1.College of Mechanical Engineering, Taiyuan University of Technology Taiyuan, 030024, China;
2.Shanxi Key Laboratory of Fully Mechanized Coal Mining Equipment Taiyuan, 030024, China
Abstract:Aiming at the problem that the vibration signals of planetary gear boes are susceptible to noise interference, signal components complication and sun wheel troubles, a fault diagnosis method for the planetary gearbox sun gears based on the Neighborhood Coefficient (NeighCoeff) and Hilbert envelope was proposed.A vibration signal simulation model for sun gear local faults under noise disturbance was established.The NeighCoeff was used to denoise the noisy signal, and the signal was reconstructed by the Hilbert envelope.The simulation results provide a clearer spectrum, which proves that the method can effectively extract the fault characteristic frequency affected by noise.The method was applied to the fault diagnosis experiments of a practical planetary gearbox sun gear.The vibration signals of the sun gear processed by the method can classify clearly the three common working states: normal, broken teeth and wear and the faults of the sun gear can be accurately identified.The results show that the method can effectively improve the accuracy of fault diagnosis of sun gears.
程宝安 1,2, 庞新宇 1,2, 杨兆建 1,2,邵杰 1,2. 基于NeighCoeff和Hilbert包络分析的行星齿轮箱太阳轮故障诊断[J]. 振动与冲击, 2018, 37(22): 151-157.
CHENG Baoan1,2,PANG Xinyu1,2,YANG Zhaojian1,2,SHAO Jie1,2 . Fault diagnosis of the sun wheel of planetary gearboes based on the NeighCoeff and Hilbert envelope analysis. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(22): 151-157.
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