FIELD: engines and pumps.
SUBSTANCE: turbo machine compressor comprises case (4), at least one compressor stage and chambers (5) arranged to house vanes (1). Compressor stage is composed by fixed impeller (2) and running impeller (1) fitted at fixed impeller (2) outlet. Chambers (5) feature length L2 measured in axis and shifted towards inlet relative to running impeller (1) to make L1-long overlap. Lengths L1 and L2 make 35-50% and 80-90% of axial cord Cax measured at running impeller (1) outer end. Chambers (5) do not communicate. This eliminates whatever circular circulation, hence, risks of repeated parasitic feed at vane level tending to deteriorate compressor performances. Repeated feed is performed, solely, as far as possible nearby the vane clearance.
EFFECT: air better suction and repeated feed as far as possible nearby the inlet of vane clearance.
13 cl, 5 dwg
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