The centrifugal pump is idling because the inlet medium of the pump is insufficient or the inlet water pressure is not enough, or the inlet pipe of the pump is blocked, or the air in the pump cavity is not exhausted.

During the operation of the centrifugal pump, the idling of the pump is not allowed. Most centrifugal pumps use mechanical seals. As long as the centrifugal pump is idling for a few seconds, when the centrifugal pump is idling, the impeller has no or little contact with the medium, so it cannot work effectively. If it cannot be sent out normally, these are all useless efforts.

Since there is no effective work, the load on the motor is very small, and the generated current is also very small. It will not have any effect on the motor. The idling of the pump is indeed fatal to the pump. The idling water pump is prone to cavitation, causing damage to the pump body and the overflow parts; the idling water pump in the form of mechanical seal or packing seal idling will not be lubricated by the liquid, resulting in dry grinding and rapid damage; the idling water pump rotor The components and pump body are hot, and there is no cooling of the liquid. Those small gaps (such as sealing rings) are easily bitten by the action of thermal expansion and cold contraction; the balance plate of the idling multistage centrifugal pump is not lubricated by liquid, and the balance plate will quickly Burned and damaged.