US3746128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Procedure for improving the sealing of an aerodynamic pressure wave machine and a device to effect the procedure
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1971-09-28
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Granted: 1973-07-17
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Expires: 1991-09-28
Abstract
Abstract In sealing an aerodynamic pressure-wave machine including a sealing ring between a rotor, supported by an overhung bearing at its cooler end and consisting of at least one cell wheel and shaft, and the rotor-side bearing of the machine, improved sealing is secured by cooling the sealing ring with sprayed oil, the oil escaping from the sealing ring being conducted to the hot end of the cell wheel.
Inventors
- 👤 A Wunsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:39
CPC Classifications
F; F04; F04F; F04F13/00; F02; F02B; F02B33/00; F02B33/32; F02B33/42; F16; F16J; F16J15/00; F16J15/16; F16J15/162; F16J15/32; Y; Y02; Y02E; Y02E20/00; Y02E20/16; Y10; Y10S; Y10S277/00; Y10S277/93
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
An aerodynamic pressure wave machine comprising a rotor having a hollow hub and a cell wheel, a shaft projecting from one end of said rotor and which is supported by an overhung bearing, a housing for a relatively cool gas disposed adjacent said cell wheel at the overhung bearing end of said rotor, a relatively hot gas housing disposed adjacent the opposite end of said rotor, a sealing ring surrounding and in contact with said rotor shaft at the rotor side of said bearing, means providing a flow path for a coolant oil to and from said sealing ring, and means providing a flow path directing any of the oil as may happen to escape said sealing ring away from the cold end of said cell wheel and into said hollow hub for flow therethrough to the hot end of said cell wheel.
Claim 2
Dependent Claim
143 words
An aerodynamic pressure wave machine comprising a rotor having a hollow hub and a cell wheel, a shaft projecting from one end of said rotor and which is supported by an overhung bearing, a housing for a relatively cool gas disposed adjacent said cell wheel at the overhung bearing end of said rotor, a relatively hot gas housing disposed adjacent the opposite end of said rotor, a sealing ring surrounding and in contact with said rotor shaft at the rotor side of said bearing, means providing a flow path for a coolant oil to and from said sealing ring, and means providing a flow path directing any of the oil as may happen to escape said sealing ring away from the cold end of said cell wheel and into said hollow hub for flow therethrough to the hot end of said cell wheel.
Claim 3
Dependent Claim
45 words
An aerodynamic pressure wave machine as defined in claim 1 wherein said means providing a flow path directing escape coolant oil into said hollow hub includes deflector plates which prevent the oil from reachiNg the surfaces of said cell wheel at the cold end thereof.
Claim 4
Dependent Claim
23 words
An aerodynamic pressure wave machine as defined in claim 1 where the coolant oil is delivered to said sealing ring in spray form.
Claim 5
Dependent Claim
27 words
An aerodynamic pressure wave machine as defined in claim 1 wherein the coolant oil is delivered to said sealing ring through ducts provided within said rotor shaft.
Claim 6
Dependent Claim
72 words
An aerodynamic pressure wave machine as defined in claim 1 and which further includes means providing a flow path for pressurized oil to and from said overhung bearing and which is conducted to the bearing for lubricating the same through internal ducts provided in said rotor shaft, the coolant oil for said sealing ring being supplied thereto from the same internal duct system within said rotor shaft as supplies said overhung bearing.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |