In order to improve the operation efficiency of centrifugal pump, reduce the energy consumption of equipment. By analyzing the factors that affect the efficiency of centrifugal pump group, a conclusion is drawn: the efficiency of centrifugal pump is the product of mechanical, volume and hydraulic efficiency. The efficiency of the pump group is the product of pump efficiency and motor efficiency. The main factors that cause low efficiency of centrifugal pump group are as follows. In order to improve the operation efficiency of centrifugal pump, reduce the energy consumption of equipment. By analyzing the factors affecting the efficiency of centrifugal pump group, a conclusion is drawn:
The efficiency of centrifugal pump is the product of mechanical, volumetric and hydraulic efficiency. The efficiency of the pump group is the product of pump efficiency and motor efficiency. The main factors that cause low efficiency of centrifugal pump group are as follows.
1. Motor efficiency remains basically unchanged in operation. Therefore, it is important to choose a high efficiency motor.
2, the efficiency of the pump itself is the most fundamental influence. Under the same working conditions of the pump, the efficiency may differ by more than 15%. 3. The volume loss of the pump is also known as the leakage loss, including three kinds of leakage losses of the impeller sealing ring, the interstage and the axial force balancing mechanism. Volume efficiency is not only related to design and manufacturing, but also related to late management. After the pump runs continuously for a certain time, the clearance increases and the volumetric efficiency decreases due to the friction between the components.
4. The operation condition of the centrifugal pump is lower than the rated condition of the pump, with low pump efficiency and high energy consumption.
5. The centrifugal pump is pumped and idled due to the blockage of the filter cylinder, pipeline intake and other reasons.
6. Hydraulic loss includes hydraulic friction and local resistance loss. After the pump runs for a certain time, it will inevitably cause surface wear of impeller and guide vane, increase hydraulic loss and reduce hydraulic efficiency.
7. Before the pump starts, the staff do not pay attention to the preparatory work before the start of the centrifugal pump, and the basic operation procedures of the warm pump, plate pump and perfusion pump are not thoroughly implemented, which often causes the cavitation phenomenon of the pump, resulting in large noise, large vibration and low pump efficiency.
8. The influence of mechanical efficiency is mainly related to the design and manufacturing quality. After the pump is selected, the late management has less impact.
