IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0123453
(2002-04-16)
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발명자
/ 주소 |
- Zabawa, Douglas J.
- Welch, Douglas A.
- Graves, William R.
|
출원인 / 주소 |
- United Technologies Corporation
|
인용정보 |
피인용 횟수 :
16 인용 특허 :
2 |
초록
▼
Rotor blades 40 for a bladed rotor feature a chamfered attachment 44 that improves the energy absorption capability of a snap ring 60 used as one component of a blade axial retention system. The chamfered attachment plastically deforms the snap ring rather than shearing through it in response to abn
Rotor blades 40 for a bladed rotor feature a chamfered attachment 44 that improves the energy absorption capability of a snap ring 60 used as one component of a blade axial retention system. The chamfered attachment plastically deforms the snap ring rather than shearing through it in response to abnormally high forces exerted on the blade.
대표청구항
▼
1. A blade for a bladed rotor, the blade having an attachment, the attachment having concave and convex flanks and proximal and distal ends, the proximal end having a chamfer feature in the form of a single chamfer proximate the convex flank.2. The blade of claim 1 wherein the attachment has a later
1. A blade for a bladed rotor, the blade having an attachment, the attachment having concave and convex flanks and proximal and distal ends, the proximal end having a chamfer feature in the form of a single chamfer proximate the convex flank.2. The blade of claim 1 wherein the attachment has a lateral width and the chamfer feature extends substantially the entire lateral width.3. The blade of claim 1, wherein the chamfer feature has a maximum depth proximate the convex flank.4. The blade of claim 1 wherein the attachment has a lateral width and the chamfer extends less than the entire lateral width.5. The blade of claim 1 wherein the attachment has a radius of curvature, the chamfer has a chamfer angle, and the chamfer angle is a function of at least the radius of curvature.6. The blade of claim 5 wherein the chamfer angle is inversely related to the radius of curvature.7. A blade for a bladed rotor, the blade having an attachment with proximal and distal ends, the proximal end having a chamfer feature in the form of a double chamfer.8. The blade of claim 7 wherein the proximal end has a nose.9. A blade for a bladed rotor, the blade having an attachment receivable in a slot of a rotor hub, the attachment having proximal and distal ends and convex and concave flanks, the proximal end including a chamfer extending laterally from a ridge toward the convex flank and a second chamfer extending laterally from the ridge toward the concave flank.10. A bladed rotor, comprising:a hub having a main body with peripheral slots; and a plurality of blades each having an attachment occupying one of the slots, each attachment having concave and convex flanks and proximal and distal ends, the proximal end of each blade attachment having a chamfer feature in the form of a single chamfer proximate the convex flank. 11. The rotor of claim 10 wherein the attachment has a lateral width and the chamfer feature extends substantially the entire lateral width.12. The rotor of claim 10 wherein the chamfer feature has a maximum depth proximate the convex flank.13. The rotor of claim 10 wherein the attachment has a lateral width and the chamfer feature is a single chamfer extending less than the entire lateral width.14. The rotor of claim 10 wherein the slot has a radius of curvature, the chamfer has a chamfer angle, and the chamfer angle is a function of at least the radius of curvature.15. The rotor of claim 14 wherein the chamfer angle is inversely related to the radius of curvature.16. A bladed rotor, comprising:a hub having a main body with peripheral slots; and a plurality of blades each having an attachment occupying one of the slots, each attachment having proximal and distal ends, the proximal end of each blade attachment having a chamfer feature in the form of a double chamfer. 17. The rotor of claim 16 wherein the proximal end includes a nose.18. A bladed rotor, comprising:a hub having a main body with peripheral slots; a plurality of blades each having an attachment occupying one of the slots, each attachment having proximal and distal ends, the proximal end of each blade attachment having a chamfer feature; and a load transfer element adjacent each blade attachment, the load transfer element having a spanwise extent, the chamfer feature also having a spanwise extent, and wherein at least part of the spanwise extent of the chamfer feature radially coincides with at least part of the spanwise extent of the load transfer element. 19. A blade for a bladed rotor, the blade having an attachment with a proximal end, a distal end and a lateral width, the proximal end having a chamfer feature extending substantially the entire lateral width.20. A blade for a bladed rotor, the blade having an airfoil and an attachment, the attachment having proximal and distal ends and a base surface, the proximal end having a chamfer feature extending from the base surface toward the airfoil.21. The blade of claim 20 wherein the attachment has a lateral width and the chamfer feature is a single chamfer extending substantially the entire lateral width.22. The blade of claim 20 wherein the blade has a curved attachment with convex and concave flanks, and the chamfer feature is a single chamfer having a maximum depth proximate the convex flank.23. The blade of claim 20 wherein the attachment has a lateral width and the chamfer feature is a single chamfer extending less than the entire lateral width.24. The blade of claim 20 wherein the attachment is a curved attachment having concave and convex flanks, the chamfer feature being a single chamfer proximate the convex flank.25. The blade of claim 24 wherein the attachment has a radius of curvature, the chamfer has a chamfer angle, and the chamfer angle is a function of at least the radius of curvature.26. The blade of claim 25 wherein the chamfer angle is inversely related to the radius of curvature.27. The blade of claim 20 wherein the chamfer feature is a double chamfer.28. The blade of claim 27 wherein the proximal end has a nose.29. A bladed rotor, comprising:a hub having a main body with peripheral slots; and a plurality of blades each having an attachment occupying one of the slots, each attachment having a proximal end, a distal end and a lateral width, the proximal end of each blade attachment having a chamfer feature extending substantially the entire lateral width. 30. A bladed rotor, comprising:a hub having a main body with peripheral slots; and a plurality of blades each blade having an airfoil and an attachment occupying one of the slots, each attachment having proximal and distal ends and a base surface, the proximal end of each blade attachment having a chamfer feature extending from the base surface toward the airfoil. 31. The bladed rotor of claim 30 wherein the attachment has a lateral width and the chamfer feature is a single chamfer extending substantially the entire lateral width.32. The bladed rotor of claim 30 wherein the blade has a curved attachment with convex and concave flanks, and the chamfer feature is a single chamfer having a maximum depth proximate the convex flank.33. The bladed rotor of claim 30 wherein the attachment has a lateral width and the chamfer feature is a single chamfer extending less than the entire lateral width.34. The bladed rotor of claim 30 wherein the attachment is a curved attachment having concave and convex flanks, the chamfer feature being a single chamfer proximate the convex flank.35. The bladed rotor of claim 34 wherein the attachment has a radius of curvature, the chamfer has a chamfer angle, and the chamfer angle is a function of at least the radius of curvature.36. The blade of claim 35 wherein the chamfer angle is inversely related to the radius of curvature.37. The blade of claim 30 wherein the chamfer feature is a double chamfer.38. The blade of claim 37 wherein the proximal end has a nose.39. A bladed rotor, comprising:a hub having a main body with peripheral slots; a blade retention system having a load transfer element; a plurality of blades each having an attachment occupying one of the slots, each attachment having proximal and distal ends, the proximal end of each blade attachment having a geometry selected to plastically deform the load transfer element in the event that excessive loads tend to urge a blade attachment out of its slot. 40. The rotor of claim 39 wherein the selected geometry is a chamfer feature.41. The rotor of claim 39 wherein the selected geometry is a rounded profile.42. A bladed rotor, comprising:a hub having a main body with peripheral slots; a plurality of blades each having an attachment occupying one of the slots, each attachment having proximal and distal ends; and a load transfer element adjacent each blade attachment. the load transfer element and the blade attachments defining a region of radial overlap therebetween, the proximal end of each blade attachment having a chamfer feature that extends radially across the entire region of radial overlap.
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