CIRCULAR FLOW CHANNEL FOR TURBO-MACHINES WITH MAIN FLOW RUNNING IN AXIAL DIRECTION, ALSO COMPRESSOR WITH SUCH FLOW CHANNEL Russian patent published in 2010 - IPC F04D27/02 F02C9/18 F01D5/14 

FIELD: machine building.

SUBSTANCE: circular flow channel (18) for turbo-machine, particularly for compressor, is arranged concentric around axis (2) of machine and is restricted with a round in cross section limiting wall (22, 24) for directing main flow (26). Limiting wall (22, 24) has multitude passes (46) of backflow distributed along circumference. Partial flow (49) is branched from the main flow (26) at point of outlet (50) and is directed back into main flow (26) at point of input (52) located downstream above point of outlet (50). Beam pens (32) of blades of a blade ring are arranged in flow channel (18). Vertexes (42) of the blade pens are placed opposite to limiting wall (22, 24) with a gap. Pens (32) of the working blades travel in specified direction (U) of rotation along circumference of limiting wall (24); or limiting wall (22) can travel in specified direction (U) of rotation relative to pins (32) of guiding blades of blade ring (41). Looked at in direction of rotation (U), point of output (50) of each pass (46) of the back flow is before corresponding point of input (52).

EFFECT: avoiding surges and stalls and increased efficiency of compressor.

17 cl, 4 dwg