AIRCRAFT ROTOR SYSTEM Russian patent published in 2024 - IPC F02C7/45 B64C27/82 B64C27/20 

FIELD: machine building.

SUBSTANCE: invention relates to rotor system (10) for aircraft (1), comprising propeller (20) configured to be driven and having a plurality of blades (21) located around axis of rotation (R) of propeller (20), substantially radially. Plane perpendicular to axis of rotation (R), which passes through blades (21) of the propeller in the radial direction, forms a plane (RA) of the propeller. Device also includes annular channel (30) of the screw, which surrounds screw (20) in a circle relative to the axis of rotation (R) and which limits air channel (40) of screw (20) passing in the axial direction of the axis of rotation (R). Annular channel (30) of the screw forms hollow structure (31) passing in a circumferential direction relative to the axis of rotation (R), and hollow structure (31) has on its circumferential surface (32) facing screw (20) in the radial direction, at least in its section, gas-permeable region (32a). Plane of the screw (RA) crosses the gas permeable region (32a). Hollow structure (31) is made so that acoustic waves of at least one frequency penetrating through area permeable for gas (32a) into hollow structure (31) are at least partially absorbed by hollow structure (31).

EFFECT: disclosed is a rotor system for an aircraft.

15 cl, 5 dwg