Back to results
US 4,523,896 AGranted
Centrifugal compressor
AssigneeCreusot-Loire
InventorsBernard Lhenry, Max Roustan
Life of this patent
Estimating the term…
Abstract
A centrifugal compressor capable of rotating at high speed by means of an electric motor comprises two compression stages cantilevered one at each end of a shaft, an electric motor of which the rotor is carried by a central part of the shaft, magnetic bearings, and a magnetic stop. The motor, the bearings and the stop are placed in a housing placed under a partial vacuum. Two facial gaskets adjustable as a result of longitudinal displacement of a component and of the shaft seal the compressor and ensure sealing of the space within the housing.
Claims4
A centrifugal compressor capable of rotating at high speed, comprising
- (a) a single shaft carrying at least two compressor wheels cantilevered on its two ends for setting in motion fluid to be compressed;
- (b) a high-speed electric motor comprising a rotor carried by said shaft and located in a central portion of said shaft;
- (c) at least two magnetic bearings for supporting said shaft;
- (d) a magnetic stop for adjusting the axial position of said shaft;
- (e) a housing surrounding at least said electric motor, said magnetic bearings and said magnetic stop;
- (f) at least one first facial sealing means located at one of said compressor wheels and adjustable as a result of axial displacement of said shaft by means of said magnetic stop;
- (g) at least one second facial sealing means located at the second compressor wheel and adjustable as a result of a controlled longitudinal displacement of a supporting component;
- and
- (h) circuit means for placing the space within said housing under a predetermined partial vacuum.
6 more elements
Dependencies are inferred from the claim text.