Patent US3881843A successfully refreshed from Google Patents.
US3881843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-pressure steam turbine casing
Assignee: BBC Brown Boveri AG Switzerland
•
Filing: 1973-10-31
•
Granted: 1975-05-06
•
Expires: 1993-10-31
Abstract
Abstract A foundation supported turbine structure includes a centrally guided inner casing within which is mounted the rotor and stationary guide blading and an outer casing which is spaced from the inner casing. The inner casing is supported by cantilever arms secured to the foundation and which extend laterally inward through openings provided in the outer casing to corresponding support points for the inner casing at opposite sides thereof. The outer casing includes support feet which are secured to the foundation and a bellows unit surrounds each cantilever arm at the pass-through opening in the outer casing for providing a fluid-tight connection.
Inventors
- 👤 Pierre Meylan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:28
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
A foundation supported turbine structure wherein the turbine casing is of the double-shell type comprising an inner casing within which is mounted the rotor and stationary guide blading and an outer casing spaced from said inner casing, central guide means for said inner casing for accommodating thermal expansion thereof, support means for said inner casing comprising cantilever arms carried by the foundation and extending laterally inward therefrom through openings provided in said outer casing to corresponding support points for said inner casing at opposite sides thereof, each said support point for said inner casing on said cantilever arm including a bearing structure mounted for omni-directional sliding movement on said arm in a horizontal plane, and means for supporting said outer casing at least indirectly by said foundation.
Claim 2
Dependent Claim
127 words
A foundation supported turbine structure wherein the turbine casing is of the double-shell type comprising an inner casing within which is mounted the rotor and stationary guide blading and an outer casing spaced from said inner casing, central guide means for said inner casing for accommodating thermal expansion thereof, support means for said inner casing comprising cantilever arms carried by the foundation and extending laterally inward therefrom through openings provided in said outer casing to corresponding support points for said inner casing at opposite sides thereof, each said support point for said inner casing on said cantilever arm including a bearing structure mounted for omni-directional sliding movement on said arm in a horizontal plane, and means for supporting said outer casing at least indirectly by said foundation.
Claim 3
Dependent Claim
28 words
A foundation supported turbine structure as defined in claim 1 wherein said means for supporting said outer casing includes means securing said outer casing directly to said foundation.
Claim 4
Dependent Claim
60 words
A foundation supported turbine structure as defined in claim 1 and which further includes a flexible bellows surrounding each of said cantilever arms, one end of said bellows being connected in a seal-tight manner to the cantilever arm and the other end thereof being connected in a seal-tight manner to said outer casing at the pass-through opening for said arm.
Claim 5
Dependent Claim
34 words
A foundation supported turbine structure as defined in claim 1 wherein at least one of said cantilever support arms for said inner casing is hollow so as to also provide a fluid inlet pipe.
Claim 6
Dependent Claim
92 words
A foundation supported turbine structure as defined in claim 1 wherein the bearing structure located at each said support point for said inner casing on said cantilever arm and which is mounted for omni-directional sliding movement on said arm is a horizontal plane includes a fixed slide plate at the inner end of said cantilever arm, and a movable plate slidable omni-directionally on said fixed plate, the upper side of said movable plate including a spherical surface engaged with a complementary spherical surface on a horizontal flanged part of said inner casing.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |