US3689176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbomachinery rotor consturction
Assignee: General Electric Co
•
Filing: 1971-04-02
•
Granted: 1972-09-05
•
Expires: 1991-04-02
Abstract
Abstract A turbomachinery rotor construction includes a disk having alternately offset fluid passage slots radially inwardly of each blade locking slot and fastener apertures disposed between the slots for use in connecting the disk to an annular rotor portion. The innermost portion of each aperture is located on a radius not less than that described by the innermost portion of the fluid passage slots so as to enhance the low cycle fatigue characteristics of the disk while reducing the disk rim dead load.
Inventors
- 👤 Thomas G Howell
- 👤 Bernard L Koff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:33
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; F01D5/3007; F01D5/3015; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
181 words
In a turbomachinery rotor of the type having a disk formed with a plurality of generally axially extending blade locking slots at its periphery, an annular rotor portion, and fastening means connecting said disk and said rotor portion adjacent the periphery of said disk, the improvement comprising: a fluid passage slot for each said blade locking slot, each said fluid passage slot formed as a continuation of and being offset from the radial axis of its respective blade locking slot, with peripheral adjacent ones of said fluid passage slots being offset in opposite directions from their respective locking slot radial axes so as to define an enlarged base portion between peripherally adjacent pairs of said fluid passage slots, a generally axially extending aperture formed through each enlarged base portion for receipt of said fastening means, with the radial innermost extent of said apertures being on a radius not less than the radius of the innermost extent of any of said fluid passage slots, and passage means formed in said annular rotor portion to enable passage of fluid into said passage slots.
Claim 2
Dependent Claim
181 words
In a turbomachinery rotor of the type having a disk formed with a plurality of generally axially extending blade locking slots at its periphery, an annular rotor portion, and fastening means connecting said disk and said rotor portion adjacent the periphery of said disk, the improvement comprising: a fluid passage slot for each said blade locking slot, each said fluid passage slot formed as a continuation of and being offset from the radial axis of its respective blade locking slot, with peripheral adjacent ones of said fluid passage slots being offset in opposite directions from their respective locking slot radial axes so as to define an enlarged base portion between peripherally adjacent pairs of said fluid passage slots, a generally axially extending aperture formed through each enlarged base portion for receipt of said fastening means, with the radial innermost extent of said apertures being on a radius not less than the radius of the innermost extent of any of said fluid passage slots, and passage means formed in said annular rotor portion to enable passage of fluid into said passage slots.
Claim 3
Dependent Claim
18 words
The improvement of claim 1 further characterized in that said fluid passage slots extend transversely of the disk.
Claim 4
Dependent Claim
33 words
The improvement of claim 1 further characterized in that said annular rotor portion includes a radial flange, said passage means being formed in said disk and rotor portion being connected through said flange.
Claim 5
Dependent Claim
167 words
A turbomachinery rotor comprising a disk formed with a plurality of axially extending blade locking slots at its periphery, a turbomachinery blade extending radially from each said locking slot and having a root portion engaged therewith, a plurality of fluid passage slots for delivery of pressurized fluid to the radial inner end of each said blade, each said fluid passage slot formed as a radially inward extension of its respective blade locking slot and being offset from the radial axis thereof, with peripherally adjacent fluid passage slots being offset in opposite directions so as to define an enlarged base portion between adjacent pairs of said fluid passage slots, an annular rotor portion, an aperture formed through each enlarged base portion and traversing said disk, with the radial innermost extent of said apertures being on a radius not less than the radius of the innermost extent of any of said fluid passage slots, and fastener means extending through said apertures and connecting said disk and said rotor portion.
Claim 6
Dependent Claim
167 words
A turbomachinery rotor comprising a disk formed with a plurality of axially extending blade locking slots at its periphery, a turbomachinery blade extending radially from each said locking slot and having a root portion engaged therewith, a plurality of fluid passage slots for delivery of pressurized fluid to the radial inner end of each said blade, each said fluid passage slot formed as a radially inward extension of its respective blade locking slot and being offset from the radial axis thereof, with peripherally adjacent fluid passage slots being offset in opposite directions so as to define an enlarged base portion between adjacent pairs of said fluid passage slots, an annular rotor portion, an aperture formed through each enlarged base portion and traversing said disk, with the radial innermost extent of said apertures being on a radius not less than the radius of the innermost extent of any of said fluid passage slots, and fastener means extending through said apertures and connecting said disk and said rotor portion.
Claim 7
Dependent Claim
23 words
The structure of claim 4 further characterized in that said rotor portion includes and is connected to said disk through a radial flange.
Claim 8
Dependent Claim
24 words
The structure of claim 5 further characterized in that said radial flange includes passage means for delivery of fluid to said fluid passage slots.
References Cited (Backward Citations)
US2807434A
Cited
US2873947A
Cited
US2858103A
Cited
US3266770A
Cited
US3164367A
Cited
US3490852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |