US3795460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing apparatus for gas compressor
Assignee: Mitsui Engineering and Shipbuilding Co Ltd
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Filing: 1971-12-08
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Granted: 1974-03-05
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Expires: 1991-12-08
Abstract
Abstract Apparatus for sealing the rotor shaft of gas compressor by sealing liquid fed under pressure comprising buffer gas chambers for preventing the leakage of corrosive or noxious gas in the operating gas, non-corrosive and innoxious gas separated from the operating gas by condensation and evaporation being fed into the buffer gas chambers.
Inventors
- 👤 T Endo
- 👤 S Sugimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:59
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/102; F04D29/104; F04D29/58; F04D29/582; F04D29/5826; F04D29/5833
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
170 words
In a gas compressor apparatus having a rotor mounted on a driven shaft for compressing an operating fluid, sealing portions at opposite ends of said driven shaft and buffer gas chambers mounted around said shaft intermediate said rotor and said sealing portions to exclude flow of operating fluid from said rotor into said sealing portions, the improvement including a heat exchanger for the operating fluid flowing through said rotor, means to extract a portion of the operating fluid from said heat exchanger including a tank for containing the extracted fluid, said tank comprising means for separating corrosive or noxious components of the extracted operating fluid from the remainder, and means for directing at least a portion of said remainder into said buffer gas chambers in gaseous form whereby said buffer gas chambers are supplied with a gas which is free from corrosive or noxious components which may adversely affect said bearing portions and is composed only of the remainder of the operating fluid which does not contaminate said operating fluid.
Claim 2
Dependent Claim
170 words
In a gas compressor apparatus having a rotor mounted on a driven shaft for compressing an operating fluid, sealing portions at opposite ends of said driven shaft and buffer gas chambers mounted around said shaft intermediate said rotor and said sealing portions to exclude flow of operating fluid from said rotor into said sealing portions, the improvement including a heat exchanger for the operating fluid flowing through said rotor, means to extract a portion of the operating fluid from said heat exchanger including a tank for containing the extracted fluid, said tank comprising means for separating corrosive or noxious components of the extracted operating fluid from the remainder, and means for directing at least a portion of said remainder into said buffer gas chambers in gaseous form whereby said buffer gas chambers are supplied with a gas which is free from corrosive or noxious components which may adversely affect said bearing portions and is composed only of the remainder of the operating fluid which does not contaminate said operating fluid.
Claim 3
Dependent Claim
87 words
Apparatus according to claim 1 wherein said corrosive or noxious components of said operating fluid have a higher saturation temperature than the remainder, said extracting means comprising a conduit connected to said heat exchanger to direct condensate therefrom into said tank, said tank operating to separate said components by selective evaporation of the condensate, the means for directing at least a portion of said remainder comprising a conduit having one end connected to the top of said tank and its other end connected into said buffer chambers.
Claim 4
Dependent Claim
98 words
Apparatus according to claim 1 wherein said noxious or corrosive components have a lower saturation temperature than the remainder, said extraction means comprising a conduit connected to collect condensate from said heat exchanger and direct it into said tank, said means to direct at least a portion of said remainder from said tank comprising a conduit having one end connected to the bottom of said tank and its other end connected to said buffer chambers and an evaporator in said conduit to convert the remainder from condensate form to gaseous form prior to admission into said buffer chambers.
References Cited (Backward Citations)
US2608380A
Cited
FR1125782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |