Analysis of cooling tower cooling tower manufacturer common failures and solutions

One, the supporting power motor overheating, there are four reasons why < br / > 1. Voltage is high or low, 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.

　　2. Choose power don't match, a small cart, cooling tower of electric machine long time overload running, make the motor temperature is too high; Start too frequently, quota of short-time or intermittent 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. Connection error, will delta misconnection into Y, make cooling tower motor temperature rise rapidly; Stator winding turn-to-turn short circuit or local interphase short circuit, grounding, partial light when motor overheating, serious when insulation burn out; Squirrel cage rotor broken bar or flaws, cooling tower in the motor run 1 to 2 hours, core temperature rising rapidly; The malfunction of the ventilation system should check whether the cooling tower fan is damaged, direction of rotation is correct, the cooling tower of 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.

　　4. Motor winding be affected with damp be affected with damp or dust, oil, such as 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 ambient temperature more than 35 ℃, inlet air temperature is high, can make the motor temperature of the cooling tower is too high, should try to improve their working environment. Such as scaffolding shade, etc. < br / > note: because of reasons of electrical failure, should please the professional qualification certificate for electrical maintenance, a man should not only learn maintenance blindly, to prevent personal injury accidents. < br / > 2, lack of traffic it is because: < br / > 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. < br / > 3, heat pump: < br / > cooling tower 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 back cover, shim between the bracket of the self-contained cooling tower; 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; Remove balance hole stemming from the cooling tower. < br / > 4, should first check the power supply cannot be started: < br / > joint 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. < br / > 5, the violent vibration basically has the following several reasons: < br / > 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. < br / > < br / > < br >

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