US3652177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Installation for the support of pivotal guide blades
Assignee: MTU Aero Engines AG
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Filing: 1970-05-19
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Granted: 1972-03-28
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Expires: 1990-05-19
Abstract
Abstract An installation for the pivotal support of guide blades of turbo machines particularly gas turbines in which chambers or passages are provided in the bearing support through which flows the cooling air; the blade shaft constructed as adjusting shaft is provided with an annular groove in its center bearing area and with another annular groove at the blade end whereby the two annular grooves are connected with each other by a thread; the central annular groove is in communication with the chambers or passages while the other annular groove is in communication with the guide blade space of the machine.
Inventors
- 👤 Wolf Loebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:39
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/16; F01D17/162; F05; F05D; F05D2250/00; F05D2250/20; F05D2250/24; F05D2250/241
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
98 words
An installation for supporting pivotal guide blades of turbomachines in which at least one passage is provided in a bearing support through which Flows cooling air, characterized in that a blade shaft constructed as an adjusting shaft is provided with annular grooves in its central bearing area and near the blade end thereof, which are in communication with each other by way of a thread, the central annular groove being in communication with the passage conducting the cooling air while the annular groove near the blade end is in communication with the guide blade space of the machine.
Claim 2
Dependent Claim
98 words
An installation for supporting pivotal guide blades of turbomachines in which at least one passage is provided in a bearing support through which Flows cooling air, characterized in that a blade shaft constructed as an adjusting shaft is provided with annular grooves in its central bearing area and near the blade end thereof, which are in communication with each other by way of a thread, the central annular groove being in communication with the passage conducting the cooling air while the annular groove near the blade end is in communication with the guide blade space of the machine.
Claim 3
Dependent Claim
16 words
An installation according to claim 1, characterized in that said thread has substantially cylindrical external surfaces.
Claim 4
Dependent Claim
36 words
An installation according to claim 2, characterized in that the blade shaft, starting from the central annular groove in the outward direction, is provided with a labyrinth seal means consisting of a number of annular grooves.
Claim 5
Dependent Claim
17 words
An installation according to claim 3, characterized in that the labyrinth seal means has cylindrical outer surfaces.
Claim 6
Dependent Claim
18 words
An installation according to claim 4, characterized in that the blade shaft is constructed as a hollow shaft.
Claim 7
Dependent Claim
46 words
An installation according to claim 5, characterized in that a bearing bush means with good anti-friction properties is inserted between the bearing support and the blade shaft, said bush means being provided with inlet and discharge bores for the cooling air corresponding to the support means.
Claim 8
Dependent Claim
70 words
An installation according to claim 6, characterized in that the bearing bush means is provided near the blade end with a portion of reduced diametric dimension so that an inwardly open annular space results between the housing bore and the bearing bush means, and in that the cooling air leaving the bearing bush means is conducted through the inwardly open annular space into the main flow channel of the turbo-machine.
Claim 9
Dependent Claim
43 words
An installation according to claim 7, characterized in that the blade shaft is provided near the blade end thereof with an annular collar that abuts at the inner end face of one of the two parts consisting of housing and bearing bush means.
Claim 10
Dependent Claim
39 words
An installation according to claim 8, characterized in that an axially prestressed spring means is provided which is supported, on the one hand, on the outer side of the bearing support and, on the other, at the blade shaft.
Claim 11
Dependent Claim
46 words
An installation according to claim 1, characterized in that a bearing bush means with good anti-friction properties is inserted between the bearing support and the blade shaft, said bush means being provided with inlet and discharge bores for the cooling air corresponding to the support means.
Claim 12
Dependent Claim
70 words
An installation according to claim 10, characterized in that the bearing bush means is provided near the blade end with a portion of reduced diametric dimension so that an inwardly open annular space results between the housing bore and the bearing bush means, and in that the cooling air leaving the bearing bush means is conducted through the inwardly open annular space into the main flow channel of the turbo-machine.
Claim 13
Dependent Claim
43 words
An installation according to claim 1, characterized in that the blade shaft is provided near the blade end thereof with an annular collar that abuts at the inner end face of one of the two parts consisting of housing and bearing bush means.
Claim 14
Dependent Claim
39 words
An installation according to claim 12, characterized in that an axially prestressed spring means is provided which is supported, on the one hand, on the outer side of the bearing support and, on the other, at the blade shaft.
Claim 15
Dependent Claim
36 words
An installation according to claim 12, characterized in that the blade shaft, starting from the central annular groove in the outward direction, is provided with a labyrinth seal means consisting of a number of annular grooves.
Claim 16
Dependent Claim
39 words
An installation according to claim 1, characterized in that an axially prestressed spring means is provided which is supported, on the one hand, on the outer side of the bearing support and, on the other, at the blade shaft.
Claim 17
Dependent Claim
36 words
An installation according to claim 1, characterized in that the blade shaft, starting from the central annular gRoove in the outward direction, is provided with a labyrinth seal means consisting of a number of annular grooves.
Claim 18
Dependent Claim
118 words
An installation for supporting pivotal guide blades of turbo-machines, comprising a blade shaft formed as an adjusting shaft carrying a blade at one end thereof, a bearing support surrounding said shaft and having at least one passage for conducting cooling air, said shaft being provided with an annular groove in its central bearing area and an annular groove near the blade end thereof, the central annular groove being in communication with the passage conducting the cooling air while the annular groove near the blade end is in communication with the guide blade space of the machine, the portion of said blade shaft between the central and blade end grooves being provided with a helical thread for communication therebetween.
Claim 19
Dependent Claim
118 words
An installation for supporting pivotal guide blades of turbo-machines, comprising a blade shaft formed as an adjusting shaft carrying a blade at one end thereof, a bearing support surrounding said shaft and having at least one passage for conducting cooling air, said shaft being provided with an annular groove in its central bearing area and an annular groove near the blade end thereof, the central annular groove being in communication with the passage conducting the cooling air while the annular groove near the blade end is in communication with the guide blade space of the machine, the portion of said blade shaft between the central and blade end grooves being provided with a helical thread for communication therebetween.
Claim 20
Dependent Claim
45 words
An installation according to claim 17, wherein the portion of said shaft extending from the central annular groove in the outward direction is provided with a labyrinth seal means in the form of a plurality of annular grooves for preventing the flow of cooling air.
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) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |