| 摘要 |
<p>PURPOSE:To judge each service life of an inducer and an impeller in an accurate manner by attaching a sensor capable of detecting a cavitation and calculating the depth of erosion to be produced and its area from the integrated value of strength and frequency of this detected cavitation. CONSTITUTION:A sensor 1 is attached to a casing 4 in and around a suction opening 3 of a pump 2 whereby there is unnecessary to detect other vibrations including any deflection in a bearing or the like, so that a cavitation is accurately detected. The product of strength and frequency in vibrational acceleration when the cavitation detected by the sensor 1 has occurred is integrated. Then, this integrated value is compared with depth of erosion actually generated in an inducer 5 and an impeller 6 and its area, and thereby correlation data with this integrated value is made up when the inducer 5 and the impeller 6 are reached to their service life. On the basis of these data, depth of the erosion that might be produced in the inducer 5 and the impeller 6 and its area are calculated from the integrated value afterward, thus service life of the pump 2 is estimated in this way.</p> |
