Abstract：When the magnetic drive pump slide bearing wear exceeds its limit, the rotating assembly will rub and eventually breach the containment shell, and will cause serious consequence. Therefore, research of a slide bearing wear monitoring method is necessary. Due to complex structure and confined space, such monitoring is however very challenging. A simple, low cost magnetic drive pump slide bearing wear sensor was proposed, which was made only of one piece of wire. According to the physical parameters of the pump and the sensor, the feature curve and the output function of the sensor was established by theoretical analysis and experimental correction. Two sets of sliding bearings were adopted on magnetic drive pump for the feasibility experiment with the sensors: one bearing is normal without eccentricity, the other is of eccentricity. The results show that the error between the measured value and the actual value meets the monitoring requirement. So the detection system built by the sensor can conduct magnetic drive pump slide bearing wear monitoring, and has practical value on improving reliability of magnetic drive pump product.
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