Impeller and shaft coupling

Details Impeller and shaft coupling Impeller and shaft coupling

1997-03-24

1999-03-16

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Turbo machine

4152181, 4152161, 403334, F04D 2934

Patent

active

058821783

ABSTRACT:
An improved compressor shaft and impeller for an overhung centrifugal compressor are disclosed that enable the hydraulic attachment and release of the impeller and shaft. The shaft and impeller are also keyed together to enhance their torsional load carrying ability. The impeller and shaft have mating tapered turns that provide precision alignment and mating keyed turns axially adjacent to the mating tapered turns that are mechanically coupled, typically by a removable key. The shaft has a hydraulic passageway that connects to the tapered interface between the shaft and the impeller. By providing hydraulic pressure to this passageway, the tapered surfaces can be forced apart to more easily remove the impeller. An annular piston is disposed between the shaft and the impeller that also communicates with the hydraulic passageway. Hydraulic fluid acting on the piston forces the impeller and the shaft apart in an axial direction.

REFERENCES:
patent: 2892503 (1959-06-01), Hood Jr. et al.
patent: 3019039 (1962-01-01), Clavell
patent: 3612719 (1971-10-01), Nomura
patent: 3715176 (1973-02-01), Kerklo
patent: 4788740 (1988-12-01), Sovis
patent: 5188478 (1993-02-01), Bitsch et al.

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