The rocker arm gear box is a fault prone part of shearer.The fault location of the rocker arm gear box of 7LS06 shearer commonly used in underground coal mining was diagnosed,and it was found that its reduction gear and bearing often failed,because the gear and bearing would produce a fixed vibration frequency under normal operation,and defects or faults would lead to changes in its structure,thus the original vibration frequency would be changed.Therefore,vibration test platform was used to obtain the vibration signal of shearer gear box,and the test results were compared with the field monitoring results,which further verified the reliability of fault diagnosis technology.
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