Annular casing for a turbine engine compressor
AssigneeSnecma
InventorAude Abadie
Life of this patent
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Abstract
A metal annular casing (16) for a turbine engine compressor, the casing having at least one annular row of radial chimneys for receiving outer cylindrical pivots of variable-pitch vanes, together with an outer cylindrical centering track (28) that is continuous or interrupted and against which runners carried by an annular ring for controlling the pitch of the vanes are to come to bear, the casing being characterized in that the track is formed by blocks (30) of plastics material fitted onto the casing and that are fastened or held on the casing.
Claims9
A metal annular casing for a turbine engine compressor, the casing having at least one annular row of radial chimneys for receiving outer cylindrical pivots of variable-pitch vanes, together with an outer cylindrical centering track that is continuous or interrupted and against which runners carried by an annular ring for controlling the pitch of the vanes are to come to bear, wherein the track is formed by blocks of plastics material fitted onto the casing and in that the casing includes means for retaining the blocks axially, these retaining means comprising one or two annular walls that are formed integrally with the casing and that extend radially outwards upstream and/or downstream relative to the blocks.
Dependencies are inferred from the claim text.