Patent US3621908A successfully refreshed from Google Patents.
US3621908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transporting thermal energy through a rotating device
Assignee: Dynatherm Corp
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Filing: 1970-09-04
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Granted: 1971-11-23
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Expires: 1990-09-04
Abstract
Abstract The invention provides for transporting heat through a sealed rotating device. It is of value for cooling rotating elements that are subject to heating, particularly elements that cannot be cooled by conventional means, such as the rotor of an enclosed motor or generator.
Inventors
- 👤 Milton F Pravda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:23
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/08; F01D5/085; F01D5/088; F02; F02C; F02C7/00; F02C7/08; F02C7/10; F28; F28D; F28D15/00; F28D15/02; F28D15/0208
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
247 words
A rotatable heat transfer device for transporting thermal energy comprising a rotatable hollow cylinder, a pair of axially spaced hollow members on the cylinder which rotate therewith, said cylinder and members having communicaTing hollow interiors which together form a hermetically sealed space, a heat transfer agent in said space in an amount to partially fill the same, one of said members serving as an evaporator section in which said agent, in liquified form, is vaporized and the other member serving as a condenser section in which said vapors are condensed, at least one syphon tube having a longitudinal portion extending through the interior of the cylinder and having at each end a leg which extends into each member, said cylinder acting to pass vapors from the evaporator section to the condenser section and said tube passing condensed vapors from the condenser section to the evaporator section, means in said sealed space for preventing the flow of condensed vapors into said cylinder, said cylinder and members being rotatable at a rotational velocity sufficient to distribute the agent over the internal surfaces of said members, said evaporator section receiving heat to vaporize the agent therein and the resulting vapors passing through said hollow cylinder to said condenser section and there condensing to give up latent heat of condensation, said condensed vapors, after steady state operation is reached, passing from the condenser section through said syphon tube to the evaporator section, and said condenser section acting to dissipate said heat.
Claim 2
Dependent Claim
247 words
A rotatable heat transfer device for transporting thermal energy comprising a rotatable hollow cylinder, a pair of axially spaced hollow members on the cylinder which rotate therewith, said cylinder and members having communicaTing hollow interiors which together form a hermetically sealed space, a heat transfer agent in said space in an amount to partially fill the same, one of said members serving as an evaporator section in which said agent, in liquified form, is vaporized and the other member serving as a condenser section in which said vapors are condensed, at least one syphon tube having a longitudinal portion extending through the interior of the cylinder and having at each end a leg which extends into each member, said cylinder acting to pass vapors from the evaporator section to the condenser section and said tube passing condensed vapors from the condenser section to the evaporator section, means in said sealed space for preventing the flow of condensed vapors into said cylinder, said cylinder and members being rotatable at a rotational velocity sufficient to distribute the agent over the internal surfaces of said members, said evaporator section receiving heat to vaporize the agent therein and the resulting vapors passing through said hollow cylinder to said condenser section and there condensing to give up latent heat of condensation, said condensed vapors, after steady state operation is reached, passing from the condenser section through said syphon tube to the evaporator section, and said condenser section acting to dissipate said heat.
Claim 3
Dependent Claim
12 words
Device of claim 1 wherein a plurality of syphon tubes are present.
Claim 4
Dependent Claim
18 words
Device of claim 1 wherein said means comprises a plate interposed between said cylinder and the condenser section.
Claim 5
Dependent Claim
27 words
Device of claim 1 wherein said evaporator section is adapted to be placed in heat exchange relation with a heated rotating body which is to be cooled.
Claim 6
Dependent Claim
58 words
Device of claim 1 wherein initially said condensed vapors accumulate in the condenser section and are prevented from passing into the hollow cylinder by said means, and wherein said condensed vapors flow through said syphon tube continuously after first filling up said leg in the condenser section and the longitudinal portion of the tube in the hollow cylinder.
Claim 7
Dependent Claim
66 words
Device of claim 4 wherein said evaporator section is in heat exchange relation with the heated rotor of an electric motor or generator and receives heat therefrom, said rotatable hollow cylinder comprises at least a part of the shaft of said motor or generator, and wherein said condenser section is disposed outwardly of a housing for the motor or generator in order to dissipate heat therefrom.
Claim 8
Dependent Claim
34 words
Device of claim 8 wherein a second evaporator section is present, axially spaced from said first-mentioned one, said evaporator sections being disposed at each end of the rotor and in heat exchange relation therewith.
Claim 9
Dependent Claim
51 words
Device of claim 7 wherein said condenser section is in the form of a group of individual chambers which extend radially from said cylinder, each said chamber being connected to one of said evaporator sections by a syphon tube, and said group of chambers acting as a fan to dissipate heat.
Claim 10
Dependent Claim
24 words
Device of claim 8 wherein said evaporator section is embedded in said rotor and is of a diameter almost equal to the rotor diameter.
Claim 11
Dependent Claim
58 words
Device of claim 4 wherein said evaporator section is in heat exchange relation with the heated turbine section of a gas turbine engine and receives heat therefrom, said rotatable hollow cylinder comprises at least part of the shaft of said engine, and wherein said condenser section is in heat exchange relation with the compressor section of said engine.
Claim 12
Dependent Claim
45 words
Device of claim 10 wherein said evaporator section comprises a plurality of stages, said condenser section comprises a plurality of stages, and wherein a plurality of syphon tubes are present each connecting a stage of the evaporator section with a stage of the condenser section.
Claim 13
Dependent Claim
121 words
A rotatable heat transfer device for transporting thermal energy comprising a rotatable hollow cylinder, and an evaporator section and a condenser section on said cylinder axially spaced from each other and rotatable with the cylinder, a heat transfer agent in said device which is vaporizable in the evaporator section and condensable in the condenser section, said cylinder acting to conduct vapors from the evaporator section to the condenser section, at least one syphon tube in the device extending from the condenser section through said cylinder to the evaporator section and serving to conduct condensed vapors back to the evaporator section, and means disposed between the condenser section and said cylinder for barring the flow of said condensed vapors into said cylinder.
Claim 14
Dependent Claim
121 words
A rotatable heat transfer device for transporting thermal energy comprising a rotatable hollow cylinder, and an evaporator section and a condenser section on said cylinder axially spaced from each other and rotatable with the cylinder, a heat transfer agent in said device which is vaporizable in the evaporator section and condensable in the condenser section, said cylinder acting to conduct vapors from the evaporator section to the condenser section, at least one syphon tube in the device extending from the condenser section through said cylinder to the evaporator section and serving to conduct condensed vapors back to the evaporator section, and means disposed between the condenser section and said cylinder for barring the flow of said condensed vapors into said cylinder.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |