ROTOR ASSEMBLY WITH TWO COAXIAL COUNTER-ROTATING PROPELLERS WITH VARIABLE STEP FOR AIRCRAFT ENGINES

摘要

The invention relates to a rotor with two variable pitch propellers (1) and (2) counter-rotating and coaxial on their respective shaft (3) and (4) rotating in opposite directions on the fixed shaft (5), which in the extension of the motor shaft (19) comprises for this purpose on a diametrical axis a pair of bevel gears (10) for the motorization of this device. The collective pitch control on their blades comprises the rods (15), the driver (18), the sliding plates (6) (6 ') and (7) in connection with the three connecting rods (16), all of this rotating in the same direction as the propeller (1), the pitch control of the propeller (2) then being done using the rods (14) articulated on the sliding and rotating plate (7 ') with its driver (17 ). Device according to the invention particularly intended for aircraft engines with counter-rotating propellers.