Means for controlling clearance in an intershaft bearing journal of a multi-spool gas turbine
US4500143A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1982 |
| Grant date | Feb 19, 1985 |
| Priority date | — |
| Expiry date | Dec 22, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2360/23
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A clearance control device in an inter-shaft turbojet engine bearing journal placed between a high pressure trunnion and a low pressure trunnion and including inserted between an inner ring and an outer ring, the high pressure trunnion including a series of longitudinal grooves and a series of longitudinal holes which are supplied with oil from an intake and an annular collector in the low pressure trunnion, from which the oil moves by centrifugation through radial holes into an annular recess in the downstream tightening nut of the outer ring, which in turn communicates with the grooves through holes formed in the nut. Clearance in the bearing journal is controlled by cooling the high pressure trunnion at the maximum operating speeds of the turbine via circulating oil. By virtue of an appropriate circuit, the oil supplied by the collector lubricates the bearing and cools the roller bearing journal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.