Agricultural submersible pump common fault and maintenance adjustment method Agricultural submersible pump is the main irrigation and drainage machinery for rural domestic water and summer planting. In operation, it is inevitable failure and damage, so that normal pumping can not. Therefore, poor pumping of submersible pumps must be repaired and adjusted to promptly troubleshoot. Skywave pump combined with years of pump experience for you in the farming a busy time saved for the equipment accident concerns, in the safe and stable solution submersible pump fault problem. Unable to start First, check the power supply situation: whether the connector connection is solid; whether the switch contact is tight; 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 whether it is submerged pump mechanical failure, common reasons are: packing is too tight or between the impeller and the submersible pump stuck and clogged with debris; pump shaft, bearings, leakage ring rust live; severe shaft bending Wait. Remedy: relax the filler, clear the diversion trough; open the submersible pump to remove debris, rust; remove the submersible pump shaft to correct or replace the new pump shaft. There are four reasons for overheating of electric motor. 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%, will win over the 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 installed. Second, submersible pump reasons: the choice of power is not complete, small cart pull the motor overload operation for a long time, so that the motor temperature is too high; start too often, the fixed short-term or intermittent work of the motor system 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 △ wrongly connected into a Y-shaped, so that the motor temperature rose rapidly; stator windings have short-circuit between, turn short circuit or local grounding, light motor overheating, severe insulation Burn out; Broken squirrel cage rotor or defective, the motor running 1 to 2 hours, the core temperature rises rapidly; ventilation system failure, the fan should be checked for damage, rotation direction is correct, the ventilation hole is blocked; bearing wear, the rotor Eccentric sweep bore to make the rotor core rubbed metal percussion sound, the core temperature rose rapidly, the motor smoke in serious cases, and even the coil burned. 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 scaffolding shade and so on. Reminded: due to electrical reasons for failure, should obtain professional qualifications electrician maintenance, knowledgeable people can not be blindly repaired to prevent personal injury accidents.
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