The efficiency of the centrifugal pump is mainly affected by the mechanical, volume and hydraulic efficiency of the three, in particular, the main factors affecting the efficiency of centrifugal pumps can be divided into the following:
1. The efficiency of the pump itself is the most fundamental impact. The same working conditions of the pump, the efficiency may be a difference of more than 15%.
2. Centrifugal pump operating conditions lower than the rated pump conditions, low pump efficiency, high energy consumption.
3. Motor efficiency in the use of the basic remain unchanged. So it is important to choose a high efficiency motor.
4. The impact of mechanical efficiency is mainly related to design and manufacturing quality. After the pump is selected, the later management has less impact.
5. Hydraulic losses include hydraulic friction and local resistance losses. After the pump is running for a certain time, it will inevitably cause the surface of the impeller and guide vane to wear, the hydraulic loss increases and the hydraulic efficiency decreases.
6. Pump volume loss, also known as leakage losses, including impeller seal ring, interstage, axial force balance mechanism of three kinds of leakage losses. The level of volumetric efficiency is not only related to design and manufacturing, but also related to post-management. After the pump has been running for a certain period of time, the volume efficiency is reduced due to the friction between the components and the clearance.
7. Due to filter cylinder blockage, pipeline intake and other reasons caused by centrifugal pump evacuation and idling.
8. Before the pump starts, the staff does not pay attention to the preparation of the centrifugal pump before the start, the warm pump, disk pump, pouring pump and other basic operating procedures are not thoroughly implemented, often cause pump cavitation phenomenon, causing pump noise, vibration,