Multi-stage radial compressor unit comprising gas removal during a compressor stage

Patent metadata

Field	Value
Publication number	US-9976564-B2
Application number	US-201314386606-A
Country	US
Kind code	B2
Filing date	Feb 27, 2013
Priority date	Mar 20, 2012
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

A radial compressor unit for compressing gas has several compressor stages. Each compressor stage includes an impeller having rotor blades, and a flow channel arranged downstream of the impeller, as viewed in the flow direction of the gas to be compressed, having a diffusor section, a deflection section, and a recirculation section having guide blades. The gas compressed in a compressor stage can be removed as cooling gas for cooling a component to be cooled, and can be conveyed in the direction of the component to be cooled. The cooling gas can be removed adjacent to an intermediate wall of the compressor stage from the deflection section and/or the recirculation section of the flow channel of the compressor stage.

First claim

The invention claimed is:

1. A radial compressor unit for the compression of gas, comprising:
a plurality of compressor stages ( 11 , 12 , 13 ), each compressor stage ( 11 , 12 , 13 ) having:
an intermediate wall ( 32 ),
an impeller ( 18 ) with rotor blades ( 23 ),
a flow channel ( 24 ) arranged, with respect to a flow direction of the gas to be compressed, downstream of the impeller ( 18 ), the flow channel ( 24 ) having:
a diffuser section ( 25 ) directly following, in the flow direction, the impeller ( 18 ),
a deflection section ( 26 ) following, in the flow direction, the diffuser section ( 25 ), and
a recirculation section ( 27 ) with multiple guide blades ( 28 ), the recirculation section ( 27 ) following, in the flow direction, the deflection section ( 26 ), wherein the diffuser section ( 25 ), the deflection section ( 26 ) and the recirculation section ( 27 ) are bounded on the inside by the intermediate wall ( 32 ), and

a removal pipe ( 35 ) having a projecting section ( 37 ) projecting into the flow channel ( 24 ) and having, at an end of the projecting section ( 37 ) within a flow path of the flow channel ( 24 ), a removal opening ( 36 ) arranged in a region of the flow channel ( 24 ) proximate the deflection section ( 26 ) and adjacent to the intermediate wall ( 32 ), the removal pipe ( 35 ) and removal opening ( 36 ) being configured and arranged such that compressed gas, as cooling gas, is removed, by the removal pipe ( 35 ), from the flow channel ( 24 ), in a region of the flow channel ( 24 ) adjacent to the intermediate wall ( 32 ) so as to remove cooling gas from the region of the flow channel ( 24 ) at which the removal opening ( 36 ) is located.

Assignees

• Bueche Dirk
• Kleynhans George
• Mischo Bob
• Man Diesel & Turbo Se

Inventors

• Bueche Dirk
• Kleynhans George
• Mischo Bob

Classifications

• F04D17/122 Primary

  the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors · CPC title

• F04D25/16 Primary

  Combinations of two or more pumps {; Producing two or more separate gas flows} · CPC title

• F04D29/444

  Bladed diffusers · CPC title

• F04D29/5806

  Cooling the drive system · CPC title

• F04D17/12

  Multi-stage pumps · CPC title