Pull-rod modularized guide vane type diagonal flow pump

Abstract

The invention relates to a high-flow and low-lift water pump used in medium-and large-scale water conservancy projects, and discloses a pull-rod modularized guide vane type diagonal flow pump. The diagonal flow pump comprises parts of square outer barrel and inlet pipe connecting sections, square outer barrels, pull rods, impeller blades, blade hubs, guide vane hubs, guide vane blades, streamlined ribbed plates, a pump shaft, guide vane body flanges, hydrocones, screws, press plates, oil seals, bend pipe sections, rolling bearings, mechanical seals, couplers and the likeother parts. The diagonal flow pump is characterized in that impeller casings and guide vane body outer walls are integrated to form the outer barrels, a cross section of each outer barrel adopts an square outside and round inside shape, the left sides of the outer barrels can be directly clamped in the connecting sections for positioning, so that fast butt joint is achieved, and the left sides require no fastening part; and moreover, the right sides of the outer barrels are connected and fixed with the guide vane body flanges and flanges on the left sides of the bend pipe sections through the pull rods and the nuts. Pull-rod connection is adopted, the guide vane bodies are connected with the outer barrels and the bend pipe sections, therefore, compared with a traditional diagonal flow pump, the pull-rod modularized guide vane type diagonal flow pump is more convenient to dismount and mount, facilitates maintenance and detection, and can be used for observing cavitation bubbles produced due to internal cavitation of the diagonal flow pump.

Description

Technical field [0001] The invention relates to a large-flow, low-lift pump type used in pumping stations of large and medium-sized water conservancy projects, in particular to the improvement of the traditional mixed-flow pump structure. Background technique [0002] Diagonal flow pump is a pump type with higher specific speed, and its performance and structure are between axial flow pumps and centrifugal pumps. It is mainly used for agricultural drainage and irrigation, municipal water supply and drainage, power plant circulating water supply, regional water transfer, etc. In recent years, it has been applied in nuclear power and ship water jet propulsion. The preferred pump type for the South-to-North Water Diversion Project is the diagonal flow pump. As we all know, the hydraulic performance of the centrifugal pump is good, but the structure is complex; although the axial flow pump has the advantages of simple structure, light weight, and small footprint, it has a narro...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of cumbersome processing, troublesome installation and disassembly, and inconvenient maintenance and testing in the traditional diagonal flow pump, the present invention provides a rod-type modular guide vane type diagonal flow pump, which is not only low in cost, but also And simple structure, easy to disassemble

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