A kind of optimal design method of guide vane airfoil of axial flow pump

Abstract

The invention relates to an improvement of a traditional axial pump vane airfoil design method, and provides a novel axial pump vane airfoil optimizing design method. The method has the advantages that the strength of a vane is effectively improved, the service life of the vane is prolonged, the casting difficulty of the vane is reduced, the vane drawing time is greatly shortened, the labor is saved, and the hydraulic performance of the vane is ensured. The method is characterized in that the sharp parts at the inlet and outlet ends of the back surface of the vane airfoil are changed into the circular arc transition, and the parts near the inlet and outlet ends are properly thickened; the placing position of the vane is determined by using the profile placing angle to replace the vane inlet and outlet placing angle; the vane airfoil is designed according to the following main parameters, namely chord length l, working surface profile radius R1, back surface profile radius R2, vane inlet circular arc radius r1, vane outlet circular arc radius r2, and profile placing angle alpha L.

Description

technical field [0001] The invention belongs to the field of pump design and manufacture, and relates to the design of guide vanes of axial flow pumps, and is especially suitable for the optimal design of guide vane airfoils of axial flow pumps. Background technique [0002] Axial flow pumps are low-lift, high-flow pumps. The general performance range is: head 1-12m, flow 0.3-65m 3 / s, specific speed 500~1600. The design method of the guide vane can use the lift method, the integral method and the streamline method, but the streamline method is generally used. In the traditional design method, the inlet and outlet of the guide vane airfoil are sharper, and the thickness of the part near the inlet and outlet is also thinner, which reduces the strength of the guide vane on the one hand, reduces the service life of the guide vane, and on the other hand increases the difficulty of casting the guide vane . Contents of the invention [0003] In order to overcome the deficienc...

AI Technical Summary

Problems solved by technology

In the traditional design method, the inlet and outlet of the guide vane airfoil are sharper, and the thickness of the part near the inlet and outlet is also thinner, which reduces the strength of the guide vane on the one hand, reduces the service life of the guide vane, and on the other hand increases the difficulty of casting the guide vane

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