PROPELLER BLADE WITH CONTROLLED GEOMETRY OF PROFILE Russian patent published in 2019 - IPC B64C27/615 B64C13/50 H02N2/10 

FIELD: aviation.

SUBSTANCE: invention relates to aircraft engineering. Airscrew blade with controlled profile geometry comprises aerodynamic profile with front part and movable flap interconnected by fastener. Movable flap consists of a bearing element, an upper and lower lining, a protective flexible resilient coating forming an outer contour of the blade flap profile, a piezoelectric actuator. Fastening device includes piezoelectric actuator, which contains piezoelectric element and electrodes, and carrying cylindrical axis. Piezoelectric actuator is made in the form of hollow cylinder with possibility of rotation as a result of piezoelectric effect of external surface relative to inner cylindrical surface. Surface of bearing cylindrical axis is attached to inner cylindrical surface of piezoelectric actuator, axle ends are fixed on front part of blade profile. On external cylindrical surface of piezoelectric actuator flap bearing element is fixed. Between flap bearing element and front part of blade profile there is a gap providing unimpeded rotation of flap bearing element relative to front part of blade profile.

EFFECT: invention is aimed at increasing working range of controlled displacements and turning angles of blade flap.

7 cl, 1 dwg