Magnetic pump failure treatment Jia Zhifeng magnetic pump often runs during the operation of the motor, the working current is normal, and the remote data transmission of the station control room shows no change in the oil density value. However, on-site manual sampling of oil samples can confirm the arrival of oil. The pump body was observed to have slight vibration and mechanical noise. The analysis concluded that the internal magnetic rotor of the pump did not rotate synchronously. After the magnetic rotor in the pump is stuck, the impeller does not rotate, so the density meter shows that the density value does not change. The motor does not turn off in time to form an idling, which is very likely to damage the inner rotor of the pump.
Equipment Management and Maintenance 2013 Noll machine, technical specifications require that the lubricating oil of the power cylinder contains sulphated ash <0.1%, in order to reduce the power cylinder, power piston, power piston ring and spark plug carbon, so the engine crankcase and power cylinder lubricant still Use the original Mobil Pegasus 801, no change.
Before the implementation of the process part, the DPC-600 unit only uses one type of oil (Mobil Pegasus 801. After the implementation of the improvement, the unit oil needs to use two kinds (Mobil Pegasus 801 and Mobil 600W cylinder oil), so the unit needs to be lubricated. System implementation improvements.
(1) Dispose of the two-chamber oiler. Install the screw plug on the NPT1/8-inch communication hole on the middle spacer to make the two-chamber oiler compress and the power oil tank independent.
(2 compressor cylinder and packing oil pump are changed to side suction pump, size 3/8 inch.
One 208L high fuel tank with oil gauge. Since the compressor cylinder and packing lubricant were changed to Mobil 600W cylinder oil, the actual 208L oil drum was used. A self-made high-position fuel tank bracket is installed and fixed on the body of the No. 2 compression cylinder. The new processing side suction pump enters the oil inlet pipe and connects the two side suction pumps. Newly made Z1/4 inch of 18 teeth per inch and 9/16 inch fixed pitch series double male joints of 20 teeth per inch. One new ZG3/4 inch and Z1/4 inch adapter.
3/4 inch steel tube is about 5m, 3/4 inch ball valve, oil toughness, and 3/4 inch 90 elbow.
Through the above improvements, hidden dangers are eliminated. After the improvement, the unit is operating normally, and no faults or accidents caused by improper lubrication occur. When the material gas of the device changes, the process gas composition of the unit inlet should be tested and analyzed in time. The process gas becomes very lubricated by the cylinder. In actual production, in addition to paying attention to the size of the compressor cylinder oil injection, it should also pay attention to whether the performance of the lubricating oil meets the requirements. At the scene, the oil film on the cylinder wall of the compressor and the surface of the piston rod can be inspected to finally determine the amount of oil that can meet the lubrication requirements, and verify the correctness of the oil selection. Proper selection of compressor cylinder lubricants and determination of a reasonable amount of oil injection is extremely important for production costs and operational safety of the compressor. W13.11-38 Southwest Oil and Gas Field Tarim Oil and Gas Engineering Branch Xinjiang Korla City [Edit Li Wen] disintegration magnetic pump, pay attention to protect the graphite gasket in the middle opening. Pulling the motor out of the axial direction shows that the impeller is intact and there is no sign of looseness, and impurities in the rotor cannot be manually rotated.
Remove the impeller with the diversion port (be careful not to damage the diversion port) and check the degree of wear of the rotor sliding bearing. The sliding bearing is made of silicon carbide, with slight cracks on the working end face and partial shedding of the non-working surface silicon carbide. Pull out the rotor inside the isolation sleeve. The inner magnetic rotor and the isolation sleeve are filled with impurities (normal gap 0.8~L5mn), causing the rotor to not rotate normally. Use a special puller to remove the inner magnetic rotor vertically and clean the inner magnetic rotor and the insulation inside the isolation sleeve.
Replace the damaged self-lubricating plain bearing outer ring, clean the inner wall of the diversion hole, burr the surface of the inner magnetic rotor, and put the rotor back into the isolation sleeve to check whether the contact surface is smooth and the rotation is flexible. The impeller is reloaded, and the rotor and the impeller are eccentrically designed. At the time of assembly, the centering should be paid attention to. After the tightening is completed, the impeller should be manually moved more than 2 times. Visually check whether the impeller has a swing phenomenon to confirm whether the rotor and the impeller are concentric. Check the open gasket in the cleaning and reload the pump body. Fasten the opening surface of the pump body and the motor anchor bolts, close the drain valve, open the inlet valve to test the oil pressure, open the exhaust valve to drain the gas inside the pump, and prepare for the power transmission after the completion of the work, and the fault is eliminated.
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