Airfoil structure of final stage moving blade for half speed nuclear power steam turbine

Abstract

The invention discloses an airfoil structure of the last-stage moving blade for a half-speed nuclear power steam turbine. The airfoil is formed by superimposing several characteristic sections according to specific rules. The characteristic sections have characteristic parameters such as installation angle c1, chord length b1, maximum thickness w1, Axial width Xa, cross-sectional area A; the superposition law is a continuous smooth transition from the root to the top along the blade height direction, and the relative value of the blade height H increases monotonously from 0.0 to 1.0. Correspondingly, the absolute value of the installation angle c1 is given by 81° decreases to 10.7°, the relative value of chord length b1 monotonically decreases from 1.76 to 1.0 from the root section to the top section, the relative value of the maximum thickness w1 monotonically decreases from 5.43 to 1.0 from the root section to the top section, and the relative value of the axial width Xa From the root section to the top section monotonically decreases from 8.86 to 1.0, and the relative value of the cross-sectional area A decreases monotonically from 8.7 to 1.0 from the root section to the top section.

Description

technical field [0001] The invention relates to a final-stage moving blade of a steam turbine, in particular to a blade body structure of a final-stage moving blade for a half-speed nuclear power steam turbine. Background technique [0002] As one of the clean energy sources, nuclear power has the characteristics of stably producing a large amount of electricity. It effectively addresses a series of environmental issues such as energy depletion, the global warming effect, and control of carbon dioxide emissions. [0003] In recent years, actively promoting the construction of nuclear power has become an important strategy in my country. It is necessary to meet the growing energy demand of economic and social development, ensure energy supply and safety, protect the environment, achieve my country's greenhouse gas control goals, and achieve the optimization and sustainability of the power industry structure. It is of great significance to continue to develop and enhance my cou...

AI Technical Summary

Problems solved by technology

However, these last-stage moving blades cannot match the design requirements of my country's mainstream nuclear power steam turbines, especially the above-mentioned three types of steam turbines, resulting in relatively low work efficiency and low cost performance of the steam turbines. This has made my country's nuclear power mainstream in the fierce market competition. Steam turbines are at a competitive disadvantage, which affects the pace of vigorous development and promotion, and is not conducive to going abroad

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