What Are The Main Methods For Centrifugal Pump Water Intake And Exhaust

Aug 29, 2025

The efficiency of centrifugal pumps is mainly affected by three types of efficiency: mechanical, volumetric, and hydraulic. Specifically, the main factors affecting the working efficiency of centrifugal pumps can be divided into the following categories:

 

The efficiency of the pump itself is the most fundamental impact. Under the same working conditions, the efficiency of pumps may differ by more than 15%.
2. The operating conditions of centrifugal pumps are lower than their rated conditions, resulting in low pump efficiency and high energy consumption.

3. The efficiency of the motor remains basically unchanged during operation. Therefore, choosing a high-efficiency motor is crucial.
The impact of mechanical efficiency is mainly related to design and manufacturing quality. After the pump is selected, the impact on later management is relatively small.
5. Hydraulic losses include hydraulic friction and local resistance losses. After running for a certain period of time, the pump inevitably causes surface wear on components such as impellers and guide vanes, increases hydraulic losses, and reduces hydraulic efficiency.
6. The volume loss of a pump, also known as leakage loss, includes three types of leakage losses: impeller sealing ring, inter stage, and axial force balancing mechanism. The level of volumetric efficiency is not only related to design and manufacturing, but also to post production management. After running continuously for a certain period of time, due to friction between various components, the clearance increases and the volumetric efficiency decreases.

7. Due to blockage of the filter cylinder, pipeline intake, and other reasons, the centrifugal pump may experience vacuum pumping and idling.
8. Before starting the pump, employees do not pay attention to the preparation work before starting the centrifugal pump. The basic operating procedures such as warm-up pump, disc pump, and infusion pump are not thoroughly executed, which often causes cavitation of the pump, resulting in high pump noise, vibration, and low pump efficiency.