A FAILURE ANALYSIS OF A MASSIVE EXCAVATOR REDUCTION GEAR IN SURFACE MINING USING VIBRATION-BASED CONDITION MONITORING

作者：Todorovic P M^*; Babic M J; Veljkovic D Z; Macuzic I D; Colovic Z G; Jeremic B M

来源：Journal of the Balkan Tribological Association, 2011, 17(4): 555-567.

• reduction gear
• vibration
• failure analysis
• signal analysis
• plastic flow

This paper presents a vibration-based failure analysis of the massive reduction gear on an excavator with a cable crowd, which had been identified as a source of high level vibrations. Vibration measurements were made in a time domain using a data acquisition (DAQ) module with an uniform time sampling period. During the measurement, the shaft rotational speed was not constant. Uniformly time-sampled vibration data were digitally resampled to an angle domain using a key phasor signal and a cubic spline interpolation algorithm. By the frequency analysis of a resampled vibration signal, damaged elements of the reduction gear were identified. A substitution of these elements, depending on the measuring points, led to vibration levels being reduced by 2.5 to 14.5 times. A cost analysis showed that the company achieved a significant cost reduction by the application of the described methods.

• 出版日期2011