Inspection and maintenance of shielding pump method: Maintenance method is: Explosion shield pump disintegration: the first part of the clean-up, and then make an apparent inspection of them, whether there is any exception. Then measure the size of the key parts, electrical inspection of the motor windings. First, the electrical inspection: 1, DC resistance check: unbalance of three-phase resistance shall not exceed 2%. 2, insulation resistance check: Insulation resistance of stainless steel shield pump motor windings can generally reach more than 100MΩ. Such as less than 5MΩ need to analyze the reasons for insulation is damp, or shielding the leak if there is no problem, such as leakage through the stator shield no problem, then purely moisture insulation, the need for drying treatment, such as stator shield has a problem, You need to change the shielding sleeve. Second, the mechanical inspection: 1, measuring the diameter of graphite bearings and shaft sleeve diameter, and look at their mating surface finish. Such as graphite bearings and bushings with clearance over the provisions of maintenance standards (0.55-11kw with the gap, the diameter difference of 0.4 mm, 15-45kw with the gap, the diameter difference of 0.5 mm) or with poor surface finish, the need to be replaced according to circumstances Bearings, bushings or thrust plates. Import pump valve industrial washing machine 2, measuring the impeller's upper and lower outer stop and their matching buckle and pump seat size of the inner diameter, the two with the clearance is within the scope of the overhaul standards, ultra-poor Need to replace the parts or take other measures (such as: surfacing, set) to meet the requirements of the gap. Otherwise it will affect the pump performance, flow, lift, axial balance and so on. 3, observe the inspection set, the apparent state of the rotor shield sleeve, with particular attention to whether there is any abnormal weld, if necessary, should be testing, leak check. 4, after long-term operation, the rotation part of the balance may change. Therefore, it is necessary to rotate the rotor together with the impeller and other rotating parts assembled to do dynamic balancing test.