Ways to reduce hydraulic losses in multistage centrifugal pumping equipment for mining and oil-producing industries

Akanova, G; Sładkowski, Aleksander; Podbolotov, S; Kolga, Anatoly; Stolpovskikh, Ivan

doi:10.33271/nvngu/2021-6/077

Cited by 2 publications

(2 citation statements)

References 16 publications

(18 reference statements)

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“…Experiments carried out at a constant concentration with different fractions of particles d confirmed the linear dependence of the wear of the blades and the pump impeller chamber on the size of solid particles, which is the basis of equation (1). Dependence 𝛥𝐺 = 𝑓(𝑑) of a fixed streamlined part -straightening device -differs from linear [4][5][6][7]. Subsequently, all other experiments were carried out at constant values of T=5h, p=10 kg/m 3, and dср =0.34 mm.…”

Section: Introductionmentioning

confidence: 80%

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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Section: Introductionmentioning

confidence: 80%

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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show abstract

“…Concerning vane pumps used in irrigation systems, the task of establishing allowable wear is mainly technical and economic. Taking into account the leading role of the size of the sealing and end gaps of the impellers of centrifugal and axial pumps with a decrease in energy performance, we have proposed a method for determining their optimal overhaul life based on a technical and economic comparison of options for reduced costs [1][2][3][4][5][6]. The equation expresses the given costs associated with the maintenance and operation of pumps:…”

Section: Introductionmentioning

confidence: 99%

Method for determining optimal overhaul service of centrifugal and axial pumps

Uralov,

Eshev,

Khakimova

et al. 2023

E3S Web of Conf.

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The efficiency of pump operation mainly depends on the maximum permissible wear of the parts of their flow path. One of the factors determining the need for repair and restoration of centrifugal and axial pumps is the wear of parts that form the sealing and slotted gaps of the impellers. With an increase in the design clearances of the impellers, the leakage of liquid increases proportionally, and this worsens the energy performance of the pumps and, accordingly, leads to an increase in operating costs. At certain clearance values, the costs reach such a value that the pump operation becomes impractical. Therefore, when assessing the pump's performance, it is important to establish the wear limits of its parts. About a machine part, the limit state is a state in which its further operation is impossible due to an unrecoverable decrease in operating efficiency below the permissible level or the need for repair.

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Ways to reduce hydraulic losses in multistage centrifugal pumping equipment for mining and oil-producing industries

Cited by 2 publications

References 16 publications

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

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

Method for determining optimal overhaul service of centrifugal and axial pumps

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