Irrigation pumping stations according to the hydraulic and operational indicators of pumping units

Mamajanov, M.; Uralov, Bakhtiyor; Li, Marina; Qalqonov, Eshmatboy; Nurmatov, Panji; Gayur, Abdulatif

doi:10.1051/e3sconf/202126403074

Cited by 11 publications

(8 citation statements)

References 26 publications

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“…The dependences of the wear of the impeller blades on the concentration and fineness of sediments, as well as the duration of the centrifugal pump operation presented in Figures 1, 2, and 3, confirm the results obtained in [1][2][3][4][5][6][7]. Methodical studies of the influence of the concentration and size of solid particles, as well as the duration of the impact of the hydroabrasive flow on the wear rate of the elements of the flow path of a centrifugal pump, confirm the validity of the physical model.…”

Section: Introductionsupporting

confidence: 85%

Influence of hydroabrasive wear of impeller blades on head of centrifugal pump

Uralov

Mutalov²,

Shakirov

et al. 2023

E3S Web of Conf.

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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.

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Section: Introductionsupporting

confidence: 85%

Influence of hydroabrasive wear of impeller blades on head of centrifugal pump

Uralov

Mutalov²,

Shakirov

et al. 2023

E3S Web of Conf.

Self Cite

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“…Using the main provisions given in [4][5][6], we will carry out a theoretical analysis of the mechanism of hydroabrasive wear, taking into account the following conditions: a) the fluid flow has a steady cavitation-free regime; b) all sediment particles are homogeneous and are suspended in the flow; c) the saturation of the flow with sediments is relatively small so that it does not change the nature and properties of the flow; g) the wear blade material has constant physical and mechanical properties and a homogeneous structure;…”

Section: Resultsmentioning

confidence: 99%

“…Using the method of dimensions, it was shown in [5,8] that the number of particles that come into contact with the surface with a characteristic size ‫ܦ‬ or ܵ is proportional to the ratio ‫ܦ/݀‬ or ݀/ܵ. Based on position:…”

Section: Resultsmentioning

confidence: 99%

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Theoretical models and dependences for calculating intensity of hydroabrasive wear of pump working parts

et al. 2023

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The paper presents the results of a theoretical and experimental study of the wear intensity of the elements of the flow part of centrifugal and axial pumps. Theoretical formulas recommended by various authors, obtained for models with flat samples based on energy theory, do not consider the features of hydraulic machines. Considering the movement of a solid particle in the interblade channels of the impellers of centrifugal and axial pumps, we chose design schemes that correspond to hydraulic and physical wear processes. The analysis shows that the action of centrifugal and inertial forces in the interblade channel of the impellers of centrifugal and axial pumps results in the separation and redistribution of solid particles in the flow. As a result, in centrifugal pumps at the end of the blade and axial pumps at the end gap of the impeller, the local concentration of solid particles increases compared to the average. The paper also provides dependencies for calculating the intensity of hydroabrasive wear of pump working parts.

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“…The main structures are calculated according to the formulas for open channels. Irrigation canals are objects with distributed parameters, which during operation, change both in time t  and distance s  [5,6].…”

Section: Resultsmentioning

confidence: 99%

Improvement of water distribution management methods for operating modes of machine channels

Glovatskiy,

Djumanazarova,

Saparov

et al. 2023

E3S Web of Conf.

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The ongoing research aims to improve the reliability of irrigation systems, improve methods for managing the water distribution of the operating modes of machine canals, and increase crop yields in the Nukus and Kegeyli regions of the Republic of Karakalpakstan. At present, increasing the efficiency of the operation of machine channels is associated with the development of energy and resource-saving technologies. Pumps that have been in operation for more than 25-30 years, due to physical and obsolescence, operate with low efficiency, emergencies associated with technological regimes with transients. The article analyzes changes in the processes of the hydrodynamics of control systems with optimization of sediment control on water supply structures, the danger of abrasive wear of the flow path of hydraulic units, and experimentally checks the mathematical model for managing the water distribution of operating modes. In this regard, the improvement of the design of elements and the modernization of individual units of pumping units will increase the efficiency of the entire system of machine water lifting. Recommendations are given on the inclusion of settling tanks in the composition of the head waterworks, carrying a large number of suspended sediments (more than 0.2–0.5 kg/m3) and systems for their purification.

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Irrigation pumping stations according to the hydraulic and operational indicators of pumping units

Cited by 11 publications

References 26 publications

Influence of hydroabrasive wear of impeller blades on head of centrifugal pump

Influence of hydroabrasive wear of impeller blades on head of centrifugal pump

Theoretical models and dependences for calculating intensity of hydroabrasive wear of pump working parts

Improvement of water distribution management methods for operating modes of machine channels

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