Front-located shaft type tubular pump water inlet flow passage with excellent hydraulic performance and application method thereof

Abstract

The invention discloses a front-located shaft type tubular pump water inlet flow passage with excellent hydraulic performance and an application method thereof and belongs to the technical field of pump stations of water conservancy projects. The front-located shaft type tubular pump water inlet flow passage is divided into a linear inlet segment, a shaft flow passage segment, a through confluence segment and a round table rectifying segment along the water flow direction, and each segment has different geometrical characteristics; the shaft flow passage segment, through confluence segment and round table rectifying segment are complex in geometrical shape, and the shaft flow passage segment, through confluence segment and round table rectifying segment provide detailed section location drawings and section data lists; all sizes of the front-located shaft type tubular pump water inlet flow passage are represented by relative values, and the actually needed size of the pump station water inlet flow passage is obtained through multiplying the relative values by the diameter of a tubular pump impeller to be used for the pump station; parameters of the linear inlet segment can be regulated in a certain range according to the actual demands of the pump station so as to adapt to actual demands of different pump stations for such main geometrical parameters as flow passage length and width. The front-located shaft type tubular pump water inlet flow passage is significant for guaranteeing the safe, stable and effective running of the pump station.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering pumping stations, and in particular relates to a front-shaft type tubular pump inlet channel with excellent hydraulic performance and an application method thereof, which is mainly used to guide engineers and technicians in designing a front-shaft type tubular pump with excellent hydraulic performance. Flow pump inlet channel to ensure its design quality. Background technique [0002] The pre-shaft type tubular pump device has the advantages of smooth water flow and small hydraulic loss in the flow channel. It is suitable for large pumping stations with extra low head (less than 3m) to solve the problem that the efficiency of low head pump devices is difficult to improve. This type of pump device is equipped with a shaft made of reinforced concrete in the water inlet channel, and the power machine, bearings, gear box and other equipment are installed in the shaft. Compared wi...

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Problems solved by technology

The three-dimensional shape of the inlet flow channel of the pre-shaft type tubular pump is complex, and it must meet the requirements of a sufficiently large space in the shaft and a smooth and uniform flow field in the flow channel. Usually, a complex CFD-based optimized hydraulic design method is required, and the design is difficult. Large, long design cycle

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