E3S Web of Conf.
Volume 365, 2023IV International Scientific Conference “Construction Mechanics, Hydraulics and Water Resources Engineering” (CONMECHYDRO - 2022)
|Number of page(s)||7|
|Section||Hydraulics of Structures, Hydraulic Engineering and Land Reclamation Construction|
|Published online||30 January 2023|
Influence of hydroabrasive wear of impeller blades on head of centrifugal pump
1 "Tashkent Institute of Irrigation and Agricultural Mechanization Engineers" National Research University, Tashkent, Uzbekistan
2 Andijan Agricultural and Agrotechnological Institute, Andizhan, Uzbekistan
3 Tashkent institute of chemical technology, Tashkent, Uzbekistan
4 Shakhrisabz branch of the Tashkent institute of chemical technology, Shakhrisabz, Uzbekistan
5 Research Institute of Irrigation and Water Problems, Tashkent, 100187, Uzbekistan
* Corresponding author: firstname.lastname@example.org
The results of experiments on studying the nature of changes in the concentration and dispersion of solid suspended particles showed that the highest average monthly sediment concentration is 2.5...3.8 kg/m3, and sometimes in rainy weather, the maximum water turbidity reaches 7kg/m3. In the composition of solid mechanical impurities, a significant amount consists of particles with a grain size of 0.1-0.05mm. Observations have established that particles larger than 0.01 mm at a low flow velocity in the supply channel and the water intake chamber of the pumping station were easily deposited in them. Siltation volumes at various stations ranged from 20 to 60%. As a result, the hydraulic resistance increased, which led to a decrease in the pump head. The wear of parts of centrifugal pumps in natural conditions was also studied, and the dependences of wear on the characteristic dimensions and duration of their operation are given. The results of micrometering of the working parts of the pumps showed that the blades of the impellers along the length and width wear out unevenly both in size and shape. This is explained by the fact that when the hydroabrasive flow moves in the interblade space, the kinetic energy of solid particles and their local concentration increase due to an increase in the values of centrifugal and Coriolis forces along the radius of the impeller.
© The Authors, published by EDP Sciences, 2023
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