Patent US3868197A successfully refreshed from Google Patents.
US3868197A
Expired / Lapsed
US
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Spacer rings for a gas turbine rotor
Assignee: Westinghouse Electric Corp
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Filing: 1973-10-26
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Granted: 1975-02-25
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Expires: 1993-10-26
Abstract
Abstract A gas turbine or compressor having a spacer ring between adjacent rotor discs. The discs and rings have shrink fitted mating grooves and lips. The frictional engagement between those discs and rings increases as the centrifugal forces acting upon those members increases.
Inventors
- 👤 Birger O Hugoson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:01
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
181 words
A spacer ring structure for a multi-stage turbomachine comprising an outer casing, at least two axially spaced-apart rotor discs, an annular array of radially directed rotor blades spaced on the periphery of each rotor disc, at least one annular array of stationary blades disposed between the arrays of the blades on the rotor periphery, each rotor having an axially directed flange member extending off at least one side thereof toward the adjacent disc, and at least one spacer ring shrunk fit into frictional engagement with and disposed between adjacent rotor discs, each of said axially extending flanges having a radially inwardly extending circumferential lip on their edges, each of said spacer rings having a radially outwardly directed circumferential groove on each edge, said radially outwardly directed circumferential groove on said spacer ring being in constricting frictional engagement with said radially inwardly directed circumferential lips on said flanges of said rotor discs, said shrunk fit spacer ring having an array of serrations on its outwardly extending groove to frictionally engage a portion of said flange adjacent said lip on said rotor disc.
Claim 2
Dependent Claim
181 words
A spacer ring structure for a multi-stage turbomachine comprising an outer casing, at least two axially spaced-apart rotor discs, an annular array of radially directed rotor blades spaced on the periphery of each rotor disc, at least one annular array of stationary blades disposed between the arrays of the blades on the rotor periphery, each rotor having an axially directed flange member extending off at least one side thereof toward the adjacent disc, and at least one spacer ring shrunk fit into frictional engagement with and disposed between adjacent rotor discs, each of said axially extending flanges having a radially inwardly extending circumferential lip on their edges, each of said spacer rings having a radially outwardly directed circumferential groove on each edge, said radially outwardly directed circumferential groove on said spacer ring being in constricting frictional engagement with said radially inwardly directed circumferential lips on said flanges of said rotor discs, said shrunk fit spacer ring having an array of serrations on its outwardly extending groove to frictionally engage a portion of said flange adjacent said lip on said rotor disc.
Claim 3
Dependent Claim
45 words
A spacer ring structure as recited in claim 1 wherein the side walls of said lips and the side walls of said grooves are generally obliquely inclined to provide a wedging action between the mating surfaces, due to centrifugal forces generated therein during machine operation.
References Cited (Backward Citations)
US1318091A
Cited
US2796836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |