US3741681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow turbine rotor assembly
Assignee: Westinghouse Electric Corp
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Filing: 1971-05-28
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Granted: 1973-06-26
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Expires: 1991-05-28
Abstract
Abstract Rotor assembly for axial flow turbines and the like characterized in that the rotor blades are supported from both the root and the tip of the blade. The blades are held in place by bolts which extend through the blades and are connected at their inner ends to a rotor disc and at their outer ends to the blade tips or to a band surrounding an outer shroud for the blade tips.
Inventors
- 👤 Witt S De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:53
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; F01D5/3007; F01D5/02; F01D5/08; F01D5/081; F05; F05B; F05B2240/00; F05B2240/80; F05B2240/801; F05D; F05D2240/00; F05D2240/80; F05D2240/81
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
149 words
In a turbine rotor having a rotor disc assembly, a plurality of radially extending blade elements disposed about the periphery of said disc assembly, each of said blade elements comprising a pedestal portion having a convex blade section at one side thereof and a concave blade section at the other side, each pedestal portion having a root portion engaging the disc assembly to attach the blade element thereto, the blade elements being disposed circumferentially around the disc assembly so that the blade sections of adjacent blade elements abut each other, said abutting blade sections being joined together to form radially extending, hollow turbine blades, means for supplying coolant fluid to flow through said hollow blades, and an elongated support rod extending radially through each of said blades the support rods being attached to the disc assembly and being connected to support the radially outer ends of the hollow blades.
Claim 2
Dependent Claim
149 words
In a turbine rotor having a rotor disc assembly, a plurality of radially extending blade elements disposed about the periphery of said disc assembly, each of said blade elements comprising a pedestal portion having a convex blade section at one side thereof and a concave blade section at the other side, each pedestal portion having a root portion engaging the disc assembly to attach the blade element thereto, the blade elements being disposed circumferentially around the disc assembly so that the blade sections of adjacent blade elements abut each other, said abutting blade sections being joined together to form radially extending, hollow turbine blades, means for supplying coolant fluid to flow through said hollow blades, and an elongated support rod extending radially through each of said blades the support rods being attached to the disc assembly and being connected to support the radially outer ends of the hollow blades.
Claim 3
Dependent Claim
37 words
The combination of claim 1 in which said support rods are essentially unloaded in the cold, zero speed condition of the turbine and are loaded to a predetermined stress under normal operating conditions of temperature and speed.
Claim 4
Dependent Claim
33 words
The combination of claim 2 in which said coolant fluid is directed into the spaces under the pedestal portions and between adjacent root portions and flows from said spaces into the hollow blades.
Claim 5
Dependent Claim
49 words
The combination of claim 2 in which each blade element is an integral member having a grooved root portion engaging corresponding grooves in the disc assembly, and the radially outer ends of the support rods being attached to cover plates engaging the radially outer ends of the hollow blades.
Claim 6
Dependent Claim
78 words
The combination of claim 2 in which each blade element is divided into two parts each consisting of one blade section, one-half the pedestal portion and one-half the root portion, the two parts abutting and the two half root portions being secured together, the root portions having grooves engaging corresponding grooves in the disc assembly, and the radially outer ends of the support rods being attached to cover plates engaging the radially outer ends of the hollow blades.
Claim 7
Dependent Claim
33 words
The combination of claim 2 and incLuding a shroud member encircling the outer ends of the hollow blades, and means for connecting the outer ends of the support rods to said shroud member.
References Cited (Backward Citations)
US779911A
Cited
US2774566A
Cited
US2967043A
Cited
GB926084A
Cited
FR1341910A
Cited
US3471127A
Cited
US3446481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |