Method for assembly of tangential entry dovetailed bucket assemb

Details Method for assembly of tangential entry dovetailed bucket assemb Method for assembly of tangential entry dovetailed bucket assemb

1985-10-18

1987-10-27

Garrett, Robert E.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Blade received by continuous circumferential channel

416218, 291568R, 29447, F04D 2934

Patent

active

047026731

ABSTRACT:
A method for assembling a plurality of bucket assemblies having tangential entry dovetails onto a wheel of a turbomachine such that a predetermined circumferential force is obtainable on the bucket assemblies when assembled, includes reducing the distance between lateral faces on the base portion of at least a first bucket assembly and preferably all bucket assemblies, such as by cooling, and increasing the distance between the lateral faces after assembly, so that the predetermined circumferential force is obtained. Alternatively, the wheel circumference may be increased as by heating before the bucket assemblies are assembled. A combination of appropriate heating and cooling may be used. A closure piece having a predetermined circumferential expanse may be inserted in the bucket row of the wheel to obtain the desired circumferential force.

REFERENCES:
patent: 883891 (1908-04-01), Kieser
patent: 2036083 (1936-03-01), Robinson
patent: 2199243 (1940-04-01), Mortimer
patent: 2220918 (1940-11-01), Smith
patent: 2221685 (1940-11-01), Smith
patent: 2393447 (1946-01-01), Allen
patent: 2406703 (1946-08-01), Morris
patent: 2844355 (1958-07-01), Rankin
patent: 4157122 (1979-06-01), Morris
patent: 4270256 (1981-06-01), Ewing
patent: 4314396 (1982-02-01), Nunlist et al.

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