金川二选磨浮车间现有4台DB50YX-40单级单吸立式液下离心泵，为浮选输送稀释后的浮选药剂。该泵自1998年初使用以来维修较为频繁，泵轴经常断裂，泵的轴承、叶轮和轴套全部磨损，不能使用。有时一个星期要修2次，最好的情况能运转一个月。从该泵的使用情况，以及我们对其多次进 Jinchuan second election grinding shop existing four DB50YX-40 single-stage single-suction vertical centrifugal pump for the flotation of diluted flotation reagents. The pump has been used more frequently since its initial use in early 1998. The pump shaft often breaks and the pump bearings, impellers and bushings are all worn out and can not be used. Sometimes two times a week to repair, the best case can run for a month. From the use of the pump, and how many times we have entered it