Method for extracting packets of blades from a steam turbine

Details Method for extracting packets of blades from a steam turbine Method for extracting packets of blades from a steam turbine

1989-05-03

1991-07-16

Rosenbaum, Mark

Metal working

Method of mechanical manufacture

Impeller making

294264, 294265, B23P 1904

Patent

active

050313118

ABSTRACT:
A method of extracting packets of blades (1) insertable radially into a disk (5) of a steam turbine rotor, for the purpose of being fixed therein. The flat situated above the feet of the blades are clamped and then pulled out radially. Apparatus for performing the method comprises two levers (15) hinged to each other such that moving the rear arms (18) apart causes the front arms (17) fitted with jaws (20) to clamp against the flats of the blades. Actuators (23) move the entire apparatus (14) radially away from the disk (5). The packets of blades (1) are extracted without being damaged and they may be reused after the disk (5) has been repaired.

REFERENCES:
patent: 2744312 (1956-05-01), Conger
patent: 4078290 (1978-03-01), Fletcher et al.
patent: 4141124 (1979-02-01), Ryan
patent: 4279068 (1981-07-01), Altmayer
patent: 4429857 (1984-02-01), Ferguson
patent: 4442593 (1984-04-01), Holmberg
patent: 4451959 (1984-06-01), Miller et al.
patent: 4455730 (1984-06-01), Guenther

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