US3700353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor structure and method of broaching the same
Assignee: Westinghouse Electric Corp
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Filing: 1971-02-01
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Granted: 1972-10-24
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Expires: 1991-02-01
Abstract
Abstract A method of broaching axial grooves for blade roots in a turbine rotor structure for a marine turbine having forward and astern elements exhausting to a common outlet and simultaneously broaching axial grooves for an integral exhaust baffle structure. The resulting structure is a rotor having a plurality of axial rows of grooves comprising an equal number of grooves in the rotor portion and the baffle structure.
Inventors
- 👤 Ralph J Ortolano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:23
CPC Classifications
F; F01; F01D; F01D15/00; F01D15/02; F01D15/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
159 words
A multi-stage rotor structure for a marine turbine unit comprising: a forward turbine element, rOtatable in one direction, and a reverse turbine element rotatable in the opposite direction, both elements being secured to said rotor, a baffle structure disposed between said driving and reversing turbine elements and secured to said rotor, said forward turbine element comprising a plurality of annular lands, each of said lands defining an annular array of equally spaced and axially extending grooves, a plurality of rotatable blades having roots of the side entry type disposed in said grooves, said baffle structure comprising an annular land portion and segmented portions; an array of equally spaced, axially extending grooves defined in said land portion, said segmented portions being disposed in said grooves in said land portion, and said grooves in said baffle structure and said grooves in said rotor structure being equal in number and axially aligned to cooperatively form a plurality of axial rows of grooves.
Claim 2
Dependent Claim
159 words
A multi-stage rotor structure for a marine turbine unit comprising: a forward turbine element, rOtatable in one direction, and a reverse turbine element rotatable in the opposite direction, both elements being secured to said rotor, a baffle structure disposed between said driving and reversing turbine elements and secured to said rotor, said forward turbine element comprising a plurality of annular lands, each of said lands defining an annular array of equally spaced and axially extending grooves, a plurality of rotatable blades having roots of the side entry type disposed in said grooves, said baffle structure comprising an annular land portion and segmented portions; an array of equally spaced, axially extending grooves defined in said land portion, said segmented portions being disposed in said grooves in said land portion, and said grooves in said baffle structure and said grooves in said rotor structure being equal in number and axially aligned to cooperatively form a plurality of axial rows of grooves.
Claim 3
Dependent Claim
34 words
The structure recited in claim 1 wherein the grooves in the rotor structure which are aligned with the grooves in the baffle structure are grooves for the rotatable blades of the forward turbine element.
Claim 4
Dependent Claim
48 words
The structure recited in claim 1 wherein the segmented portions of the baffle structure are comprised of root portions and plate portions, said root portions being disposed in the grooves in the land portion of the baffle structure, and said plate portions extending radially outward from the land.
Claim 5
Dependent Claim
23 words
The structure recited in claim 3 wherein the root portions are of fir tree cross section and are of the side entry type.
Claim 6
Dependent Claim
60 words
The structure recited in claim 3 wherein the plate portions are integral with the corresponding root portions and the opposing sides of the adjacent plate portions frictionally abut the sides of adjacent plate portions to jointly form an annular ring structure to help prevent spent steam from the forward and reversing turbine elements from impinging on the opposing turbine element.
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |