Spectrum analysis of partial failure of shearer rocker gear based on vibration model
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摘要: 从齿轮传动机理出发，考虑直齿轮局部故障对啮合振动的调幅调频作用，建立了直齿轮局部故障振动信号模型；在直齿轮局部故障模型的基础上，分析了行星齿轮结构特征及振动信号产生和变化规律，建立了行星齿轮局部故障振动信号模型。对带有不同齿轮局部故障的摇臂进行加载试验，对采集的试验振动信号进行了频谱分析，分析结果表明，所建立的齿轮故障振动信号模型能客观、准确地反映摇臂齿轮故障状态，应用频谱分析方法可实现摇臂齿轮局部故障诊断。Abstract: A partial failure vibration signal model of spur gear was established starting from gear drive mechanism and considering both amplitude modulation and frequency modulation effects of meshing vibration due to partial spur gear damage. Based on partial failure model of spur gear, structure feature of planetary gear and vibration signal generation and changing rule were analyzed, and partial failure vibration signal model of planetary gear was established. Load test of rocker arm with different gear partial failures and spectrum analysis of collected vibration signal were conducted, the results show that the model of gear fault vibration signal model can objectively and accurately reflect failure state of rocker gear, and using the method of spectrum analysis can achieve partial failure diagnosis of rocker gear.
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Keywords:
- shearer rocker arm /
- spur gear /
- planetary gear /
- partial failure /
- vibration signal /
- spectrum analysis
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