Rotor free of flapping hinges and free of lead-lag hinges
AssigneeMesserschmitt-Boelkow-Blohm GmbH
InventorEmil Weiland
Life of this patent
Estimating the term…
Abstract
The present rotor for rotary wing aircraft is of the type which is free of flapping hinges as well as free of lead-lag hinges. Such rotor shall have a simple structure and a small structural weight while simultaneously having a high operational reliability. To this end the rotor hub comprises upper and lower support or carrier plates made of a fiber compound material arranged in such a manner that the fibers extend substantially radially. The upper and lower support plates are spaced from each other by thrust arms or lands and the blade angle bearings are supported between the carrier plates of a fiber compound material.
Claims15
A rotor free of flapping hinges and free of lead-lag hinges for rotary wing aircraft, comprising rotor blades, carrier bar means operatively interconnecting said rotor blades, substantially rigid rotor hub means and radially outer blade angle bearing means (10) as well as radially inner blade angle bearing means (12) operatively connecting said carrier bar means to said substantially rigid rotor hub means, tension resistant connecting means operatively arranged between the carrier bar means for compensating centrifugal forces effective on the carrier bar means, said substantially rigid rotor hub means comprising upper disc shaped support plate means (4) and lower disc shaped support plate means (6) made of fiber compound materials wherein the fibers extend substantially radially relative to the rotational axis of the rotor, and shear resistant strut means (46, 58, 60) arranged to operatively space said upper and lower disc shaped support plate means (4, 6) from each other, said radially outer and inner blade angle bearing means (10, 12) being supported between said disc shaped support plate means (4,6).
Dependencies are inferred from the claim text.