MULTI-CIRCUIT PROPELLER BLADE Russian patent published in 2022 - IPC B64C27/473 B64C11/26 B64C11/24 

FIELD: aviation.

SUBSTANCE: invention relates to aircraft engineering and can be used in designs of propellers of aircraft, fans, rotors of wind-driven power plants. Propeller blade includes root part, aerodynamically shaped blade airfoil parts — transition, standard and tip, centering weights, trimmer, fairings, attachment assembly, high-strength shell from fibrous polymer composite materials. Shell consists of an external package, internal packages and reinforcing elements. Shell is made in the form of a metal-composite multi-circuit integral structure with a power operating wide metal forging, which is installed along the entire length of the nose part of the blade to the root sections. Forging is connected with high-strength composite shell, having different geometry of shapes and sizes of inner cavities of contours along length and width of blade, in which fillers are installed in the nose part, including centering weights, and the middle and tail contours are hollow.

EFFECT: providing stability of geometrical and elastic-mass characteristics, high static and fatigue strength, survivability, low level of loads and vibrations, poultry resistance, moisture resistance, lightning protection.

15 cl, 10 dwg