FIELD: ventilation.
SUBSTANCE: axial tunnel-type blower-propulsor comprises drive, device (3) reversing coaxial shafts, central shaft (10) arranged inside hollow coaxial shaft (8) with inlet reverse-screw (12). Central shaft has a number of spaced apart central impellers with blade-type reverse screws (13) arranged between them with no support by central shaft. Aforesaid reverse-screws (13) are interjointed, coupled with inlet reverse-screw and outlet reverse-screw (16) running in bearing (17) of central shaft. It is also coupled with tunnel tube (18) whereto attached are all blades (21) deflected towards rotation of tunnel tube in the area of air inflow openings (19).
EFFECT: expanded operating performances.
4 cl, 3 dwg
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