US3584971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bladed rotor structure for a turbine or a compressor
Assignee: Westinghouse Electric Corp
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Filing: 1969-05-28
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Granted: 1971-06-15
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Expires: 1989-05-28
Abstract
Abstract This invention comprises rotor structure for a turbine or compressor having an annular row of blades thereon, the rotor having a peripheral groove and the blades having root portions of the radial entry type received in the groove. The blade roots are machined to absolute pitch dimension or slightly less and the blades are disposed in groups, each group having an arcuate shroud segment riveted to the tenons of the blades in the group. Total accumulated deficiency due to undersize pitch dimensions in each group is made up by a thin liner member interposed between blade roots in adjacent groups.
Inventors
- 👤 Ralph J Ortolano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:00
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; F01D5/32; F01D5/12; F01D5/22; F01D5/225; F01D5/3023; F01D5/303; F01D5/3038
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
162 words
A turbine rotor, comprising, a rotor disc having a circumferential groove, an annular array of blades carried by said disc and having root portions of the radial entry type, said root portions engaging said groove, said blades being disposed in arcuate groups having generally an equal number of blades in each group, said blades being provided with tenons, an arcuate shroud segment having equally spaced apertures adapted to mate with said tenons for joining the blades of each group so that the associated root portions of the blades within each group are disposed in end-to-end abutment, the number of blades in each group being generally equal to the number of blades that can mate with the equally spaced apertures of said shroud segment and remain in end-to-end abutment, said tenons being firmly connected to their associated shroud segments, and thin liner members interposed between the root portion of adjacent blade groups to adjust the thickness of the groups to a predetermined thickness.
Claim 2
Dependent Claim
162 words
A turbine rotor, comprising, a rotor disc having a circumferential groove, an annular array of blades carried by said disc and having root portions of the radial entry type, said root portions engaging said groove, said blades being disposed in arcuate groups having generally an equal number of blades in each group, said blades being provided with tenons, an arcuate shroud segment having equally spaced apertures adapted to mate with said tenons for joining the blades of each group so that the associated root portions of the blades within each group are disposed in end-to-end abutment, the number of blades in each group being generally equal to the number of blades that can mate with the equally spaced apertures of said shroud segment and remain in end-to-end abutment, said tenons being firmly connected to their associated shroud segments, and thin liner members interposed between the root portion of adjacent blade groups to adjust the thickness of the groups to a predetermined thickness.
Claim 3
Dependent Claim
48 words
The structure recited in claim 1, wherein the groove is provided with an enlarged opening to permit entry of the roots of the blades in the groove, the last blade is disposed in said enlarged opening, and means is provided for securing the last blade to the disc.
Claim 4
Dependent Claim
27 words
The structure recited in claim 1, wherein the arcuate segments are disposed in spaced end-to-end relation with each other and jointly encompass the annular array of blades.
Claim 5
Dependent Claim
23 words
The structure recited in claim 1, wherein the groove is of T-shaped cross section and the liners are of similar shape and size.
Claim 6
Dependent Claim
44 words
The structure recited in claim 1, wherein the thickness of at least some of the blade roots in each group is less than the theoretical predetermined thickness, and the thickness of the liner members is chosen in a manner to make up the difference.
References Cited (Backward Citations)
GB190619009A
Cited
US2283901A
Cited
FR872949A
Cited
US2916257A
Cited
DE1005530B
Cited
US3306577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |