Dynamic Characteristics Analysis and Control Technology of Centrifugal Pumps
The dynamic characteristics analysis and control technology of centrifugal pumps are the key to ensure the efficient and stable operation of the pump under complex working conditions. The following is a brief overview of the dynamic characteristics analysis and control technology of centrifugal pumps:
1. Dynamic characteristics analysis
Flow and pressure changes: During the operation of the centrifugal pump, its flow and pressure will fluctuate with the change of working conditions. This fluctuation not only affects the efficiency of the pump, but may also affect the stability of the system. Therefore, it is necessary to understand the flow and pressure change rules of the pump under different working conditions through dynamic characteristics analysis.
Vibration and noise: The radial force caused by pressure pulsation and uneven pressure in the impeller is the main cause of vibration in the centrifugal pump. Dynamic characteristics analysis also includes the study of pump vibration and noise characteristics to find out the vibration source and noise source, and take corresponding vibration and noise reduction measures.
Transient response: The water supply system has the characteristics of time-varying, time lag and nonlinearity, which makes the centrifugal pump have transient response when starting, stopping or changing working conditions. Dynamic characteristics analysis needs to pay attention to these transient processes to evaluate the pump's adaptability to dynamic changes in the system.
2. Control technology
Frequency control: Control the flow rate by changing the frequency of the centrifugal pump motor to achieve energy-saving, efficient and flexible flow regulation. Frequency control technology can automatically adjust the operating state of the pump according to actual needs and improve the overall efficiency of the system.
Intelligent control: Use intelligent algorithms to predict and control the operating state of the centrifugal pump. By collecting flow, pressure, vibration and other signals, an intelligent control system model is established to achieve high-precision flow control and vibration suppression.
Flow control: Based on the flow control concept, the centrifugal pump is modified and designed using advanced technologies such as three-dimensional gap drainage blade structure to improve the internal flow state of the pump and reduce the fluid excitation force, thereby suppressing vibration and noise.
