Patent US3738770A successfully refreshed from Google Patents.
US3738770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbines
Assignee: Rolls Royce Power Engineering PLC
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Filing: 1971-06-14
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Granted: 1973-06-12
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Expires: 1991-06-14
Abstract
Abstract A vapor turbine arrangement comprising a turbine having a plurality of bladed rotor wheels and provided with means for extracting liquid entrained within the vapor passing through the main vapor flow path of the turbine, which means are positioned to extract the liquid at a stage of the vapor expansion within the turbine upstream of a final bladed rotor wheel at the low pressure end of the turbine and which extract a portion of the vapor together with the liquid, the arrangement further having means for the return of the vapor to the main vapor flow path of the turbine, subsequent to separation of the vapor and liquid, at a stage of the vapor expansion within the turbine where the pressure of the vapor is only slightly lower than the pressure at which it was extracted, the vapor being returned to up-stream of at least one bladed rotor wheel of the turbine.
Inventors
- 👤 J Bolter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:40
CPC Classifications
F; F01; F01D; F01D3/00; F01D3/02; F01D25/00; F01D25/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
248 words
A vapor turbine arrangement comprising a turbine having a plurality of bladed rotor wheels and provided with means for extracting liquid entrained within the vapor passing through the main vapor flow path of the turbine, which means are positioned to extract the liquid at a stage of the vapor expansion within the turbine upstream of a final bladed rotor wheel at the low pressure end of the turbine and which extract a portion of the vapor together with the liquid, the arrangement further having means for the return of the vapor to the main vapor flow path of the turbine, subsequent to separation of the vapor and liquid, at a stage of the vapor expansion within the turbine where the pressure of the vapor is only slightly lower than the pressure at which it was extracted, the vapor being returned up-stream of at least one bladed rotor wheel of the turbine, the turbine being of the multi-flow type having at least two main flow paths for motive fluid through the turbine, liquid and vapor being extracted from a first main vapor flow path of the turbine and the vapor being returned to a second main vapor flow path of the turbine, subsequent to separation of the vapor and liquid, at a stage of the vapor expansion within the second main vapor flow path where the pressure of the vapor is only slightly lower than the pressure at which it was extracted from the first main vapor flow path.
Claim 2
Dependent Claim
248 words
A vapor turbine arrangement comprising a turbine having a plurality of bladed rotor wheels and provided with means for extracting liquid entrained within the vapor passing through the main vapor flow path of the turbine, which means are positioned to extract the liquid at a stage of the vapor expansion within the turbine upstream of a final bladed rotor wheel at the low pressure end of the turbine and which extract a portion of the vapor together with the liquid, the arrangement further having means for the return of the vapor to the main vapor flow path of the turbine, subsequent to separation of the vapor and liquid, at a stage of the vapor expansion within the turbine where the pressure of the vapor is only slightly lower than the pressure at which it was extracted, the vapor being returned up-stream of at least one bladed rotor wheel of the turbine, the turbine being of the multi-flow type having at least two main flow paths for motive fluid through the turbine, liquid and vapor being extracted from a first main vapor flow path of the turbine and the vapor being returned to a second main vapor flow path of the turbine, subsequent to separation of the vapor and liquid, at a stage of the vapor expansion within the second main vapor flow path where the pressure of the vapor is only slightly lower than the pressure at which it was extracted from the first main vapor flow path.
Claim 3
Dependent Claim
33 words
The vapor turbine arrangements as claimed in claim 1, in which more than one extraction of liquid and vapor and more than one return of vapor per main vapor flow path are made.
Claim 4
Dependent Claim
19 words
The vapor turbine arrangement as claimed in claim 1, in which vapor/liquid separation is effected within the turbine casing.
Claim 5
Dependent Claim
58 words
The vapor turbine arrangement as claimed in claim 1, in which the blade paths of the first and second main flow paths are designed to introduce the required difference in pressure of the vapor in the turbine between an extraction point in the first main flow path and a corresponding return point in the second main flow path.
Claim 6
Dependent Claim
52 words
The vapor turbine arrangement as claimed in claim 4, in which blades of at least a portion of the blade path in the first main vapor flow path are made to differ in length from the blades in a corresponding section of the blade path in the second main vapor flow path.
Claim 7
Dependent Claim
54 words
The vapor turbine arrangement as claimed in claim 4, in which the blade openings of at least a portion of the blade path in the first main vapor flow path are made to differ in width from the blade openings in corresponding sections of the blade path in the second main vapor flow path.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |