Improving methods of increasing reliability without dam water intake

Bazarov, Dilshod; Norkulov, B.; Kurbanov, Azizali; Jamolov, F.; Jumabayeva, Gulnora

doi:10.1063/5.0113062

Cited by 16 publications

(10 citation statements)

References 17 publications

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“…The purpose of the tests is to analyze the change in the operating parameters of pumps over time, depending on the service life and technical condition, from improvements and upgrades made to the design [11,12]. The composition of the control tests includes the measurement and calculation of the following parameters: flow, pump head, electric motor power, cavitation reserve, pump, and unit efficiency [13,14].…”

Section: Fig 3 Installation Of Floating Seal At Water Intake Of Kmcmentioning

confidence: 99%

Practice of permanent presence and equipment of Karshi main canal

Glovatskiy,

Ergashev,

Kurbonov

et al. 2023

E3S Web of Conf.

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The research aims to develop new energy-saving modes of operation of the Karshi main canal with a cascade of pumping stations designed to irrigate the virgin lands of the Karshi steppe with water from the Amudarya River. The article discusses some calculation methods and control parametric tests of pumps by measuring the main parameters: flow, pump head, electric motor power, NPSH, and pump efficiency. Normal operation of pumping stations requires compliance with cavitation conditions of pumps of certain levels downstream. The authors have given recommendations on the use of a new floodwater design and obtained the flow's main characteristics in the section under consideration, taking into account the hydrometric characteristics. Further work continues to improve the scheme of water supply facilities by introducing new means of regulating the operation of pumping station elements into the scheme.

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Section: Fig 3 Installation Of Floating Seal At Water Intake Of Kmcmentioning

confidence: 99%

Practice of permanent presence and equipment of Karshi main canal

Glovatskiy,

Ergashev,

Kurbonov

et al. 2023

E3S Web of Conf.

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“…When the pump delivery changes by 15-20% from the optimal value, the wear rate increases by 40-80%. This is especially noticeable at large angles of installation of the impeller blades [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Study of operating mode of axial and centrifugal pumps with hydroabrasive wear of parts in flow section of pumping units

Uralov,

Eshev,

Shaazizov

et al. 2023

E3S Web of Conf.

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To date, a significant amount of work has been done to study the processes of cavitation and hydroabrasive wear in laboratory conditions. Using existing equations for assessing hydroabrasive or cavitation wear leads to certain inaccuracies since the action mechanism underlying them does not correspond to the actual operating conditions of hydraulic machines. Very little has been studied about the issues associated with joint and intense cavitation-abrasive wear, which always occur in fullscale hydraulic machines operating on natural watercourses with high turbidity. So far, the wear of the working bodies of centrifugal and axial pumps has been poorly studied, depending on the mode of their operation, and a methodology has not been developed for selecting operating modes, taking into account the wear of their parts. In this paper, the wear of parts of axial and centrifugal pumps in laboratory conditions is 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. In axial and centrifugal pumps, the most intense wear occurs at the outlet sections of the impeller blades and their sealing elements. When pumping muddy water for 2000 hours, the sealing gaps of type D pumps with a head of 75–80 m are 2.8– 3.1 mm. With an increase in the end clearance of the impeller of an axial pump from the impact of a slotted cavitation-abrasive flow, the pressure value and the local concentration of solid particles in the flow play a leading role.

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“…The issue of water distribution is currently being studied in terms of one-dimensional models, i.e., without considering the connection between the main channel and the water consumption points [1][2][3]. In some studies, water is considered a uniform flow in the main channel, and measurements are taken in the distribution channel [4,5]. In conclusion, the water measurement methods developed so far can only measure the amount of water in the channel they are placed in.…”

Section: Introductionmentioning

confidence: 99%