Patent US3758226A successfully refreshed from Google Patents.
US3758226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbo-compressor having means for drawing in working medium at low temperature
Assignee: Sulzer AG
•
Filing: 1972-07-10
•
Granted: 1973-09-11
•
Expires: 1992-07-10
Abstract
Abstract The bearing housing on the delivery side of the turbocompressor is surrounded in spaced relation by a bulkhead to define a chamber which communicates at one end with the suction branch. The opposite end of the chamber is connected to a source of working medium of high temperature so that heated working medium can flow over the bearing housing to maintain the lubricant therein in a fluid state and thereby prevent clogging in the drain-off ducts.
Inventors
- 👤 G Gyurech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:18
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/06; F04D29/063; F04D17/00; F04D17/08; F04D17/10; F04D17/12; F04D17/122; F04D29/05; F04D29/056; F04D29/58; F04D29/582; F04D29/584; F04D27/00; F04D27/02; F04D27/0207; F04D27/0215
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
126 words
A turbo-compressor comprising a suction branch for delivery of a low temperature working medium thereto; a bearing housing projecting into said suction branch; a bulkhead surrounding said bearing housing within said suction branch to define a first chamber concentrically between said bearing housing and said bulkhead and a second chamber between said bulkhead and the remainder of said suction branch, said bulkhead being spaced from said bearing housing to define at least one aperture communicating said first chamber with said second chamber; and means communicating with said first chamber for introducing a working medium of higher temperature than the temperature of the working medium in said suction branch into said first chamber to thermally shield said bearing housing from said working medium in said suction branch.
Claim 2
Dependent Claim
126 words
A turbo-compressor comprising a suction branch for delivery of a low temperature working medium thereto; a bearing housing projecting into said suction branch; a bulkhead surrounding said bearing housing within said suction branch to define a first chamber concentrically between said bearing housing and said bulkhead and a second chamber between said bulkhead and the remainder of said suction branch, said bulkhead being spaced from said bearing housing to define at least one aperture communicating said first chamber with said second chamber; and means communicating with said first chamber for introducing a working medium of higher temperature than the temperature of the working medium in said suction branch into said first chamber to thermally shield said bearing housing from said working medium in said suction branch.
Claim 3
Dependent Claim
87 words
A turbo-compressor as set forth in claim 1 which further comprises at least one compressor stage communicating with said second chamber in said suction branch and a labyrinth seal on a side of said compressor stage opposite said suction branch for sealing the interior of said compressor from an exterior chamber, and wherein said means communicates said exterior chamber with said first chamber to introduce heated high pressure working medium leaking from said compressor stage into said exterior chamber at a low pressure to said first chamber.
Claim 4
Dependent Claim
28 words
A turbo-compressor as set forth in claim 2 further comprising a piston between said compressor stage and said labyrinth seal for compensating axial thrust of said compressor stage.
Claim 5
Dependent Claim
45 words
A turbo-compressor as set forth in claim 1 which further comprises at least one compressor stage coMmunicating with said second chamber in said suction branch and wherein said means communicates an exit side of said compressor stage opposite said suction branch with said first chamber.
Claim 6
Dependent Claim
43 words
A turbo-compressor as set forth in claim 1 which further comprises a suction-side impeller having an inlet adjacent said second chamber to receive working medium therefrom and wherein said aperture is an annular gap extending upstream of said impeller inlet and concentrically thereof.
Claim 7
Dependent Claim
22 words
A turbo-compressor as set forth in claim 1 wherein said bulkhead includes a diffuser extending from said gap into said second chamber.
Claim 8
Dependent Claim
25 words
A turbo-compressor as set forth in claim 1 wherein said means includes a heating means for heating the working medium introduced into said first chamber.
Claim 9
Dependent Claim
58 words
A turo-compressor as set forth in claim 1 wherein said means is connected to said suction branch upstream of said aperture to draw off a part of the working medium passing through said suction branch, said means including a heating means for heating the drawn off portion of the working medium prior to introduction into said first chamber.
Claim 10
Dependent Claim
23 words
A turbo-compressor as set forth in claim 1 wherein said means communicates with a source of working medium mounted independently outside said turbo-compressor.
References Cited (Backward Citations)
US742231A
Cited
US980684A
Cited
US1123364A
Cited
US1675830A
Cited
US1936066A
Cited
US2278992A
Cited
US2283131A
Cited
US2402841A
Cited
US2660367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |