US3787141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filament reinforced motor assembly
Assignee: RTX Corp
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Filing: 1972-11-30
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Granted: 1974-01-22
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Expires: 1992-11-30
Abstract
Abstract A radially outwardly facing annular surface of a non-composite rotatable member, such as a rotor disc, includes a plurality of lobes extending radially outwardly from the surface. A filament reinforced composite annular ring surrounds the surface and is disposed on the lobes which serve to position it with respect to the rotatable member. The ring is spaced from the surface between adjacent lobes when the member is not rotating. The member is thus able to expand radially more rapidly than the composite ring which will deform as the member grows to reduce the space between it and the member until they are in contact or until the ring is taut whereupon the ring begins to carry the centrifugal loads of the rotating member.
Inventors
- 👤 T Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:02
CPC Classifications
F; F01; F01D; F01D21/00; F01D21/04; F01D21/045; F01D5/00; F01D5/12; F01D5/28; F01D5/282
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
A rotor assembly comprising: a noncomposite rotatable member having an axis and a radially outwardly facing annular surface, said surface forming a plurality of circumferentially spaced, radially outwardly extending lobes; and a filament reinforced composite annular ring having a radially inwardly facing annular surface in facing relationship to said outwardly facing annular surface and disposed on said lobes for positioning said ring with respect to said member, said inwardly facing annular surface being spaced from said outwardly facing annular surface between adjacent lobes and adapted to come into centrifugal load bearing relationship to said outwardly facing annular surface at rotor assembly operational speeds and temperatures due to the different centrifugal and thermal growth rates of said rotatable member and said composite annular ring.
Claim 2
Dependent Claim
123 words
A rotor assembly comprising: a noncomposite rotatable member having an axis and a radially outwardly facing annular surface, said surface forming a plurality of circumferentially spaced, radially outwardly extending lobes; and a filament reinforced composite annular ring having a radially inwardly facing annular surface in facing relationship to said outwardly facing annular surface and disposed on said lobes for positioning said ring with respect to said member, said inwardly facing annular surface being spaced from said outwardly facing annular surface between adjacent lobes and adapted to come into centrifugal load bearing relationship to said outwardly facing annular surface at rotor assembly operational speeds and temperatures due to the different centrifugal and thermal growth rates of said rotatable member and said composite annular ring.
Claim 3
Dependent Claim
45 words
The rotor assembly according to claim 1 wherein said lobes are the same size and shape and are spaced equally around said outwardly facing annular surface for providing balance to said rotatable member and for positioning said annular ring concentrically with respect to said axis.
Claim 4
Dependent Claim
54 words
The rotor assembly according to claim 2 wherein said lobes blend smoothly with the remaining portions of said outwardly facing annular surface and wherein said inwardly facing annular surface is adapted to come into flush relationship with said outwardly facing annular surface around the entire circumference thereof at rotor assembly operational speeds and temperatures.
Claim 5
Dependent Claim
191 words
A rotor assembly for a gas turbine engine comprising: a noncomposite disc having an axis and including an annular cavity therein concentric with said axis, said cavity including a radially outwardly facing annular surface, said surface forming a plurality of radially outwardly extending lobes of similar size and shape equally spaced about the circumference of said outwardly facing annular surface, said lobes blending smoothly with the remaining portions of said outwardly facing annular surface, said disc also including blade attaching means adapted to carry a plurality of rotor blades; and a filament wound composite annular ring having a radially inwardly facing annular surface in facing relationship to said outwardly facing annular surface and disposed on said lobes and coNcentrically positioned with respect to said axis, said inwardly facing annular surface being spaced from said outwardly facing annular surface between adjacent lobes when the rotor assembly is at rest and being adapted to come into substantially flush contact around the entire circumference of said outwardly facing annular surface at rotor assembly operational speeds and temperatures due to the different centrifugal and thermal growth rate of said disc and said composite annular ring.
Claim 6
Dependent Claim
191 words
A rotor assembly for a gas turbine engine comprising: a noncomposite disc having an axis and including an annular cavity therein concentric with said axis, said cavity including a radially outwardly facing annular surface, said surface forming a plurality of radially outwardly extending lobes of similar size and shape equally spaced about the circumference of said outwardly facing annular surface, said lobes blending smoothly with the remaining portions of said outwardly facing annular surface, said disc also including blade attaching means adapted to carry a plurality of rotor blades; and a filament wound composite annular ring having a radially inwardly facing annular surface in facing relationship to said outwardly facing annular surface and disposed on said lobes and coNcentrically positioned with respect to said axis, said inwardly facing annular surface being spaced from said outwardly facing annular surface between adjacent lobes when the rotor assembly is at rest and being adapted to come into substantially flush contact around the entire circumference of said outwardly facing annular surface at rotor assembly operational speeds and temperatures due to the different centrifugal and thermal growth rate of said disc and said composite annular ring.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |