IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0299823
(1999-04-26)
|
우선권정보 |
FR-0005389 (1998-04-29) |
발명자
/ 주소 |
- Certain Nicolas Pierre Georges,FRX
- Jalaguier Jean-Pierre,FRX
- Ortega Edwin,FRX
|
출원인 / 주소 |
|
대리인 / 주소 |
Piper Marbury Rudnick & Wolfe
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
2 |
초록
▼
Each blade of the rotor has a rigid root oversleeve connected to a torsionable and flexible root strip by two laminated, spherical support half bearings, fixed by their outer frame with double rigid horns the lateral ends of which facing each other on each side of the strip and half bearings are cla
Each blade of the rotor has a rigid root oversleeve connected to a torsionable and flexible root strip by two laminated, spherical support half bearings, fixed by their outer frame with double rigid horns the lateral ends of which facing each other on each side of the strip and half bearings are clamped towards each other and against struts so as to allow a significant, calibrated pre-compression of the half bearings. The double horns and/or struts are fixed axially to the oversleeves by fixing elements distinct from the compression means of the double horns on the struts and perpendicular to these compression horns on the struts and perpendicular to these compression elements. One of the struts, possibly in a single piece with one double horn, is also in a single piece with a pitch lever.
대표청구항
▼
[ What is claimed is:] [1.] A rotor of the so-called "hingeless" type for a rotor aircraft, including:a hub, intended to be rotated around a rotor axis, andat least two blades, each of which is, on the one hand, connected to the hub by a root part including at least one strip torsionable around a lo
[ What is claimed is:] [1.] A rotor of the so-called "hingeless" type for a rotor aircraft, including:a hub, intended to be rotated around a rotor axis, andat least two blades, each of which is, on the one hand, connected to the hub by a root part including at least one strip torsionable around a longitudinal pitch change axis of the blade, and flexible at least in flapping in a direction substantially perpendicular to the pitch axis and substantially parallel to the rotor axis, and, on the other hand, is provided with a torsionally rigid blade root oversleeve, which is torsionally integral with the blade and the torsionable strip around the pitch axis, on the side of the outer axial part of the oversleeve relatives to the hub and along the pitch axis, whereas the inner axial part of the oversleeve surrounds the strip without contact, to which the oversleeve is connected by two laminated, spherical support half-bearings, substantially concentric on the pitch axis, and each comprising a stack of alternatively rigid and elastomer sphere portions between two rigid frames, one of which is an inner radial frame, relative to the pitch axis, held supported against one face of the strip, and the other of which is an outer radial frame fixed to the oversleeve, which supports a pitch lever projecting outwards from the oversleeve, wherein each of the two rigid outer frames is integral with respectively one of two rigid double horns extending transversely to the strip on both sides of the strip and the half-bearings, and, so that the ends facing one another on the two double horns, on each side of the strip and the two half bearings, are compressed towards each other and against one of respectively two struts placed between said facing ends of said double horns, so as to ensure a calibrated compression pre-stress of the laminated half bearings.
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