行星齿轮箱广泛应用于风力发电、航空、船舶等大型工程机械中,恶劣的工作环境使得其中的关键部件容易出现严重的磨损或疲劳断裂等故障。现有的故障诊断方法大多在时、频域中对信号进行处理,然而由于行星齿轮箱振动响应信号频率成分的复杂性和故障传递路径的时变特性,使得传统的针对定轴转动齿轮系统的故障诊断方法很难有效的对行星齿轮箱进行故障诊断。本文抓住行星齿轮系统复合运动的突出特征,结合故障振动传递路径的时变特性,提出了一种基于故障运动特征的潮汐频率特征指标对行星齿轮箱进行故障诊断,并通过对行星齿轮箱太阳轮局部故障的振动数据分析,验证了潮汐频率指标的存在,分析了潮汐频率作为行星齿轮箱故障诊断指标的优势和前景。
Abstract
Planetary gearboxes are widely used in wind turbine, aerospace, marine and other large engineering machines. Harsh operation conditions frequently cause faults, such as pitting and fatigue crack to occur in planetary gearboxes. Most reported fault diagnosis methods use time or frequency domain information. But the general signal processing methods are not effective for planetary gearboxes due to the complexity of vibration signals as well as combined motions of planetary gears. Based on the analysis of the motion to a sun gear, a planet gear and vibration transmission paths, a new characteristic frequency named tidal frequency is proposed as a unique signature for planetary gear system diagnostics. Through experimental signal analysis to the planetary gearbox with a localized fault on the sun gear, it shows the existence of the tide frequency and that the method is effective for planetary gearbox diagnosis.
关键词
行星齿轮箱 /
潮汐频率 /
故障诊断
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Key words
Planetary gear box /
Tide frequency /
Fault diagnosis
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参考文献
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脚注
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