Abstract
Under the background of energy-saving priority and efficient use of energy, centrifugal pump, as a kind of energy conversion equipment in modern industry and agriculture with liquid as the medium, plays an important role in many occasions. Optimization of performance parameters of centrifugal pump can improve efficiency and save energy. Important parameters include the number of blades and structural optimization of blade tail, etc. These parameters are often selected according to experience in actual production, which lacks accuracy and persuasiveness. The influence of different blade numbers and structural designs on cavitation performance and efficiency of the pump is studied, and the characteristic curve of the pump is drawn. The blade performance is evaluated comprehensively according to the pressure distribution, flow condition, cavitation degree and velocity diagram under different blade numbers, and the conclusion is drawn. The efficiency of the four-blade pump is 6.96% higher than that of the original six-blade pump, 1.96% higher than that of the three-blade pump, and 5.11% higher than that of the five-blade pump. The optimization results are obvious, which provides reference for the determination and setting of the number of centrifugal pumps.
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