Method for assembling an impeller onto a turboshaft

Details Method for assembling an impeller onto a turboshaft Method for assembling an impeller onto a turboshaft

1982-05-05

1985-05-28

Garrett, Robert E.

Fluid reaction surfaces (i.e., impellers)

Support mounting, carrier or fairing structure

403259, 403282, 29432, 29520, F04D 2922, F16B 400

Patent

active

045197474

ABSTRACT:
An impeller is assembled onto a turboshaft such that the impeller is deformed at its end walls so as to deform the inner wall of the hole of the impeller against the shaft such that the clearance between the shaft and the hole of the impeller is reduced to zero, thereby, preventing bending or offsetting of the shaft relative to the impeller. For causing the deformation of the shaft, washers with a circular projection are disposed on both sides of the impeller, with the projection facing the end walls of the impeller. The washers and the impeller are clamped by a nut which is screwed to the threaded end of the shaft, resulting in the projection being forced into the end wall of the impeller, thereby deforming the impeller.

REFERENCES:
patent: 2486769 (1949-11-01), Watson, Jr.
patent: 3211362 (1965-10-01), Laskey et al.
patent: 3467419 (1969-09-01), Anderson et al.
patent: 4257744 (1981-03-01), Watson
IBM Technical Disclosure, "Double Clinch Lock Components for Ferrous to Nonferrous Assemblies", vol. 20, No. 5, (Oct. 1977).

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