can also be incorporated into this dynamic model.Further, the fault signals along the line of action of each mesh pair with respect to different crack levels were simulated.The time waves, FFT spectrum, phase diagram and poincaré section were used to analyze the impact of crack propagation on the dynamic characteristics of the gear system.At last, the load sharing ratio was calculated, and the uneven load sharing behaviors with crack propagation were also studied.
李国彦1,2，沈奇1，牛蔺楷1，马亮1，董德浩3. 内齿圈裂纹扩展对复合两级行星轮系均载特性的影响研究[J]. 振动与冲击, 2021, 40(12): 275-282.
LI Guoyan1,2, SHEN Qi1, NIU Linkai1, MA Liang1, DONG Dehao3. Influence of a ring gear with crack propagation on load sharing behaviors of compound planetary gear set. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(12): 275-282.
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