US3680979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor structure for turbo machines
Assignee: Elliott Turbomachinery Co Inc
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Filing: 1970-10-07
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Granted: 1972-08-01
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Expires: 1990-10-07
Abstract
Abstract In a built-up rotor structure employing a long thru-bolt as in multistage gas compressors and turbines, a support sleeve is fixed on the bolt passing through the assembly of wheels. A second sleeve is fixed within the assembly of wheels and has an interlocking connection with the support sleeve which serves to restrain the thru-bolt from becoming eccentric to the wheel assembly, and to increase the natural frequency of the bolt to avoid operation at resonant conditions. The structure nevertheless accommodates normal radial growth of the individual parts due to centrifugal forces and temperature changes, and axial growth due to temperature changes.
Inventors
- 👤 Raymond E Hansen
- 👤 Eugene L Huesgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:28
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/06; F01D5/066; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/284; F04D29/286
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
145 words
A rotor structure comprising a thru-bolt, a stub shaft fixed to each end of said thru-bolt, an assembly of wheels mounted intermediate said stub shafts and being fixedly secured thereto, said rotor structure also including a seal sleeve member disposed in the center area of said wheel assembly and fixedly secured thereto, said assembly being formed with a bore passage spaced concentrically about said thru-bolt, a support sleeve member fixed to said thru-bolt and having clearance with said bore passage, a second sleeve member mounted in said bore passage, said second sleeve being disposed axially of said support sleeve and being fixedly secured to said seal sleeve member, said second sleeve member encircling said thru-bolt in concentrically spaced relation thereto, the confronting ends of said sleeves being formed with interlocking means operable to restrain said thrubolt from radial displacement relative to said second sleeve member.
Claim 2
Dependent Claim
145 words
A rotor structure comprising a thru-bolt, a stub shaft fixed to each end of said thru-bolt, an assembly of wheels mounted intermediate said stub shafts and being fixedly secured thereto, said rotor structure also including a seal sleeve member disposed in the center area of said wheel assembly and fixedly secured thereto, said assembly being formed with a bore passage spaced concentrically about said thru-bolt, a support sleeve member fixed to said thru-bolt and having clearance with said bore passage, a second sleeve member mounted in said bore passage, said second sleeve being disposed axially of said support sleeve and being fixedly secured to said seal sleeve member, said second sleeve member encircling said thru-bolt in concentrically spaced relation thereto, the confronting ends of said sleeves being formed with interlocking means operable to restrain said thrubolt from radial displacement relative to said second sleeve member.
Claim 3
Dependent Claim
29 words
A structure as set forth in claim 1 wherein said interlocking means is formed with engaging portions permitting relative axial movement between said support sleeve and said second sleeve.
Claim 4
Dependent Claim
42 words
A structure as set forth in claim 1 wherein said interlocking means is formed with engaging portions permitting change in radial dimension in said seal sleeve member, thru-bolt and support sleeve and second sleeve due to change in temperature or centrifugal force.
Claim 5
Dependent Claim
47 words
A structure as set forth in claim 1 wherein one of said sleeve members is formed at the end thereof confronting said other sleeve member with a plurality of notches spaced apart circumferentially, said other sleeve member being formed with axially extending projections positioned in said notches.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |