IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0611223
(2000-07-06)
|
우선권정보 |
GB-19990015637 (1999-07-06) |
발명자
/ 주소 |
- Barton, John P
- Evans, Dale E
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
11 인용 특허 :
8 |
초록
▼
A seal (30) is provided for reducing the gap between alternate wall members (20) and adjacent blades (14) that are arranged circumferentially in a rotor (12). The seal (30) has a flange portion (36), which is inclined radially inward. The flange portion (36) of the seal (30) is in the form of rubber
A seal (30) is provided for reducing the gap between alternate wall members (20) and adjacent blades (14) that are arranged circumferentially in a rotor (12). The seal (30) has a flange portion (36), which is inclined radially inward. The flange portion (36) of the seal (30) is in the form of rubber bellows (32) which have a cavity (34) therein. In operation the flange portion (36) of the seal (30) is deflected radially outwards by centrifugal forces acting thereon. The seal (30) is open at one end to allow air compressed by the rotor (12) to pass into the cavity (34) and inflate the seal (30). Inflation of the seal (30) ensures that the gap between the edge (26) of the wall member (20) and the blade (14) is filled. A good seal is thus maintained throughout operation of the rotor (12) and prevents the air in void (28) passing into the blade passage.
대표청구항
▼
A seal (30) is provided for reducing the gap between alternate wall members (20) and adjacent blades (14) that are arranged circumferentially in a rotor (12). The seal (30) has a flange portion (36), which is inclined radially inward. The flange portion (36) of the seal (30) is in the form of rubber
A seal (30) is provided for reducing the gap between alternate wall members (20) and adjacent blades (14) that are arranged circumferentially in a rotor (12). The seal (30) has a flange portion (36), which is inclined radially inward. The flange portion (36) of the seal (30) is in the form of rubber bellows (32) which have a cavity (34) therein. In operation the flange portion (36) of the seal (30) is deflected radially outwards by centrifugal forces acting thereon. The seal (30) is open at one end to allow air compressed by the rotor (12) to pass into the cavity (34) and inflate the seal (30). Inflation of the seal (30) ensures that the gap between the edge (26) of the wall member (20) and the blade (14) is filled. A good seal is thus maintained throughout operation of the rotor (12) and prevents the air in void (28) passing into the blade passage. hat each wing (15a, 15b) is connected to the hub main parts (45a, 45b) at the suspension points (50a, 50b) by use of spherical bearings. 6. A rotor according to claim 1, characterized in that the central hub part (40, 90) of the hub assembly (30) is pivotally connected to the main shaft (35) so as to allow the angle between the plane defined by the sweeping motion of the at least two wings (15a, 15b) upon rotation and the axis of rotation of the main shaft (35) to be a geometrical degree of freedom. 7. A rotor according to claim 2, characterized in that each of the hub main parts (45a, 45b) is pivotally connected to the central hub part (40, 90) of the hub assembly in such a manner that the at least two main parts (45a, 45b) of the hub assembly (30) may be pivoted synchronously around an axis being inclined with respect to the longitudinal direction of each of the hub main parts (45a, 45b) so as to allow the angle between the plane defined by the sweeping motion of the at least two wings upon rotation and the axis of rotation of the main shaft (35) to be a geometrical degree of freedom. 8. A rotor according to claim 1, characterized in that the hub assembly (30) further comprises connecting means (60) arranged at each suspension point (50a, 50b) for hingedly connecting the wings to the hub main parts (45a, 45b) so as to allow the angle between the longitudinal extension of the wings (15a, 15b) and the axis of rotation of the rotor (10) to be a geometrical degree of freedom whereby the wings (15a, 15b) may cone. 9. A rotor according to claim 8, characterized in that the hub assembly (30) further comprises means (55) for controlling the coning of the wings (15a, 15b). 10. A rotor according to claim 9, characterized in that the coning controlling means are flex-beams (55) one for each wing of the rotor, the flex-beams are made of a flexible material and each of the flex-beams is individually attached to at least the root section of one wing and to the hub assembly (30). 11. A rotor according to claim 10, characterized in that each flex-beam (55) is an integral part of a wing. 12. A rotor according to claim 10, characterized in that each flex-beam (55) is connected to the hub assembly (30) via a hydraulic means, such as a hydraulic piston. 13. A rotor according to claim 9, characterized in that the coning controlling means (55) is a hydraulic means connected to a wing and to the hub assembly (30). 14. A rotor according to claim 1, characterized in that the hub assembly (30) further comprises at least one auxiliary part (70) having a support member (70b) extending form one hub main part (45b) to a position where another hub main part (45a) of the hub assembly (30) is connected to the central hub part (40, 90). 15. A rotor according to claim 14, characterized in that the hub assembly (30) further comprises at least one crossbeam (70a) extending from one hub main part (45b) to the support member (70b) extending from the same hub main part. 16. A rotor according to claim 15, characterized in that each of the flex-beam (55) of each wing is connected to a crossbeam (70a). 17. A rotor according to claim 14, characterized in that the auxiliary part (70) is an integral part of each of the hub main parts (45a, 45b). 18. A rotor according to claim 1, characterized in that the hub assembly (30) further comprises means for controlling the pitch of the wing. 19. A rotor according to claim 18, characterized in that the pitch controlling means is a hydraulic piston connected at one end to one hub main part (45a) and at the other end to another hub main part (45b). 20. A rotor according to claim 18, characterized in that the pitch controlling means is a hydraulic piston connected at one end to the central part (40, 90) of the hub assembly (30) and at the other end to a hub main part (45a). 21. A rotor according to claim 1, characterized in that the rotor comprises three wings (15c, 15d, 15e).
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