BIROTARY SCREW-TYPE BLOWER

摘要

FIELD: engines and pumps. ^ SUBSTANCE: invention relates to aircraft engine production, particularly to blowers of aircraft gas turbine engines. Proposed screw-type blower comprises 1st and 2nd turbine wheels arranged one behind the other and furnished with vanes running in disks relative to radial axes. Front edges of the 1st turbine wheel vanes feature a departure from radial rotational axis increasing from the hub to periphery to create the vane sweep forward. 2nd turbine wheel vane front edges feature a departure from radial rotational axis decreasing from the hub to periphery to create the vane sweep forward. Birotary stew-type blower can be cowled. ^ EFFECT: reduced noise level. ^ 2 cl, 7 dwg