US 6,616,421 B2 · Direct drive compressor assembly

Abstract

A centrifugal compressor assembly, especially one having two or more stages, comprises a first compressor casing having. A fluid inlet and a fluid outlet and a first impeller rotatable within the first compressor casing. The assembly further comprises a second compressor casing having a fluid inlet and a fluid outlet and a second impeller rotatable within the second compressor casing. Drive for the compressors is provided by an electric motor, preferably a permanent magnet motor, disposed between the first and second compressor casings and comprising a stator and a rotor rotatable within the stator. A drive shaft is provided, wherein the first impeller, second impeller and the rotor are mounted on the drive shaft and rotatable therewith.

Claims11

Dependent claims

A compressor assembly, for compressing a fluid, which fluid consists essentially of a gas, said compressor assembly comprising:

a compressor having a compressor casing comprising a fluid inlet and a fluid outlet;
an impeller rotatable within the compressor casing;
a permanent magnet electric motor;
a rotatable drive shaft assembly extending from the electric motor into the compressor casing;
the impeller being mounted on the drive shaft assembly and rotatable therewith within the compressor casing;
and
the electric motor comprising a stator and a rotor, the rotor being mounted on the drive shaft assembly and rotatable therewith;
in operation, the permanent magnet electric motor and the impeller rotating at a speed of 25,000 rpm and higher.

5 more elements

Dependencies are inferred from the claim text.

Direct drive compressor assembly

Life of this patent

Direct drive compressor assembly

Life of this patent

Abstract

Claims11