Control of frequency and weight distribution in high...

Details Control of frequency and weight distribution in high... Control of frequency and weight distribution in high...

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 5/16 (2006.01) B23P 15/02 (2006.01) F01D 5/18 (2006.01)

Patent

CA 2047276

55,703 ABSTRACT OF THE DISCLOSURE A method for forming a long, low pressure rotating blade for a steam turbine and a blade formed thereby. The blade is formed in an airfoil configuration providing optimum blade width distribution from base to tip corresponding to a selected optimum steam passage efficiency. A hollow is formed within the blade beginning at the blade tip and extends toward the blade base. The hollow is centered with respect to the blade axis and has a cross-sectional area so as to maintain blade wall thickness within structural design limits while sufficient material from the blade is removed to maintain centrifugal stress loading within design limits.

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