Fault Tree Analysis of Cutting Unit for Shearer MG750-1915

The high reliability of cutting unit is the important link to ensure the reliability of shearer on the whole.Through functional analysis,the functional block diagram and fault tree of the MG750-1915 shearer's cutting unit are built.Three importance indexes of every fault mode are quantitatively analyzed by the RELEX reliability analysis software.Then finds out the fault modes with higher importance index.The unreliability,unavailability and fault frequency of the cutting unit are also analyzed.According to the analysis result,the structure of corresponding parts with higher fault probability is improved to enhance the reliability of shearer on the whole.