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本文在对ＡＭ－５００采煤机井下使用情况充分调研的基础上，采用故障树分析法对其主油泵故障及原因进行了分析，提出了提高主油泵可靠性的措施。
Based on the full investigation of the downhole usage of the AM-500 shearer, the fault tree analysis was used to analyze the failure of the main oil pump and the reasons for the failure. The measures to improve the reliability of the main oil pump were put forward.