Wear issues of pumping units

Ishnazarov, Oybek; Isakov, Abdusaid; Islomov, Utkir; Xoliyorov, Umirzoq; Ochilov, Dilshod

doi:10.1051/e3sconf/202126404081

Cited by 12 publications

(8 citation statements)

References 9 publications

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“…The experiments were carried out at pump flows from 0.5ܳ ௫ to 1.25 ܳ ௫ with various materials and polymer coatings, which were applied to the surfaces of the blades made of steel -St. No.3. [8][9][10][11][12]. The procedure for applying a polymer coating to metal surfaces was as follows: ED-6 epoxy resin was applied to the surface of the blades with various fillers.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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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“…Considering also that the relative velocities of the suspension-carrying flow in the inter-blade channel and the slot gap are different, it can be reasonably argued that the wear of the end part occurs according to a different pattern than for the rest of the blade surface [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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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“…As is known, more than 10,000 pumping stations and 16,000 wells operate in the Republic of Uzbekistan. Solar pumping is integrated into a solar irrigation system designed to specific local needs in order to compensate for this divergence [9,10]. The challenge for both designers and operators of solar irrigation systems is to harmonize the non-constant solar energy and the constant irrigation requirements.…”

Section: Introductionmentioning

confidence: 99%

Experience of using solar energy in water lifting systems: A case study of Uzbekistan

Mirzabaev

Isakov²,

Mirzaev³

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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This article discusses modern schemes of using solar energy in the systems of the Ministry of Water Management. The analysis of electricity generation by photovoltaic water-lifting stations by months has been carried out and the effectiveness of their use as a reliable source of power supply to pumps has been proved. The payback period of solar water lifting systems is calculated. Calculations show that the payback period for solar water-lifting systems, considering only the cost of saved natural gas and carbon dioxide emissions is no more than 6 years. It should be noted that the life of the PVP is more than 20 years. Tax breaks on property and land use, provided for by the legislation of the Republic of Uzbekistan, further shorten the payback period.

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Wear issues of pumping units

Cited by 12 publications

References 9 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

Experience of using solar energy in water lifting systems: A case study of Uzbekistan

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