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- W2510188778 abstract "The subjects of examination are mine sectional centrifugal double-flow pumps. The main advantage of such pumps in comparison with the single-flow ones is a lack of hydraulic unloading device that allows unloading the axial forces of the pump. This entails increasing the number of indicators. It raises the question of the the features of creation of these pumps. One of the key requirements in the development of dual-flow pumps is providing identical conditions, favorable from the point of hydraulic view, for the fluid inlet on the first impellers of both groups of sections, and its exit from the last impellers, which implies a special attention to the structure of the this parts of the pump. Since the original version of the design involves the use of element base of single-flow pumps of centrifugal sectional pumps type and suction components of structure remain fairly perfect, consideration of the unique part of the dual stream pump, namely the decreasing space is the main purpose of the work. Authors consider in detail the process of transition of the liquid from the last impellers to the decreasing space (further liquid enters the conduit), since it has a great influence on the efficiency of the output portion and the whole pump. The relationship between the resistance of individual transfer channels and the average fluid velocity through them is shown. Through theoretical methods and transformation of formulas, we can derive the relative pressure losses in the transfer channels, which is a dimensionless quantity. They are defined only by the pump construction geometry and the velocity distribution in the channels and chambers of scapular outlets. The study results allow us to assume that the relative value of pressure losses in the base sample pump (originally produced) can be extended to the whole series of types of such pumps." @default.
- W2510188778 created "2016-09-16" @default.
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- W2510188778 date "2016-01-01" @default.
- W2510188778 modified "2023-09-26" @default.
- W2510188778 title "Особенности создания шахтных секционных двухпоточных насосов" @default.
- W2510188778 hasPublicationYear "2016" @default.
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