1： Vibration during operation
1. Unstable pipeline support and loose
foundation bolts of high-pressure water pump are the common causes of vibration.
It is necessary to tighten all bolts to prevent loosening.
2. If there is gas
in the liquid, carefully check whether the connecting bolts on the sealing
surfaces of the high-pressure water pump and water inlet pipeline are loose,
whether the sealing gasket is damaged, and whether the pump body and pipeline
system parts are damaged.
3. If the high-pressure water pump is not
concentric with the motor shaft, it should be adjusted. If the rotating belt is
too loose or the joint is not in good contact, it will also cause vibration.
When the impeller of high-pressure pump is running unevenly, it is easy to form
vibration due to wear of impeller or blockage of individual impeller channel,
and sometimes vibration is caused by poor balance of impeller due to shaft
bending.
2： Noise increases during operation
Bearing noise: the sound
source of the bearing device, the iron bar or screw driver is used to support
the bearing device part, and the ear is used to listen, which is a clattering
sound.
Motor noise: it's a howling noise. You can only change the
motor.
Cavitation noise: sound source in the pump cavity, crackling
sound.
3. Hot motor
If the outer wall of the motor is hot, it may run over
current. You can close the outlet valve and adjust it to run within the rated
current. It may also be the quality problem of the motor coil, so the motor can
only be replaced.
The rotating parts show friction, friction resistance
increases, and the motor may be hot due to over current. Therefore, stop the
machine to check whether the rotor is sensitive.
The bearing of the motor is
heated, and the bearing may be short of oil or damaged. It needs to be repaired
or replaced.
The working voltage is too low. Check the circuit and adjust the
voltage.
No water flow after start-up: there is air in the pump or air
accumulated in the inlet pipe, or the bottom valve is not closed tightly, the
water supply is insufficient, the packing of vacuum pump leaks seriously, and
the gate valve or flap valve is not closed tightly.
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