A guide vane design method for nuclear main pump symmetrical non-uniform distribution guide vane structure

Abstract

The invention discloses a nuclear main pump symmetric non-uniform distribution guide vane structure and a guide vane design method. The structure comprises a reference guide vane blade and 14 guide vane blades, and the shape of each guide vane blade is the same as that of the reference guide vane blade. The tail edge of the reference guide vane blade is on the center axis of a pumping chamber, andthe 14 guide vane blades are distributed symmetrically about the center axis of the pumping chamber. By taking the reference guide vane blade as the starting point and the last guide vane blade as the terminal point, in the clockwise direction, the central angles of arcs, cut on the circumference of the outlet end of a guide vane wheel disc, of the tail edges of adjacent guide vanes are 17 degrees, 17.9711 degrees, 19.3307 degrees, 21.2342 degrees, 23.8990 degrees, 27.6297 degrees, 32.8527 degrees, 40.1650 degrees, 32.8527 degrees, 27.6297 degrees, 23.8990 degrees, 21.2342 degrees, 19.3307 degrees and 17.9711 degrees correspondingly, and the guide vanes are symmetrically and non-uniformly distributed on the two sides of the center axis of the pumping chamber. According to the nuclear mainpump symmetric non-uniform distribution guide vane structure and the guide vane design method, flowing in a nuclear main pump conforms to the shape characteristic and the flowing rule of the nuclearmain pump better by adjusting the through flow area of the guide vanes, flowing losses in the nuclear main pump are reduced, and the aims of improving the performance characteristic of the nuclear main pump and reducing the pressure pulsation strength are achieved.

Description

technical field [0001] The invention relates to the technical field of nuclear power and impeller machinery, in particular to a guide vane design method for a nuclear main pump with a symmetrical non-uniform distribution guide vane structure. Background technique [0002] my country has not yet safely mastered the development technology of the third-generation PWR main pump, and the nuclear main pump has become the most difficult equipment for large-scale third-generation advanced PWR nuclear power plants to be localized. In order to step into the international market and avoid the restriction of the transfer contract, we need to independently develop a commercial high-power nuclear main pump that meets the power cycle requirements of the primary circuit of the nuclear island. [0003] The current staged experimental results of the domestic nuclear main pump test base show that the pressure pulsation intensity of the nuclear main pump test piece is relatively large, which is...

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Problems solved by technology

[0004] The third-generation nuclear main pump AP1000 developed in the United States and the CAP1400 nuclear main pump under development in China all adopt the uniformly distributed traditional guide vane structure 3 (such as figure 1 shown), and the nuclear main pump is an incomplete circumferential symmetric structure as a whole. Previous designers often ignored this detail in the guide vane design process. Considering the structure design of the new nuclear main pump guide vane relatively rare

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