What are the hazards of idling self-balancing centrifugal pumps?
The idling of the self-balancing centrifugal pump will cause great damage to the water pump, which may cause cavitation or damage the mechanical seal. Let’s explore the causes and hazards of idling self-balancing centrifugal pumps with everyone today.
The reason for the idling of the self-balancing centrifugal pump
The inlet medium of the self-balancing centrifugal pump is insufficient or the inlet pressure is insufficient, or the water inlet pipe of the water pump is blocked, or the air in the water pump cavity is not exhausted.
The hazards of idling self-balancing centrifugal pumps
'S influence on the self-balancing centrifugal pump mainly has the following aspects:
(1) Due to the large amount of gas in the idling water pump, it is easy to cause cavitation and damage the pump body and flow parts;
(2) The mechanical seal or packing seal has no liquid lubrication, and dry grinding is extremely easy to cause wear;
(3) The balance plate of the idling multi-stage centrifugal pump is not lubricated by anyone, and the balance plate will soon be burnt and damaged;
(4) The water pump is idling and there is no liquid, the rotor parts and the pump body will heat up, and the temperature cannot be cooled. Thermal expansion and contraction can easily cause some gaps (such as seal rings) to seize.
Self-balancing centrifugal pump early warning and maintenance
(1) Treat the various gap positions of the centrifugal pump and expand it under allowable conditions to prevent seizure;
(2) Special process treatment, quenching and tempering, heat treatment, etc. are carried out on the shaft of the centrifugal pump to increase the hardness, and use low-flexibility materials to prevent large swings and seizure during idling;
(3) Use mechanical seals and filler cavities that do not need to rely on liquid medium lubrication;
(4) Use enclosed self-lubricating bearings that do not require oil;
(5) Compared with other centrifugal pumps, the pump cavity of the horizontal self-priming centrifugal pump has an increased volume and has a place where water can be stored. Before the self-priming centrifugal pump works normally, the cavity must be filled with liquid. There is a period of self-priming before operation. During this period of time, air is continuously discharged to the outside of the pump. This period of time is partly idling;
(6) Set the idling induction system. The water pump is monitored in real time through modern equipment. When the centrifugal pump is idling, it will immediately alarm and stop automatically to protect the safety of the unit.
