US3677663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damped turbomachine rotor assembly
Assignee: Avco Corp
•
Filing: 1970-10-01
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Granted: 1972-07-18
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Expires: 1990-10-01
Abstract
Abstract The disclosure illustrates a centrifugal compressor comprising an inducer hub telescoped over an adjacent shoulder of an impeller hub. A nut threaded on the impeller hub maintains the inducer hub, an intermediate annular resilient ring and the impeller hub in abutment with sufficient pressure to damp vibrations in the rotor assembly.
Inventors
- 👤 Val Cronstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:17
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/04; F01D5/043; F01D5/045; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/284; F04D29/285; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
A damped turbomachine rotor assembly comprising: a first annular hub spaced from its axis of rotation; a plurality of blades extending generally radially from said first hub; a second bladed annular hub outwardly spaced from its axis of rotation; a plurality of blades extending generally radially from said second hub and corresponding with the blades on said first hub to form a generally annular flow path across said rotor assembly, one of said hubs having a recess for retaining said ring within the periphery of said hubs; an annular resilient ring positioned between said first and second hubs; and means for maintaining said ring and hubs in abutment with sufficient pressure to damp vibrations in said rotor assembly.
Claim 2
Dependent Claim
118 words
A damped turbomachine rotor assembly comprising: a first annular hub spaced from its axis of rotation; a plurality of blades extending generally radially from said first hub; a second bladed annular hub outwardly spaced from its axis of rotation; a plurality of blades extending generally radially from said second hub and corresponding with the blades on said first hub to form a generally annular flow path across said rotor assembly, one of said hubs having a recess for retaining said ring within the periphery of said hubs; an annular resilient ring positioned between said first and second hubs; and means for maintaining said ring and hubs in abutment with sufficient pressure to damp vibrations in said rotor assembly.
Claim 3
Dependent Claim
57 words
A rotor assembly as in claim 1 wherein: said first hub further comprises an elongated axially extending shaft portion; said second hub is telescoped over the elongated shaft portion of the other hub; and the means for maintaining said disks and hubs in abutment comprises an element secureD to the elongated shaft portion of said first hub.
Claim 4
Dependent Claim
30 words
A rotor assembly as in claim 2 wherein said hub is an inducer hub and said first hub is an impeller hub, whereby said rotor assembly comprises a centrifugal compressor.
Claim 5
Dependent Claim
42 words
A rotor assembly as in claim 3 wherein said inducer is telescoped over said impeller and said abutment maintaining means comprises a sleeve element threaded over said elongated shaft portion of said impeller hub for holding said disks and hubs in abutment.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |