Precautions for water cooled motor
(1) water-cooled air-cooled motor during normal operation of temperature should not exceed the permitted limits. When running, the personnel on duty should always pay attention to monitor the temperature of each part. (2) monitoring water-cooled air-cooled motor load current. Water-cooled air-cooled motor overload or failure occurs, can cause the stator current surge, water-cooled air-cooled motor overheating. Electrical equipment should have current meter monitor water-cooled air-cooled motor load current, the normal operation of water-cooled air-cooled motor load current shall not exceed the rated current value stipulated in the nameplate. (3) to monitor the change of supply voltage, frequency and voltage unbalance degree. The power supply voltage and frequency is too high or too low, three-phase voltage imbalance will cause current unbalance, can cause water-cooled air-cooled motor overheating or other abnormal phenomena. Current unbalance degree should not exceed 10%.
Pay attention to the smell of water-cooled air-cooled motor, vibration and noise. Winding due to temperature too gao will send insulation focal flavour. Some faults, especially the mechanical failure, will soon be reflected as the vibration and noise, so the smell coke or found abnormal vibration or scratches or the hum of the super-large or other noise, power check immediately. (5) always check the heat of the bearing, the oil leakage, change the lubricating oil regularly, and the roller bearing grease should not exceed 70% of the bearing room volume. (6) of wound rotor type water-cooled air-cooled motor, check the contact between the brush and slip ring, brush wear and spark, such as spark serious must clean up the surface of the collector ring, timely and correct the brush spring pressure. (7) keep water-cooled air-cooled motor internal clean, there is no water, oil and debris fell into internal water-cooled air-cooled motor. Air inlet must be kept clear of water-cooled air-cooled motor.
The principle of clean water clean without impurities, he from the water pump of high pressure cavity, namely outlet introduction part on the outside of the motor cooling water rinse, then back to the low pressure chamber of the pump, the pump inlet, so can bring heat away due to no fan motor, the motor temperature constant. Winter must also be used, if water shortage can burn the motor. Upstairs is the submersible motor, which is a different thing
Must be no impurities of water, water cooled motor must be used in the water, because of his chosen high magnetic saturation, winding circle number is less, all by water cooling, away from the water run for a few minutes will be burned.
