IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0908451
(2010-10-20)
|
등록번호 |
US-8517685
(2013-08-27)
|
우선권정보 |
FR-09 05167 (2009-10-27) |
발명자
/ 주소 |
|
출원인 / 주소 |
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대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
3 |
초록
▼
A device (10) for reducing vibration of a main rotor (1) having a support (20) and a plurality of heavy elements (30) and of rollers (50). Each heavy element (30) includes two first openings (31) respectively at least partially in registration with two second openings (22) of the support (20. Each r
A device (10) for reducing vibration of a main rotor (1) having a support (20) and a plurality of heavy elements (30) and of rollers (50). Each heavy element (30) includes two first openings (31) respectively at least partially in registration with two second openings (22) of the support (20. Each roller (50) passes through a first opening (31) and a second opening (22). The device (10) has link means (60) for connecting the support (20) to the hub (2). A drive shaft (70) and a drive means (80) rotate at a first speed of rotation (V1) greater than a second speed of rotation (V2) of the hub (2). The drive shaft (70) rotates about an axis of rotation (AX1) of the support (20). The link means (60) is connected to the support (20) by a link member (90) enabling the support (20) to rotate about the axis of rotation (AX1) relative to the link means (60).
대표청구항
▼
1. A device for reducing the vibration of a rotorcraft main rotor provided with a hub and a plurality of blades, the device having a plurality of heavy elements,a support with a pair of second openings per heavy element,a plurality of rollers,each heavy element includingtwo first openings that are r
1. A device for reducing the vibration of a rotorcraft main rotor provided with a hub and a plurality of blades, the device having a plurality of heavy elements,a support with a pair of second openings per heavy element,a plurality of rollers,each heavy element includingtwo first openings that are respectively at least partially in registration with the pair of second openings of the support, each roller in the plurality of rollers passing through a first opening and a second opening at least partially in registration with each other in order to attach a heavy element to the support,link means for connecting the support to the hub,a drive shaft and drive means rotating at a first speed of rotation (V1) greater than a second speed of rotation (V2) of the hub, the drive shaft being constrained to rotate about an axis of rotation (AX1) with the support,a link member connecting the link means to the support the link member enabling the support to rotate about the axis of rotation (AX1) relative to the link means, anda protective casing provided with a bottom fairing hermetically fastened to an outer shoulder of the link means, the casing having a top fairing fastened to the bottom fairing to form a closed container, the top fairing including at least one sloping plane directed towards a roller, wherein the casing is hermetically fastened to the link means so as to be constrained to rotate with the link means about the axis of rotation (AX1), the casing covering the support and an element fastened to the support by the rollers, the casing being partially filled with a lubricant. 2. A device according to claim 1, wherein the link member comprises a ball bearing. 3. A device according to claim 1, wherein the drive means is a motor dedicated to driving the support. 4. A device according to claim 1, wherein the drive means is a rotary member of a power transmission gearbox. 5. A device according to claim 1, wherein the support includes at least one feed rod suitable for directing the lubricant towards a second opening. 6. A device according to claim 1, wherein each heavy element has a top face (FSUP) and a bottom face (FINF) suitable for facing a hub, and at least one of the faces (FINF, FSUP) is secured to an additional weight. 7. A device according to claim 6, wherein the additional weight includes a slot facing each first opening in the associated heavy element. 8. A device according to claim 1, wherein each of the first and second openings has a section describing a ring (Cl) on a predetermined circular arc (α). 9. A rotorcraft having a main rotor comprising a hub, the hub being set into rotation by a rotor mast and driven by a first stage of a power transmission gearbox, wherein the rotorcraft includes a device for reducing vibration of the main rotor, the device having a support and a plurality of heavy elements and of rollers, each heavy element having two first openings respectively at least partially in registration with two second openings of the support, each roller passing through a first opening and a second opening at least partially in registration with each other in order to attach a heavy element to the support, the device being provided with: drive means rotating at a first speed of rotation (V1) greater than a second speed of rotation (V2) of the hub, the drive shaft being constrained to rotate about an axis of rotation (AX1) with the support;link means connecting the support to the hub and including a drive shaft, the link means being connected to the support by a link member enabling the support to rotate about the axis of rotation (AX1) relative to the link means; anda protective casing provided with a bottom fairing hermetically fastened to an outer shoulder of the link means, the casing having a top fairing fastened to the bottom fairing to form a closed container, the top fairing including at least one sloping plane directed towards a roller, the casing being fastened hermetically to the link means in such a manner as to be secured to rotate with the link means about the axis of rotation (AX1), the casing covering the support and the heavy elements fastened to the support via the rollers, the casing being partially filled with a lubricant. 10. A rotorcraft according to claim 9, wherein the drive means comprise a rotary member of the power gearbox, the rotary member performing rotary motion at the first speed of rotation (V1). 11. A rotorcraft according to claim 9, wherein the drive means and the rotor mast are coaxial. 12. A device for reducing the vibration of a rotorcraft main rotor provided with a hub and a plurality of blades, the device having a plurality of heavy elements, each heavy element having a top face (FSUP) and a bottom face (FINF) suitable for facing a hub, and at least one of the faces (FINF, FSUP) is secured to an additional weight,a support with a pair of second openings per heavy element,a plurality of rollers,each heavy element includingtwo first openings that are respectively at least partially in registration with the pair of second openings of the support, each roller in the plurality of rollers passing through a first opening and a second opening at least partially in registration with each other in order to attach a heavy element to the support,link means for connecting the support to the hub,a drive shaft and drive means rotating at a first speed of rotation (V1) greater than a second speed of rotation (V2) of the hub, the drive shaft being constrained to rotate about an axis of rotation (AX1) with the support,a link member connecting the link means to the support the link member enabling the support to rotate about the axis of rotation (AX1) relative to the link means, anda protective casing hermetically fastened to the link means so as to be constrained to rotate with the link means about the axis of rotation (AX1), the casing covering the support and an element fastened to the support by the rollers, the casing being partially filled with a lubricant. 13. A device according to claim 12, wherein the additional weight includes a slot facing each first opening in the associated heavy element.
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