TURBOMACHINE CENTRIFUGAL COMPRESSOR COVER COVER ATTACHMENT METHOD, COMPRESSOR COVER OF IMPLEMENTATION AND COMPRESSOR ASSEMBLY PROVIDED WITH SUCH COVER

摘要

The present invention aims to allow centrifugal compressor cover displacement so that the clearance between the cover and the compressor wheel blades remains substantially constant and as low as possible. To do this, the invention proposes a type of attachment configuration in the middle of the lid having an elastically deformable portion. A cover has a concave envelope (50) having an inner face (51) arranged at a distance from the compressor (12) equipped with a wheel (22) provided with fins (20) by a fastener (8). The fastener (8) has a junction end (83) in the middle of the casing (50), and another end (82) fixed to a casing (6) of the turbomachine (1). The fastener (8) comprises an axially symmetrical diaphragm (80) of generally frusto-conical configuration having an arm profile (8b) coupled to the attachment end (82) to the casing (6) by a double-elbow joint (8c, 8d). , 8e) of right angles and obtuse at rest. The distance between the inner face (51) of the envelope (50) and the upper edges (21) of the fins (20) is able to be kept constant in operation with a minimum clearance setting.