Seal with pressure responsive tolerance control
Abstract
Abstract A SEALING DEVICE MOUNTED FOR AXIAL MOVEMENT ON A STATIONARY PORTION OF A GAS TURBINE ENGINE AND ARRANGED TO SEAL AGAINST THE UPSTREAM FACE OF THE HIGH PRESSURE TURBINE OF THE ENGINE. THE SEALING DEVICE IS ANNULAR IN FORM AND HAS TWO LIPS DEFINING AN ANNULAR CHANNEL AND A NUMBER OF RADIAL LANDS EXTENDING BETWEEN THE LIPS THEREBY DEFINING A PLURALITY OF EQU-SPACED RECESSES. IN OPERATION, THE RECESSES IN COMBINATION WITH THE TURBINE DISC FORM A NUMBER OF CHAMBERS WHICH ARE SUBJECTED TO A VARIABLE PRESSURE, THE CHAMBERS BEING IN COMMUNICATION WITH A SOURCE OF HIGH PRESSURE GAS. IF THE CLEARANCE BETWEEN THE SEALING DEVICE AND THE TURBINE DISC DECREASES THE PRESSURE IN THE CHAMBERS INCREASES AND VICE-VERSA, THE RESULTANT PRESSURE ON THE SEALING DEVICE ACTING TO MAINTAIN THE CLEARANCE AT A SUBSTANTIALLY CONSTANT VALUE. THE SEALING DEVICE MAY ALOS INCLUDE AN AXIAL SEALING ELEMENT WHICH CO-OPERATES WITH A SEALING ELEMENT PROVIDED ON THE TURBINE DISC SO THAT THE PRESSURE LOSS IN THE CHAMBER WHEN THE CLEARANCE IS LARGE IS RESTRICTED.
Inventors
- 👤 James A Petrie
- 👤 Willie Williamson
- 👤 Thomas Steel
- 👤 James I Hammond
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
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