First, the centrifugal pump easy to attack problems and disposal 1.1 pump can not start or start the cause of the load and disposal methods are as follows: (1) The prime mover or power is not normal. Disposal method is to check the power and prime mover condition. (2) pump stuck. Disposal method is to use hand-drive coupling inspection, if necessary, crash inspection, eliminate the local and animal health problems. (3) packing pressed too tight. Disposal is to relax the packing. (4) discharge valve is not closed. Disposal is to close the discharge valve, restart. (5) balanced pipe is not smooth. Disposal is dredging balanced pipe. 1.2 pump can not start or start the load of the causes and solutions are as follows: (1) lack of filling pump (or pump gas is not row finished). Disposal is to re-irrigation pump. (2) The pump is not turning properly. Disposal method is to check the direction of rotation. (3) pump speed is too low. Disposal method is to check the speed, speed improvement. (4) filter infarction, the valve is not working. Disposal method is to check the filter, eliminate debris. (5) suction height is too high, or the suction tank vacuum. Disposal is to reduce the suction height; check the suction tank pressure. 1.3 pump drainage after the influx of causes and solutions are as follows: (1) suction pipe leakage. Disposal method is to check the suction side of the pipe joints and stuffing box sealing condition. (2) Suction side of the pump gas is not discharged finish. Disposal is the request to re-pump. (3) inhalation side suddenly blocked by foreign bodies. Disposal is to stop pumping foreign matter. (4) Inhalation of large amounts of gas. Disposal is to check whether the whirlpool inlet, swallow depth is too shallow. 1.4. The reasons for the lack of traffic and disposal methods are as follows: (1) with b, c. The solution is to take corresponding measures. (2) System static head increased. Disposal method is to check the liquid height and system pressure. (3) resistance loss increases. Disposal is to check the pipeline and check valve and other obstacles. (4) shell and impeller wear ring wear too much. Disposal is to change or repair wear ring and impeller. (5) other parts of leakage. Disposal method is to check the seal and other parts. (6) pump impeller infarction, wear, corrosion. Disposal methods are cleaning, inspection, exchange. 1.5. The causes and solutions of insufficient head are as follows: (1) Same as (1), (2), (3), (4), c (1), d (6) of b. The solution is to take corresponding measures. (2) impeller mounted anti (double suction wheel). Disposal is to check the impeller. (3) liquid density, viscosity and design conditions do not match. Disposal method is to check the physical properties of the liquid. (4) the operation flow is too large. Disposal is to reduce traffic. 1.6. The reasons for the large power consumption during operation and the solutions are as follows: (1) impeller and wear ring, impeller and shell have grinding 檫. Disposal is to check and repair. (2) Same as e (4) above. Disposal is to reduce traffic. (3) Liquid density increases. Disposal is to check the liquid density. (4) packing pressed too tight or dry friction. Disposal is to relax the filler, check the water seal tube. (5) bearing damage. Disposal is to check repair or change bearings. (6) speed is too high. Disposal method is to check the driver and power supply. (7) shaft bending. Disposal is to correct the pump shaft. (8) axial force balance installation failed. Disposal is to check the balance hole, the water pipe can infarction. (9) Coupling misalignment or axial clearance is too small. Disposal is to check the alignment and adjust the axial clearance. 1.7. The causes of vibration or abnormal noise of the pump and its disposal are as follows: (1) Same as (4) and (5), (7) and (9) of f. The solution is to take corresponding 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 of oil due to air or process fluid, poor smoothness, bearing damage. Disposal method is to check, take appropriate measures, such as adjusting the bearing clearance, remove impurities in oil, change 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. Disposal is to check, adjust or change the seal. (4) Vibration frequency is 2 times working speed. Misalignment, loose coupling, seal mounting friction, deformation of the housing, bearing damage, bearing resonance, thrust bearing damage, shaft bending, poor fit. Disposal is to check and take appropriate measures to repair, adjust or change. (5) The vibration frequency is n times the working speed. Pressure pulsations, misalignment, shell deformation, seal friction, pedestal or foundation resonance, piping, machine resonance, disposal methods are the same (4), reinforcement of the root or pipeline. (6) Vibration frequency is very high. Shaft friction, seals, bearings, not fine, bearing vibration, poor shrinkage and so on. Disposal methods with (4). 1.8. The cause of bearing fever and disposal methods are as follows: (1) bearing pad scraping research does not meet the request. Disposal is to repair bearing pads or change. (2) bearing clearance is too small. Disposal is to re-adjust the bearing clearance or scraping. (3) lack of smooth oil, poor oil quality. Disposal is to increase the oil or change the smooth oil. (4) bearing assembly bad. Disposal method is to check the bearing assembly requirements, eliminate the elements of the request. (5) cooling water circuit. Disposal method is to check and repair. (6) bearing wear or loose. Disposal is to repair the bearing or scrapped. If the pine association, compound the relevant bolts. (7) shaft bending. Disposal is to correct the pump shaft. (8) rejection oil ring deformation, rejection oil ring can not rotate, with no oil. Disposal method is to update the oil slinger. (9) Coupling misalignment or axial clearance is too small. Disposal is to check the alignment and adjust the axial clearance. 1.9. The cause of shaft seal heating and disposal methods are as follows: (1) packing pressed too tight or friction. Disposal is to relax the filler, check the water seal tube. (2) water seal and water seal tube dislocation. Disposal is to re-check alignment. (3) flushing, cooling well. Disposal method is to check flushing cooling circulation tube. (4) mechanical seal defective. Disposal is to check the mechanical seal. 1.10. The causes of the large rotor movement and disposal methods are as follows: (1) improper operation, operating conditions away from the pump design conditions. Disposal: Severe operation, the pump has been working in the design conditions left nearly. (2) the balance is not smooth. Disposal is dredging balanced pipe. (3) equalizer plate and equalizer plate material not meet the request. Disposal method is to change the material to meet the requirements of equalizer plate and balanced plate seat. 1.11. The cause of attack water hammer and disposal methods are as follows: (1) due to a sudden power outage, the formation of system pressure fluctuate, showing the discharge system negative pressure, bubbles dissolved in the liquid to escape the presence of gas in the pump or pipeline. Disposal is to purge the gas. (2) high pressure liquid column due to a sudden power outage, the impact of the pump outlet check valve plate. Disposal method is to pump the system of unreasonable drainage pipes, pipe fittings layout to stop transformation. (3) outlet pipe valve
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