Abstract
In this paper, the performance of A1515 centrifugal pump was studied on a high parameters and precision large general test platform in combination with the Huang-jin-xia hydro-junction in Hanjiang-to-Weihe River valley water diversion project. The efficiency characteristics and cavitation performance of the pump were tested and measured respectively. All measured parameters were collected and recorded through the acquisition system. The experimental results show that the optimal efficiency and weighted average efficiency of the pump is 92.46% and 92.18%, and the design point efficiency is 92.39%, all of which meet the design requirements. After conversion to the prototype pump, the efficiency value at each working point is higher than the guaranteed value. The pump hump margin is 3.03%, which is greater than 2% of the required value and meets the requirements. In the whole normal operating range, the cavitation performance of the model pump meets the design and test requirements. The comprehensive error of model test is less than ±0.2%. The research results provide reference for the design of large centrifugal pump.
Highlights
Centrifugal pump is widely used in industrial production because of its advantages of high head
Because the large pump technology is not mature interiorly, there is no relevant data reference, it is necessary to research the pump by model experiment[1].The energy and efficiency performance of centrifugal pump unit is related to the degree of energy consumption, and affects the safety of pump unit
Zhao et al.[6] studied the pressure pulsation law and the change law of cavitation volume in a low specific speed centrifugal pump during cavitation, the results showed that the bubble volume increased non-linearly in the cavitation process
Summary
Centrifugal pump is widely used in industrial production because of its advantages of high head. Zhao et al.[6] studied the pressure pulsation law and the change law of cavitation volume in a low specific speed centrifugal pump during cavitation, the results showed that the bubble volume increased non-linearly in the cavitation process. Luo et al.[7] studied the characteristics of the centrifugal pump's transient speed under different conditions by experiments. Zhao[9] studied the positive and negative problems of cavitation control by placing obstacles on the blade surface of a centrifugal pump through experiments and numerical simulation. The cavitation performance of pump is studied by visualization, and the energy and efficiency characteristics of pump under different speed and flow conditions was carried out, the characteristic curve of the pump was drawn, the cavitation performance of pump with different cavitation numbers was analysed
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