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How to solve the water pump failure? Water pump seven typical faults and solution

Time: 2016/5/21 19:41:01
1, could not be started
Should first check the power supply situation: jolong connection is strong; Whether the switch contact closely; If the fuse fusing; Three-phase power supply is short of equal. If there is open circuit, poor contact, fusing, lack of phase, should find out the reason and repair in time. Second check whether the water pump mechanical failure, common reasons are: packing too tight or between the impeller and the pump body is sundry jam and jam; Pump shaft, bearings, minus leakage ring rust to live; Pump shaft severe bending, etc. Method: relax packing, dredge flume; Disassemble pump body to remove debris, rust; Remove the pump shaft correction or replacement of the new pump shaft.
2, heat pump
Reason: bearing damage; Rolling bearing or bracket cover gap is too small; Pump shaft bending or two different axis; Belt is too tight; Lack of oil or oil; Impeller balance hole plugging, impeller out of balance, increases the thrust to one side. Method: the replacement of bearing; Demolition of rear cover in the bracket with shim between bearing; Survey the pump shaft or adjust the two shaft concentricity; The appropriate loose belt tightness; Supplying clean butter, butter accounted for about 60% of the bearing inner space; Clean up balance hole plugs.

3, lack of traffic

This is because: power speed don't match or belt creep, the rotational speed is low; Axial flow pump blade installation Angle is too small; Lift is insufficient, pipe line is too long or pipe elbow bend; On the high side suction; Local blockage or bottom valve, pipe and impeller impeller defect; Outlet pipe leaking badly. Excluded methods: restore the rated speed, remove belt oil dirties, adjust the belt tightness; Adjusted the blade Angle, reduce the water pump installation location, and shorten or change the pipe bending; Sealing water pump leakage, pressure packing; Unclog, replace the impeller; Replacement minus leakage ring, plug leaks.

4, no water absorption
Reason is that there is air in the pump body or feed line pneumatosis, or bottom valve closed lax irrigation water diversion discontent, vacuum packing serious leakage, a gate or door closed lax. Method: the water first, again will pump body filled with water, and then switched on. Check whether the check valve is tight at the same time, pipe, jolong presence of air leakage phenomenon, leakage is found, after removal in tapping coated with lubricating oil or mixed palong, and screw down the screws. Check the pump shaft seal ring, such as severe worn should replace a new one. Piping water or air. May be installed when the nut is not tight. If leakage is not serious, but in a flat or a leaking place daub cement, or coated with asphalt mixing the slurry oil. A temporary repair can put some wet mud or soft soap.

4, no water absorption

Reason is that there is air in the pump body or feed line pneumatosis, or bottom valve closed lax irrigation water diversion discontent, vacuum packing serious leakage, a gate or door closed lax. Method: the water first, again will pump body filled with water, and then switched on. Check whether the check valve is tight at the same time, pipe, jolong presence of air leakage phenomenon, leakage is found, after removal in tapping coated with lubricating oil or mixed palong, and screw down the screws. Check the pump shaft seal ring, such as severe worn should replace a new one. Piping water or air. May be installed when the nut is not tight.If leakage is not serious, but in a flat or a leaking place daub cement, or coated with asphalt mixing the slurry oil. A temporary repair can put some wet mud or soft soap. If the jolong leakage, usable spanner tighten nut, such as leakage serious it must be to tear open outfit, replace the crack pipe; Reduce the head, to press the pump nozzle longo underwater 0.5 m.

5, violent vibration
Basically has the following several reasons: electric rotor imbalance; Coupling bad; Bending bearing wear; Rotating parts of parts loose, rupture; Piping bracket rickety wait for a reason. Respectively to adjust, repair, strengthening, alignment, replacement, etc. To deal with. The above situation is a common cause of the water pump failure, and not all reason, dealing with faults in the practice, due to the actual analysis, should follow the principle of the outside before, do not blindly.

6, the necessary power motor overheating
There are four reasons why. One of the reasons of the power supply is: high or low voltage, under certain load, if the voltage fluctuation range should be + 10% to 5% of the rating outside cause overheating; Asymmetrical three-phase voltage, three-phase electric voltage and unbalanced degree is more than 5%, will lead winding overheating; Lack of phase operation, experience shows that agricultural motor burned down more than 85% are caused by lack of phase operation, motor protection device installation phase.The second is the pump reasons: choose power don't match, a small cart, electric machine long time overload running, make the motor temperature is too high; Start too frequently, quota of short-time or longermittent duty of motor, continuous work.Start times should be limited, correctly chooses thermal protection, according to the motor on the calibration of the norm. 3 it is the cause of the motor itself: connection error, delta shaped misconnection longo Y, make motor temperature rise rapidly; Stator winding turn-to-turn short circuit or local longerphase short circuit, grounding, partial light when motor overheating, serious when insulation burn out; Squirrel cage rotor broken bar or flaws, motor run 1 to 2 hours, core temperature rising rapidly; Ventilation system failure occurs, should check whether the fan is damaged, the direction of rotation is correct, vent blockage; Bearing wear, swept rotor eccentricity chamber makes the stator iron core facies to wipe a clang, core temperature rising rapidly, serious when motor smoke, even coil burned.Four is the work environment reasons: motor winding be affected with damp be affected with damp or dust, oil and other adhesion on the winding, results in the decrease of insulation. Should measure the insulation resistance of the motor and cleaning, drying, processing; The environment temperature is too high.When the environment temperature more than 35 ℃, inlet air temperature is high, can make the temperature of the motor is too high, should try to improve their working environment. Such as scaffolding shade, etc. Note: because of reasons of electrical failure, should please the professional qualification certificate for electrical malongenance, a man should not only learn malongenance blindly, to prevent personal injury accidents.
7, small submersible deep-well water or water
First look at the pump running at this time and normal operation of current difference. If smaller than normal run time (2, 3) is basically a current at ordinary times, then there is pump impeller wear, the check valve on the top of the head congestion problems.If peace as large current, then is the gasket leaking tube, pipe burst, pump body leakage and other problems. If the current run time than usual, so basically is a problem of wear parts, can be determined. In addition, cable, if broken, water like at ordinary times is great, but the current get bigger. Three 380 v motor current is 2.2 A. All these reasons as long as it is often the malongenance of the deep well pump repair personnel can be found out.