Common Faults and Maintenance Methods of ISG Pipe Centrifugal Pumps
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First of all, the power supply should be checked: whether the connector connection is firm, whether the switch contact is tight, whether the fuse is blown, and whether the three-phase power supply is equal. If there is a broken circuit, bad contact, blown fuse, or lack of phase, the cause should be identified and repaired in a timely manner. Secondly, check whether the pump itself is mechanically faulty. The common causes are: too tight packing or jamming between the impeller and the pump body caused by debris; the pump shaft, bearing, and the leakage reduction ring are rusted; the pump shaft is seriously bent. Remedy: Relax the packing and unclog the sink; disassemble the pump body to remove impurities and remove rust; remove the shaft calibration or replace the new pump shaft.
Second, ISG pipeline centrifugal pump supporting power motor overheating 1. Power reasons: the voltage is high or low, under a specific load, if the voltage range should be in the rated value of +10% to -5% will cause the motor to overheat The three-phase voltage of the power supply is not symmetrical, and the phase-to-phase unbalance of the power supply three-phase voltage exceeds 5%, which will lead to overheating of the windings. In the absence of phase operation, experience shows that more than 85% of the agricultural motors are burned because of missing phase operation. Phase protection device.
2. The reasons for the pump: The use of power is not matched, the small horse-drawn cart, the motor overload operation for a long time, so that the motor temperature is too high; the motor is started too frequently, fixed for a short time or intermittent work of the motor. Limit the number of start-ups, use thermal protection correctly, and use the rated value on the motor.
3. The reason of the motor itself: connection error, mistakenly connecting â–³ shape into Y shape, so that the temperature of the motor rises rapidly; the stator windings have phase-to-phase short circuit, turn-to-turn short circuit or partial grounding, and the motor partially overheats when light, and the insulation is severe. Burnout; squirrel cage rotor broken or defective, the motor running for 1 to 2 hours, the core temperature rose rapidly; ventilation system failure, should check whether the fan is damaged, the rotation direction is correct, the ventilation hole is blocked; bearing wear, rotor Eccentric brooms cause the stator core to rub off metal impact sounds. The temperature of the iron core rises rapidly. In serious cases, the motor smokes and even the coil burns.
4. Causes of work environment: The motor windings are damp or dust, oil, etc. adhere to the windings, resulting in reduced insulation. The insulation resistance of the motor should be measured and cleaned and dried; the ambient temperature is too high. When the ambient temperature exceeds 35°C, the high intake air temperature will cause the motor's temperature to be too high, and efforts should be made to improve its working environment. Such as scaffolding shade and so on. Shanghai Liangong Pump Industry Co., Ltd. reminds that if there is a failure due to electricity, an electrician who has obtained a professional qualification certificate is required to repair it. A person with little knowledge should not blindly repair it to prevent personal injury accidents.
Three, ISG pipeline centrifugal heat pump <br> <br> reasons: bearing damage; rolling bay cover or gap is too small; bent shaft or two shaft misalignment; tight tape; starved or oleaginous bad; wheel The balance hole on the plug is blocked and the impeller loses its balance, increasing the thrust to one side. Remedy: replace the bearing; remove the back cover, install the gasket between the bracket and the bearing seat; investigate the pump shaft or adjust the concentricity of the two shafts; properly loosen the tightness of the tape; add clean butter, butter to occupy the bearing About 60% of the internal void; clear the blockage in the balance hole.
IV. Insufficient flow of ISG pipeline centrifugal pump
This is because: the power speed is not matched and the speed is low; the installation angle of the axial pump blade is too small; the head is insufficient; the pipeline is too long or the pipeline has a right angle bend; the suction stroke is high; the bottom valve, the pipeline and the impeller are partially Plug or impeller defect; water leakage from the outlet pipe is serious. Remedy: Recover the rated speed, adjust the blade angle, reduce the installation position of the pump, shorten the pipeline or change the curvature of the pipeline; seal the leakage point of the pump, compress the packing; remove the plug, replace the impeller; replace the leakage reduction ring, Block the leak.
V. Shanghai Liangong Pump ISG Pipe Centrifugal Pump Does Not Succeed
Check whether there is air in the pump body or water in the inlet pipe, or if the bottom valve is closed, the water is not filled properly, the vacuum pump is filled with gas, and the gate valve or flap door is not closed. Remedy: Press water first, fill the pump with water, and turn it on. At the same time, check whether the check valve is tight and whether there is any air leakage in the pipes and fittings. If air leakage is found, apply lubricant or paint to the joint after disassembly, and tighten the screws. Check the oil seal ring of the pump shaft. If it is worn out, replace it with a new one. The pipe leaks or leaks. The nuts may not be tightly tightened during installation. If the leakage is not serious, you can apply cement at the place where the air leaks or leaks, or apply cement paste mixed with asphalt oil. Temporary repairs may be coated with wet mud or soft soap. If there is water leakage at the joint, tighten the nut with a wrench. If the water leakage is serious, you must disassemble and replace the cracked pipe. If you reduce the lift, push the pump nozzle into the water for 0.5m.
Sixth, Shanghai Liangong ISG pipe centrifugal pump violent vibration
There are several main reasons: the unbalance of the electric rotor, the poor coupling, the bending of the bearing, the loose and broken parts of the rotating parts, and the inability of the pipe support. Can be adjusted, repaired, reinforced, straightened, replaced, etc.