one. Vibration during operation 1. Unstable pipe support, loose pump base or anchor bolts are common causes of vibration, bolts must be fastened around to avoid loosening. 2. Liquid gas, carefully check the pump and inlet pipe sealing surface bolts are loose, the gasket is damaged, the pump and piping system components are damaged. 3. Pump and motor shaft is not the heart, should be adjusted, with the belt rotation, the rotation band is too loose or poor contact, can also cause vibration. Pump impeller imbalance in the operation of the impeller wear and tear or individual impeller runner clogging easily lead to vibration, sometimes due to shaft bending impeller bad balance caused by vibration. two. Noise during operation increases 1. Bearing noise: the sound source bearing installation site, usually with a screwdriver or screwdriver to place the bearing installation, with ears, as crashed sound. Motor noise: General is howling, can only replace the motor. Cavitation noise: the sound source in the pump chamber, crackling crackling sound. three. Motor hot Chinese pump technology forum motor outer wall may be hot, super-current operation may be closed small outlet valve to regulate the rated current operation, it may be the quality of the motor coil, it can only replace the motor. 2. Rotating parts appear friction, frictional resistance increases, it may over-current so that the motor is hot should stop checking whether the rotor is flexible. Motor bearing fever, the bearing may be lack of oil or damage, the need to repair or replace the bearing. Working voltage is too low, check the circuit to adjust the voltage.
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