TURBOCOMPRESSOR RECIRCULATING DEVICE Russian patent published in 2007 - IPC F04D29/54 

FIELD: mechanical engineering; turbocompressors.

SUBSTANCE: proposed recirculating device for turbocompressor has ring chamber arranged in zone of free ends of blade rim and radially adjoining main through channel, and great number of guide elements arranged in ring chamber and distributed over its circumference. Possibility is provided for passing of flow in circumferential direction in front and/or rear parts of ring chamber, and guide elements are connected with at least one wall of ring chamber and, as to the rest, they cantilever of freely project into ring chamber. Heads of guide elements pointed to main through channel lie on and/or near line limiting its contour and are axially overlapped with free ends of blade or adjoin, in axial direction, zone in which free ends of blades are located.

EFFECT: increased level of threshold of surge, enlarged area of stable operation of turbocompressor without considerable reduction of its efficiency.

19 cl, 7 dwg