Reasonable inspection and maintenance of pump technology and pump maintenance of common problems

Nowadays, the quality requirements of the pump have been more and more strict, and some problems easily left in the process of the pump repair, so if the maintenance is not good, the internal parts will be aged, and then slowly The loss of its use value, more importantly, wasted time to buy a large amount of money. So how should we go about maintaining it?
First, we should always check whether there is any problem with the motor of the pump , especially whether its gear can be rotated and whether its power is as large as it was when purchased. It is not a test for the naked eye look like, but need to detect a given device.
Second, the pump quality is good or bad has been affected by the motor, when the motor power is too low, the amount of water can be extracted less, in the test, we must pump the quality of the motor coil identification, which water pump can work properly is critical.
Third, we must check the water inlet valve in the pump, this part of a direct impact on whether the water pump out.

  Teach you how to solve the pump failure:
1, can not start
First of all, check the power supply situation: whether the connection is solid or not; whether the switch is in close contact; whether the fuse is blown; whether the three-phase power supply is equal or not. If there is an open circuit, poor contact, the fuse blown, lack of phase, should identify the cause and timely repair. Second, check if it is a mechanical failure of the pump itself, common causes are: packing is too tight or clogged with debris between the impeller and the pump body; pump shaft, bearings, leak ring rust live; severe shaft bending and so on. Remedy: relax filler, and clear the flume; open pump remove debris, rust; correction shaft remove or replace the pump shaft.
2, the pump heat
Reason: bearing damage; rolling bearing or bracket cover clearance is too small; shaft bending or two axes are not the same; tape is too tight; lack of oil or poor oil quality; impeller balance hole blocked, impeller out of balance, increasing the direction Thrust on 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; Adjust the tightness of the tape properly; Fill the clean butter and butter About 60% of the gap; clear the balance hole plug.
3, lack of traffic
This is because: power speed does not Matching or belt slippage, the speed is low; Axial flow pump blade installation angle is too small; Lack of head, the pipe is too long or the pipe has a right-angle bend; And impeller partial blockage or impeller defect ; outlet pipe serious water leakage. Remedy: Restore the rated speed, remove the belt grease, adjust the belt tightness; adjust the blade angle, reduce the pump installation position, shorten the pipe or change the pipe curvature; seal the pump leak, compaction packing; clear blockage Change the impeller; replace the leak ring, plug the leak.
4, can not absorb water
        The reason is that there is air in the pump body or inlet gas, or at the end of the valve is not strict Irrigation irrigation dissatisfaction, vacuum pump packing serious leaks, gate valve or beat the door closed lax. Remedy: First water pressure up, and then filled with water pump, and then boot . At the same time check the check valve is tight, piping, fittings leaks, such as found leakage, remove the joint at the joints coated with oil or paint, and tighten the screws. Check the pump shaft seal ring, such as serious wear and tear should be replaced with new pieces. Drain water conduit or leak. Nuts may not be tightened during installation. If the leakage is not serious, can be smeared in the place of leakage or leakage of cement, or coated with asphalt mixture of cement slurry. Temporary repair can be painted wet mud or soft soap. If leaking at the joints, the wrench can be used to tighten the nut, such as severe water must be re-removable, replace the cracked pipe; reduced lift, the pump nozzle is pressed into the underwater 0.5m.
5, severe vibration
Mainly for the following reasons: Electric rotor imbalance; Coupling bad; Bearing wear and tear; Rotating parts of the loose, broken; Pipe stent is not strong and other reasons. Respectively, can be taken to adjust, repair, reinforcement, straightening, replacement and other ways to deal with. The above situation is a common cause of pump failure, not all of them. In practice, failure should be handled in a practical way.
6, supporting power motor overheating
There are four reasons. First, the reasons for the power: high or low voltage, under a specific load, if the voltage range should be rated at + 10% to -5% outside the motor will cause overheating; power supply three-phase voltage asymmetry, power supply three Phase voltage phase imbalance of more than 5%, lead winding group overheating; lack of phase operation, the experience shows that agricultural motor is burned more than 85% due to lack of phase operation, the motor phase loss protection device installed. Second, the reasons for the pump: the choice of power does not support the cart pull the motor, the motor overloaded for a long time to run, so that the motor temperature is too high; start too often, the fixed short-term or intermittent work of the motor system for continuous work. Should limit the number of starts, the correct choice of thermal protection, according to the rated motor on the use of fixed. Third, the reasons for the motor itself: the wrong connection, the wrong shape into Y-shaped Y-shaped, so that the motor temperature rose rapidly; stator windings phase short circuit, short circuit or partial turn to ground, light motor overheating local, serious Broken edge of the cage; squirrel cage broken rotor or defective, the motor running for 1 to 2 hours, the core temperature rose rapidly; ventilation system failure, the fan should check whether the damage, the rotation direction is correct, the ventilation hole is blocked; bearing wear, eccentric sweep chamber so that the rotor core with rotor rub issued metal crash, core temperature rose rapidly, severe motor smoke, or even burned coil. Fourth, the reasons for the work environment: Motor winding damp or dust, oil and other attached to the winding , resulting in reduced insulation. Insulation resistance of the motor should be measured and cleaned, dried; Ambient temperature is too high. When the ambient temperature exceeds 35 ℃, the inlet air temperature is high, the motor temperature will be too high, should seek to improve its working environment. Such as ride shed shade and so on. Note: due to electrical reasons for failure, should obtain a professional qualification certificate of electrician maintenance, illiterate people can not be blindly repaired to prevent personal injury accidents.
7, deep submersible pump is not on the water or a small amount of water
First of all look at the pump current running current and normal operation of the current difference in how much. If the running time than usual (basically the usual current of 2 \ 3), then there are impeller wear, the top of the pump head check valve blockage and other issues. If the current in peacetime is the same, then it is the gasket leakage, pipe leakage, pump leakage and other issues. If the current is greater than usual when running, it is basically OK to wear the problem of wearing parts. In addition, if the cable is broken, the amount of water is the same as usual, but the current will be larger. 3 380V motor current is generally 2.2A. As long as the above reasons are often repaired deep well pump repair staff can be found out.

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