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采用自制静电传感器进行润滑条件下轴承钢点接触滑动摩擦胶合故障在线监测试验研究.首先分析了磨损过程静电产生机理和静电感应原理,在此基础上设计研制了磨损区域静电传感器并进行轴承钢胶合故障试验,研究了磨损区域静电信号去噪方法,分析了载荷和转速对摩擦系数和静电信号的影响.研究结果表明:奇异值差分谱理论适用于静电信号去噪,取得了较好的效果;静电信号与摩擦系数同时监测到胶合的发生,具有一致性,并且静电在线监测技术能够在胶合故障发生前监测到异常,为视情维修提供支持;静电信号反映了4个阶段(磨合磨损,稳定磨损,早期胶合以及胶合阶段);在稳定磨损阶段,摩擦系数随载荷的增大而降低,随转速的升高而降低,静电信号均方根值随载荷的变化很小,随转速的升高而增大.
The self-made static electricity sensor is used to carry out the on-line monitoring experimental research on the point contact sliding friction of bearing steel under lubrication condition.Firstly, the static electricity generation mechanism and static electricity induction principle of the wear process are analyzed, and the static electricity sensor of wear area is designed and developed, The effects of load and speed on the friction coefficient and electrostatic signal are analyzed.The results show that the singular value difference spectrum theory is suitable for the denoising of static signals and has achieved good results. Signal and friction coefficient are monitored at the same time, the occurrence of gluing is consistent, and static on-line monitoring technology can detect abnormalities before the gluing fault occurs, providing support for condition-based maintenance. Electrostatic signals reflect the four stages of wear-in wear and stable wear , Early gluing and gluing stage). In the stage of steady wear, the friction coefficient decreases with the increase of load and decreases with the increase of speed. The rms value of static signal varies little with the load. With the increase of speed, Increase.