1. Pump can not start or start the load causes and treatment are as follows: (1) The prime mover or power is not normal. Approach is to check the power and prime mover situation. (2) pump stuck. Approach is to use hand-drive coupling inspection, disintegration inspection, if necessary, to eliminate static and dynamic part of the fault. (3) packing pressed too tight. The treatment is to relax the packing. (4) discharge valve is not closed. Approach is to close the discharge valve, restart. (5) balance pipe is not smooth. Approach is to clear the balance tube. (2) The pump is not enough (or the gas in the pump is not finished). The method is to re-pump. (2) The pump is not turning properly. Approach is to check the direction of rotation. (3) pump speed is too low. Approach is to check the speed, increase speed. (4) filter plug, the valve is not working. Approach is to check the filter to eliminate debris. (5) suction height is too high, or vacuum suction tank. Approach is to reduce the suction height; check the suction tank pressure. 3. Pump after the interruption of liquid discharge and treatment methods are as follows: (1) suction pipe leakage. Approach is to check the suction side of pipe connections and stuffing box seal. (2) Suction side of the pump gas is not discharged finish. Approach is to require re-irrigation pump. (3) Suction side suddenly blocked by foreign bodies. Approach is to stop the pump processing foreign body. (4) Inhalation of large amounts of gas. Approach is to check whether the inlet whirlpool, submerged depth is too shallow. 4. The reasons for lack of flow and treatment as follows: (1) with b, c. Approach is to take appropriate measures. (2) System static head increased. Approach is to check the liquid height and system pressure. (3) resistance loss increases. Approach is to check the pipeline and check valve and other obstacles. (4) shell and impeller wear ring wear too much. Approach is to replace or repair wear ring and impeller. (5) other parts of leakage. Approach is to check the seal and other parts. (6) pump impeller blockage, wear, corrosion. Treatment is cleaning, inspection, exchange. 5. The cause of insufficient lift and its treatment are as follows: (1) Same as (1), (2), (3), (4), c (1), d (6) of b. Approach is to take appropriate measures. (2) impeller mounted anti (double suction wheel). Approach is to check the impeller. (3) liquid density, viscosity and design conditions do not match. The solution is to check the physical properties of the liquid. (4) the operation flow is too large. The solution is to reduce the traffic. 6. Power running in large causes and treatment methods are as follows: (1) impeller and wear rings, impeller and shell grinding 檫. Approach is to check and repair. (2) Same as e (4) above. The solution is to reduce the traffic. (3) Liquid density increases. The solution is to check the liquid density. (4) packing pressed too tight or dry friction. Treatment is to relax the filler, check the water seal tube. (5) bearing damage. Approach is to check repair or replacement of bearings. (6) speed is too high. Approach is to check the driver and power supply. (7) shaft bending. The treatment method is to correct the pump shaft. (8) Axial force balance failed. Approach is to check the balance hole, the return pipe is blocked. (9) Coupling misalignment or axial clearance is too small. Approach is to check the alignment and adjust the axial clearance. 7. Pump vibration or abnormal sound causes and solutions are as follows: (1) with c (4), f (5), (7), (9). Approach is to take appropriate measures. (2) The vibration frequency is 0 ~ 40% working speed. Too large bearing clearance, loose bearings, impurities in the oil, bad oil (viscosity, temperature), blistering due to air or process fluid, poor lubrication, bearing damage. Treatment is checked, take appropriate measures, such as adjusting the bearing clearance, remove impurities in the oil, replace the new oil. (3) Vibration frequency is 60% ~ 100% working speed. The same bearing on the problem (2), or seal gap is too large, Loosening ring, seal wear. Approach is to check, adjust or replace the seal. (4) Vibration frequency is 2 times working speed. Misalignment, loose coupling, seal friction, shell deformation, bearing damage, bearing resonance, thrust bearing damage, shaft bending, poor cooperation. Approach is to check, take appropriate measures to repair, adjust or replace. (5) The vibration frequency is n times the working speed. Pressure pulsations, misalignment, shell deformation, seal friction, support or foundation resonance, piping, machine resonance, treatment methods are the same (4), strengthening the foundation or piping. (6) Vibration frequency is very high. Shaft friction, seals, bearings, imprecise, bearing jitter, poor shrink fit and so on. The same treatment (4). 8. Bearing fever and treatment methods are as follows: (1) bearing pad scraping unqualified. Approach is to repair bearing pads or replacement. (2) bearing clearance is too small. Approach is to re-adjust the bearing clearance or scraping. (3) Lack of oil, poor oil quality. Approach is to increase the oil or replace the oil. (4) bearing assembly bad. Approach is to check the bearing assembly requirements, eliminating unmet requirements. (5) cooling water circuit. Approach is to check and repair. (6) bearing wear or loose. Approach is to repair the bearing or scrapped. If the pine association, compound the relevant bolts. (7) shaft bending. The treatment method is to correct the pump shaft. (8) rejection oil ring deformation, rejection oil ring can not rotate, with no oil. Approach is to update the oil slinger. (9) Coupling misalignment or axial clearance is too small. Approach is to check the alignment and adjust the axial clearance. 9. The causes of shaft seal heat and treatment are as follows: (1) packing pressed too tight or friction. Treatment is to relax the filler, check the water seal tube. (2) water seal and water seal tube dislocation. Approach is to re-check alignment. (3) flushing, cooling well. Approach is to check flushing cooling circulation tube. (4) Mechanical seal is faulty. Approach is to check the mechanical seal. 10. The reasons for the rotor movement and processing methods are as follows: (1) improper operation, operating conditions away from the pump design conditions. Approach: Strict operation, so that the pump is always running near the design conditions. & nbsp
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