Centrifugal pump operation noise, vibration and repair methods
Centrifugal pump operation noise, vibration failure reasons: 1, centrifugal pump shaft bending, bearing wear or damage. 2, Centrifugal pump unit installation foundation is not strong, fastening screws loose or fall off. 3, the coupling is not the heart or combination is not good. 4, centrifugal pump suction head is too large, resulting in cavitation. 5, part of the centrifugal pump friction. 6, centrifugal pump inlet leakage. 7, centrifugal pump inlet depth is not enough, inhalation of air during work. 8, centrifugal pump drive belt connector is not good. 9, centrifugal pump impeller rotation is not balanced. Centrifugal pump operation noise, vibration maintenance methods: 1, parking disassembly centrifugal pump body, check the pump shaft, bearings. If the pump shaft is bent, the pump shaft should be calibrated to repair or replace; if the bearing wear is serious or damaged, you should replace the new bearing. 2, parking inspection. If the installation foundation of the unit is not firm, the installation foundation of the unit should be re-strengthened; if the anchor screws of the unit are loose or falling off, the unit's ground screws should be matched and fastened. 3, first remove the coupling check, and then correct or replace the coupling to ensure that the two axes concentric, good contact. 4, Correctly calculate the centrifugal pump installation height (to determine the length of the suction pipe), and re-install the pump to reduce the suction head of the pump to eliminate cavitation. 5, through the eyes, ears to find out the friction parts and friction parts, and according to the specific circumstances to be ruled out. If it is due to the axial movement of the pump shaft, causing the front disc and the pump casing friction, you should check and clear the pump pressure balance hole; if it is due to the positioning key of the impeller or lock nut loose, off, causing the impeller ran And friction with the pump shell, it should be reset, locking. 6, using flame method to detect the specific leakage of water suction pipe site, at the wall of the Department of leaks, repair should be taken to block or replace the new tube method; the suction pipe leak at the interface should be taken to use a wrench to tighten the flange The method of tightening the plate after connecting the bolts or changing the contact pads. 7, appropriate to reduce the installation of centrifugal pump height, and to ensure that the suction port immersed in the water below the depth of more than 0.5 meters. 8, Repair or replace the drive belt buckle, press the belt buckle connection requirements of the correct connection. 9, open the pump body, remove the impeller, the impeller balance test and correct the balance. Should not be replaced when the new impeller repair.