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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 longi

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.

대표청구항 ▼

A clearance control device in an inter-shaft bearing journal of a multi-spool turbojet engine, comprising: means for feeding cold oil; a first outer shaft which further comprises a high pressure trunnion of a shaft line of a high pressure spool, and including a bore and a first series of longitudina

A clearance control device in an inter-shaft bearing journal of a multi-spool turbojet engine, comprising: means for feeding cold oil; a first outer shaft which further comprises a high pressure trunnion of a shaft line of a high pressure spool, and including a bore and a first series of longitudinal holes and a second series of radial holes formed therein; a second, inner shaft which further comprises a low pressure trunnion of a shaft line of a lower pressure stage wherein said high pressure trunnion revolves in relation to said low pressure trunnion; an outer ring mounted directly on the first shaft; an inner ring mounted upon the second shaft; and a roller bearing mounted so as to be disposed between said first and second shaft and wherein said longitudinal holes of said high pressure trunnion have a length at least equal to the width of said outer ring and wherein said bore of said high pressure trunnion includes a series of grooves formed therein which communicate with said cold oil feeding means and via said radial holes with said series of longitudinal holes and within which the cooling oil circulates.