Continuous harmonic shrouding

Details Continuous harmonic shrouding Continuous harmonic shrouding

1980-06-30

1983-06-07

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Axially extending shroud ring or casing

416191, 416196R, F01D 522

Patent

active

043868878

ABSTRACT:
An improved blade rotor structure for an axial flow turbine substantially reduces vibratory stress at resonant frequencies by rigidly connecting the blades to each other in groups equal in number to an integer multiple of the resonant frequency of the blades (i.e. a harmonic frequency) divided by the rotor running speed. Flexible tie means are used for connecting adjacent groups of blades together for substantially reducing axial-torsional vibration of the blades.

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patent: 3986792 (1976-10-01), Warner
Westinghouse Engineering Report SVE-BP03, Feb., 1972, Saunders et al.

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