CF bearing with steady pitching moment
First Claim
Patent Images
1. A centrifugal force bearing for a rotor hub, the centrifugal force bearing comprising:
- a mounting means adapted for attachment to a yoke;
a grip interface means adapted for pitch rotation with a blade grip and for receiving centrifugal compression forces from the grip; and
a pitching moment means connected to the mounting means and the grip interface means, the pitching moment means being configured to exert a pitching moment when the pitching moment means is compressed by the centrifugal compression forces.
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Accused Products
Abstract
A centrifugal force bearing having a means for providing a steady pitching moment is disclosed. The centrifugal force bearing may optionally comprise a coning means. A rotor system having the centrifugal force bearing is disclosed. A rotary-wing aircraft having the centrifugal force bearing is disclosed.
25 Citations
23 Claims
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1. A centrifugal force bearing for a rotor hub, the centrifugal force bearing comprising:
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a mounting means adapted for attachment to a yoke; a grip interface means adapted for pitch rotation with a blade grip and for receiving centrifugal compression forces from the grip; and a pitching moment means connected to the mounting means and the grip interface means, the pitching moment means being configured to exert a pitching moment when the pitching moment means is compressed by the centrifugal compression forces. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A centrifugal force bearing for a rotor hub, the centrifugal force bearing comprising:
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a first end portion adapted for rigid connection to a yoke; a second end portion opposing the first end portion, the second end portion being adapted to pivot with a blade grip and adapted to receive centrifugal compression forces from the grip generally along a longitudinal bearing axis, and the second end portion being configured to rotate about the longitudinal bearing axis with respect to the first end portion; a plurality of stacked shims carried between the first end portion and the second end portion; and at least one insert carried between adjacent shims; wherein the shims and inserts cooperate to generate a pitching moment about the longitudinal bearing axis when the centrifugal compression forces cause displacement of the second end portion toward the first end portion. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A rotary-wing aircraft having at least one rotor, the rotor comprising:
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a yoke; at least two blades associated with the yoke; at least one blade grip for connecting the blades to the yoke; and a centrifugal force bearing, comprising; a mounting means adapted for attachment to the yoke; a grip interface means adapted for rotation with one of the grips and for receiving centrifugal compression forces from the grip; and a pitching moment means connected to the mounting means and the grip interface means, the pitching moment means being configured to exert a pitching moment on the associated grip when the pitching moment means is compressed by the centrifugal compression forces. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification