System for changing the pitch of the blades of a propeller
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B64C-011/38
F01D-007/00
B64C-011/30
F02K-003/072
F04D-029/36
출원번호
US-0154411
(2014-01-14)
등록번호
US-9884675
(2018-02-06)
우선권정보
FR-13 50438 (2013-01-18)
발명자
/ 주소
Curlier, Augustin
Belmonte, Olivier
출원인 / 주소
SNECMA
대리인 / 주소
Oblon, McClelland, Maier & Neustadt, L.L.P.
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
A system includes a linear-displacement fluidic actuator coaxial with the propeller, and a transmission device connecting the actuator to the blades that are to be controlled. The transmission device includes at least two radial arms arranged symmetrically with respect to the actuator and connected,
A system includes a linear-displacement fluidic actuator coaxial with the propeller, and a transmission device connecting the actuator to the blades that are to be controlled. The transmission device includes at least two radial arms arranged symmetrically with respect to the actuator and connected, on the inside, to a translationally mobile part of the actuator and, on the outside, to a translationally movable rotary transmission ring which is connected to the pivot pins of the blades by intermediate connecting mechanisms that convert the translational movement of the rotary ring brought about by the actuator into a rotation of the blades of the propeller.
대표청구항▼
1. A system for changing a pitch of blades of a propeller, comprising: a linear-displacement fluid actuator coaxial with the propeller; anda transmission device with radial arms connecting the actuator to the blades that are to be controlled,wherein the transmission device comprises a translationall
1. A system for changing a pitch of blades of a propeller, comprising: a linear-displacement fluid actuator coaxial with the propeller; anda transmission device with radial arms connecting the actuator to the blades that are to be controlled,wherein the transmission device comprises a translationally movable rotary transmission ring which is connected, on a first side, to the radial arms, a rotation of which, imparted during movement of the actuator, drives said translational movement of the translationally movable rotary transmission ring and, on a second side, to pivot pins of the blades via intermediate connecting mechanisms that convert the translational movement of the translationally movable rotary transmission ring brought about by the actuator into a rotation of the blades of the propeller about the pivot pins, a stiffening means being provided between the rotary ring and each of the intermediate connecting mechanisms. 2. The system as claimed in claim 1, wherein the translationally movable rotary transmission ring has a diameter substantially the same as at a diameter of a support ring that supports the pivot pins of the blades, so as to lie at substantially a same radial position as the pivot pins of the blades. 3. The system as claimed in claim 1, wherein a number of radial arms is less than a number of blades with a minimum number of radial arms of at least two arms arranged symmetrically with respect to the actuator and connected, on an inside of the radial arms, to a translationally mobile part of the actuator and, on an outside of the radial arms, to said translationally movable rotary transmission ring. 4. The system as claimed in claim 1, wherein, mounted around a translationally mobile part of the actuator are bearings connected to the translationally mobile part of the actuator and housed in a rotary cylindrical support with which the radial arms of the transmission device collaborate. 5. The system as claimed in claim 4, wherein the rotary cylindrical support comprises first axial platforms with first racks, first pinions being secured to first ends of the radial arms and collaborating with the first racks, said first platforms, being able to drive the rotation of said radial arms as a result of the translational movement of the translationally mobile part of the actuator and of the support. 6. The system as claimed in claim 1, wherein the translationally movable rotary transmission ring comprises second axial platforms with second racks, second pinions being secured to second ends of the radial arms and collaborating with second racks, said second platforms being slidably mounted in guideways that are translationally fixed, so that the second pinions of the radial arms, by rotating, drive a translational movement of the second platforms and of the translationally movable rotary transmission ring with respect to the guideways. 7. The system as claimed in claim 1, wherein the transmission device comprises four radial arms arranged so as to be uniformly spaced 90° apart about said linear actuator. 8. The system as claimed in claim 1, wherein each intermediate connecting mechanism of the transmission device comprises first and second link rods which are articulated to one another, the first link rod also being articulated to a fastening support for securing the translationally movable rotary transmission ring and the second link rod also being articulated to the pivot pin of a corresponding blade of the propeller, the first and second link rods of each intermediate connecting mechanism being substantially aligned parallel to an axis of rotation of the translationally movable rotary transmission ring and perpendicular to an axis of pivoting of the corresponding blade, and the stiffening means of each intermediate connecting mechanism being provided between the fastening support for securing the translationally movable rotary transmission ring and the first link rod, whereas the second, link rod of the intermediate connecting mechanism is articulated to a counterweight secured to the pivot pin of the corresponding blade. 9. The system as claimed in claim 8, wherein the stiffening means is a ring of elastic material surrounding the first link rod, a radial spring, or an element made of metal positioned between the support and the first link rod. 10. A turbomachine having at least one propeller for an aircraft, comprising a system for changing a pitch of blades of said propeller, said blades being controlled, comprising a linear displacement annular fluidic actuator and a transmission device with radial arms connecting the actuator to the blades being controlled in order to change an orientation of the blades, wherein the transmission device is of the type as defined in claim 1.
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이 특허에 인용된 특허 (7)
Hora Petr (West Chester OH) Hermans Thomas C. (Cincinnati OH) Bulman David E. (Cincinnati OH) Miller Edwin K. (West Chester OH) Wakeman Thomas G. (Lawrenceburg IN) Joyce David L. (West Chester OH), Aircraft pitch change mechanism.
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