What should I do if the bus fire extinguishing DC pump vibrates seriously?

First half text《What should I do if the bus fire extinguishing DC pump cannot be started?》Introduces how to deal with the problem that the fire pump cannot be started, but what should I do if the fire pump vibrates seriously? We know that although the pump has noise and vibration, severe vibration is abnormal and will affect the operation of other parts in the long run. Therefore, if the fire pump is found to be vibrating seriously, we must repair it in time, as followsBus fire extinguishing DC pumpThe manufacturer introduces specific solutions for you:

1. First check whether the fire pump and motor shaft are concentric

When the pump is running, the pump shaft drives the impeller to rotate at high speed to drive the liquid. The energy obtained by the impeller is obtained from the pump shaft, and the energy obtained by the pump shaft is provided by the electric motor. If the pump body and pump shaft are not installed concentrically, it will cause the impeller to deviate and rub against the pump casing, resulting in vibration. In severe cases, the impeller and pump casing will be damaged.

Adjust and align the fire pump and motor axis.

2. Whether the fire pump shaft is bent?

Remove the pump shaft and straighten it, or replace it with a new one.

3. Is the impeller balanced?

Remove the impeller and find the balance

4. The parts of the rotating part are loose or broken; the pipeline bracket is not strong

When the centrifugal fire pump is operating, the impeller rotates at high speed. If the installation of the centrifugal fire pump is not firm, or the fasteners become loose due to long-term operation, the pump will produce vibration and noise during operation, and may even be damaged in a short period of time.

It is necessary to reinforce, straighten and replace damaged parts in time

5. Wear between impeller and sealing ring

If the impeller and sealing ring cannot be confirmed to be in good lubrication condition, wear will occur between the two and the gap will increase. When the gap exceeds a certain value, it will cause vibration and noise in the pump. The degree of wear increases with the running time of the pump.

Replace the sealing ring and add lubricating oil in time

6. Cavitation causes abnormal sound inside the pump

Excessive resistance in the suction pipeline, loose sealing, leakage of air, excessive temperature of the liquid being sucked, excessive flow rate, etc. will cause cavitation, resulting in abnormal sounds or violent vibrations in the pump.

Find the cause and correct it