The centrifugal pump is mainly composed of suction chamber, impeller, discharge chamber (volute), pump shaft, sealing packing, axial force balancing device and support.
Its working principle is that the motor drives the impeller to rotate at high speed through the pump shaft, so that the liquid is thrown to the outer edge of the impeller under the action of centrifugal force, and flows into the pressure water pipeline of the water pump through the flow channel of the volute, thereby realizing the liquid transportation. While the liquid is thrown to the impeller outlet, a low pressure is formed at the center of the impeller inlet. Under the action of this pressure difference, the liquid in the suction tank continuously enters the impeller through the suction pipeline and the suction chamber of the pump, forming a continuous liquid transportation process.
Practical application case
For example, the centrifugal pump of KSB in Germany is famous for its high efficiency, safety, reliability and long life. Its unique design concept includes a bubble test on the impeller of the first pump to measure the cavitation initiation value NPSHi to ensure that the main feed water pump will not cavitate under various working conditions. This design concept has been applied to the conventional island main feed water pump of the million-unit nuclear power plant, ensuring the high performance and reliability of the pump.
