What should I do if the fire pump has excessive power consumption and idling?

Fire pump experts are improving and perfecting the previously used fire pumps. New fire pumps have begun to come into people's sight, and now they have become a very common fire pump. Then you should pay more attention to some aspects when using this kind of fire pump, because there are many functions added to this kind of fire pump, so it may not be compatible with other equipment, and of course there will be some big and small problems. When using fire pumps, many people report that this kind of fire pump often consumes too much power, so what should be done when this phenomenon occurs, let’s take a look at the two possible reasons below.

1. The impeller is faulty

When the XBD fire pump consumes too much power, one of the things that should be considered is that the impeller is faulty, which must be considered first. This kind of failure may occur when the rotation direction of the impeller is incorrect, then the rotation direction of the impeller should be corrected before working. In addition, if the impeller is damaged, then the impeller with bad track should be replaced in this case.

2. Defects in rotating parts

Another reason for excessive power consumption when using an XBD fire pump is that there may be a big problem with the rotating parts. However, when the rotating parts are seized, the power consumption will be too large, so these should check whether the internal wear of the rotating parts is normal. It can also be that the rotating bearing is bent, then the shaft should be corrected or replaced directly.


The inlet medium of the fire pump is insufficient or the water inlet pressure is not enough, or the water inlet pipe of the fire pump is blocked, or the air in the fire pump cavity is not exhausted. When the fire pump is idling, the impeller has no contact or little contact with the medium, so it cannot work effectively, and the liquid cannot be delivered normally. These are all useless work. Because there is no effective work, the load on the motor is very small, and the current generated is also very small, so there will be no impact on the motor. The impact of idling on the fire pump is indeed fatal to the pump. Idling fire pumps are prone to cavitation, causing damage to the pump body and flow-through parts; idling fire pumps with mechanical seals or packing seals will not be lubricated by liquid, resulting in dry grinding and rapid damage; idling fire pumps Fire pump rotor parts and pump body heat up, without liquid cooling, those narrow gaps (such as sealing rings) are easily seized by the action of heat expansion and contraction; the balance plate of an idling multi-stage fire pump is not lubricated by water, and the balance plate Will be burnt and damaged very quickly.

For early warning and maintenance of fire pump idling, it is recommended to improve the design of fire pump:

1. Treat each clearance position of the fire pump and expand it under permissible conditions to prevent seizure;

2. Carry out special process treatment, quenching and tempering, heat treatment, etc. on the shaft of the fire pump to increase the hardness and use low-flexibility materials to prevent it from being seized by large swings during idling;

3. Use mechanical seals and packing chambers that do not need to be lubricated by liquid media;

4. Choose closed self-lubricating bearings without oiling.

Compared with other fire pumps, the pump cavity of the horizontal self-priming fire pump has a larger space, and there is a place where water can be stored. Before the self-priming fire pump works normally, the cavity should be filled with liquid, and there is a period of self-priming before operation. During this period, the air is continuously discharged out of the pump body. This period is partly idling.