Bladed rotor assembly and method of forming same

Details Bladed rotor assembly and method of forming same Bladed rotor assembly and method of forming same

1982-08-16

1984-11-13

Marcus, Stephen

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Blade received by continuous circumferential channel

416216, 416218, 416220R, 416500, F01D 522, F01D 532

Patent

active

044822960

ABSTRACT:
The Assembly has a submerged root, turbine-wheel-blading configuration, and utilizes circumferentially oriented, buried, friction damping wires, and continuous, overlapping, tip shrouds to minimize vibratory response. The wires, in the presence of blade vibration, simultaneously rub on both the blades and surfaces of a recess in the wheel in which the blade roots are fixed. The continuous tip shrouding provides additional damping through shroud-to-shroud interface rubbing. The assembly has a stack of identical blades, obviating any need for relatively weak locking blades or pieces. The method defines the steps of forming a peripheral recess in a wheel, in which to secure root ends of blades, and setting the damping wires (or wire) therein prior to installing the blade root ends, and uniformly spacing-apart the blades after securing the same to the wheel.

REFERENCES:
patent: 2281318 (1942-04-01), Neufeld
patent: 2874932 (1959-02-01), Sorensen
patent: 2997274 (1961-08-01), Hanson
patent: 3076633 (1963-02-01), Bridle et al.
patent: 3279751 (1966-10-01), Ortolano
patent: 3367629 (1968-02-01), Partington
patent: 3393862 (1968-07-01), Harrison
patent: 4255086 (1981-03-01), Roberts

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