Cover of a turbomachine centrifugal compressor capable of being rigidly connected via the downstream side near to the upstream edge of same, and turbomachine comprising this cover

Patent metadata

Field	Value
Publication number	US-2016195099-A1
Application number	US-201414904880-A
Country	US
Kind code	A1
Filing date	Jul 17, 2014
Priority date	Jul 18, 2013
Publication date	Jul 7, 2016
Grant date	—

Abstract

A cover of a centrifugal compressor intended to be rigidly connected to a turbomachine housing, which includes a plurality of ports, is provided. The cover further includes a fastening device for fastening the cover to the housing. A portion of the fastening device is located upstream relative to the ports and can be accessed by a fastening tool through at least one of the ports of the cover. A turbomachine uses this cover to form a sealed space, in particular with a view to collecting air.

First claim

1 : A cover for a centrifugal compressor which is intended to be fixed to a casing of a turbine engine, comprising an upstream edge and a downstream edge in the flow direction of the gases crossing the compressor, said cover comprising a plurality of openings and means for fixing to the casing,
wherein the upstream fixing means are located upstream relative to the openings and can be accessed by a fixing tool through at least one of said openings in the cover.

2 : The centrifugal compressor cover according to claim 1 , wherein said openings are intended for an air offtake in the compressor.

3 : The centrifugal compressor cover according to claim 1 , wherein said upstream fixing means comprise an outer flange and fixing holes which pierce said flange, the unit being intended to cooperate with clamping means, of the screw and nut type, which can be actuated by the fixing tool.

4 : The centrifugal compressor cover according to claim 3 , wherein said outer flange forms a wall which completely surrounds said cover.

5 : The centrifugal compressor cover according to claim 4 , configured such that each fixing hole can receive one clamping screw passing through at least one of said openings.

6 : The centrifugal compressor cover according to claim 3 , wherein said flange extends close to the upstream edge of the cover.

7 : The centrifugal compressor cover according to claim 3 , further comprising a downstream flange for holding against the casing of the turbine engine, which flange is fastened to the outer wall of the cover between said openings and the downstream edge and forms a sealing means.

8 : A turbine engine comprising a centrifugal compressor having a cover according to claim 3 , the casing of which is arranged so as to form a sealed connection with the upstream flange of the cover when the clamping means are clamped.

9 : The turbine engine according to claim 8 , the casing of which is arranged so as to form, together with said cover, at least one closed space which recovers the air passing through the openings in the cover.

10 : The turbine engine according to claim 9 , wherein at least some of the openings in the cover, and said air recovery space, are designed to participate in an air offtake system.

Assignees

• Snecma

Inventors

• Bromann Alain Marc Lucien
• Benderradji Kamel
• Reichert Pamela Dominique Daniele

Classifications

• F04D29/4206 Primary

  especially adapted for elastic fluid pumps · CPC title

• F04D17/10

  for compressing or evacuating · CPC title

• F04D27/002 Primary

  by varying geometry within the pumps, e.g. by adjusting vanes · CPC title

• F04D29/622

  Adjusting the clearances between rotary and stationary parts · CPC title

• F01D25/243

  Flange connections; Bolting arrangements (F01D25/265 takes precedence) · CPC title