Hydraulic design method of radial guide blade of diagonal flow pump

Abstract

The invention relates to a hydraulic design method of a radial guide blade of a diagonal flow pump. The method gives design formulas of main geometric parameters of the guide blade; and the main geometric parameters include a base circle diameter D3 of the guide blade of the diagonal flow pump, an inlet width (axial width) b3 of the guide blade, an inlet shaft surface speed vm3 of the guide blade, an exclusion coefficient omega 3, an inlet peripheral composite velocity vu3 of the guide blade, an inlet blade width coefficient KDBY of the guide blade, an inlet blade width b3' of the guide blade, a front cover plate round angle radius RDBY of the guide blade, a front cover plate round angle radius coefficient KTSY of the guide blade, a back cover plate round angle radius RTSY of the guide blade, an inlet liquid flowing angle alpha 3' of the guide blade, an inlet placing angle alpha 3 of the guide blade, a blade thickness delta 3 of the guide blade, a throat coefficient a 3 of the guide blade, a blade number z of the guide blade, a throat speed v3, a dispersion section outlet speed v4, an outlet diameter D4 of the guide blade, a dispersion angle phi, a dispersion section inlet area F3, a dispersion section outlet area F4 and the like. The method is different from a hydraulic design method of a radial guide blade of a common pump, improves the flowing conditions, and achieves the purposes of improving diversion and energy conversion.

Description

technical field [0001] The invention relates to a hydraulic design method of a radial guide vane of a diagonal flow pump. The radial guide vane of the oblique flow pump is widely used in agricultural drainage, municipal water supply and drainage, electric power, petroleum, chemical industry and other industries. It is a key component in the fields of circulating water supply, process water supply and regional water transfer in related industries. Ye's diagonal flow pumps are used in nuclear power, ship water jet propulsion and other industries. Background technique [0002] Diagonal flow pump is also called guide vane mixed flow pump. It has the characteristics of small footprint, small outer diameter, easy start-up and high efficiency. It is a water pump whose performance and structure are between the centrifugal pump and the axial flow pump. It overcomes the shortcomings of both and has the advantages of both. It is an ideal pump type with great development potential. At...

AI Technical Summary

Problems solved by technology

Due to the particularity of the pump casing of the oblique flow pump, the function of the guide vane connecting the impeller and the pump casing is particularly important, and the design method of the guide vane of the ordinary pump cannot be copied.

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