US4363596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for surge detection and control in centrifugal gas compressors
Assignee: Bank of Nova Scotia
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Filing: 1980-05-19
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Granted: 1982-12-14
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Expires: 2000-05-19
Abstract
Abstract A centrifugal gas compressor having a shrouded rotatable impeller 14 in an impeller chamber 40, and provided with capacity control vanes 30 and a diffuser passage 18 throttle plate 38, is provided with surge control means including a thermistor 50 which senses a temperature rise beyond a predetermined value in the impeller chamber and exterior of the gas flow path through the impeller, and through relay means such as 52, 58 electrically connected to the thermistor 50 operates to change the compressor operation to a nonsurging condition.
Inventors
- 👤 Thomas E. Watson
- 👤 Paul R. Smallwood, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:57
CPC Classifications
F; F04; F04D; F04D27/00; F04D27/02; F04D27/0246; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/141; F01D17/143; F04D27/001; F04D27/0253; F05; F05D; F05D2250/00; F05D2250/50; F05D2250/51; F05D2250/52; F05D2270/00; F05D2270/30; F05D2270/303
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
In a centrifugal gas compressor having an impeller with a back plate mounted in an impeller chamber having a back wall, the method of detecting a surge condition comprising sensing a temperature rise beyond a predetermined value in a space in the impeller chamber of the compressor, exterior of the flow path of gas through the impeller and at a location between the impeller back plate and the back wall of the impeller chamber.
Claim 2
Dependent Claim
74 words
In a centrifugal gas compressor having an impeller with a back plate mounted in an impeller chamber having a back wall, the method of detecting a surge condition comprising sensing a temperature rise beyond a predetermined value in a space in the impeller chamber of the compressor, exterior of the flow path of gas through the impeller and at a location between the impeller back plate and the back wall of the impeller chamber.
Claim 3
Dependent Claim
95 words
In a centrifugal gas compressor having an impeller with a back plate mounted in an impeller chamber having a back wall, the method of controlling a surging condition comprising sensing a temperature rise beyond a predetermined value in a space in the impeller chamber exterior of the flow path of gas through the impeller and at a location between the impeller back plate and the back wall of the impeller chamber, and, in response to said sensed temperature rise, actuating means to change the flow and pressure conditions in said compressor to a non-surging condition.
Claim 4
Dependent Claim
95 words
In a centrifugal gas compressor having an impeller with a back plate mounted in an impeller chamber having a back wall, the method of controlling a surging condition comprising sensing a temperature rise beyond a predetermined value in a space in the impeller chamber exterior of the flow path of gas through the impeller and at a location between the impeller back plate and the back wall of the impeller chamber, and, in response to said sensed temperature rise, actuating means to change the flow and pressure conditions in said compressor to a non-surging condition.
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) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |