Attachment unit of driving shaft with tensioner nut
AssigneeSnecma
InventorsJean Pierre Galivel, Regis Eugene Henri Servant
Life of this patent
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Abstract
The invention relates to a system for attaching the end of a shaft (14) of a gas turbine engine engaged inside a coupling (15) supported by a bearing (3). Said system comprising a nut (16) is characterized in that the nut (16) comprises a first thread (16f1) by which it is screwed into said shaft (14) and a second thread (16f2) by which it is screwed to said coupling (15). Advantageously, the screw pitches of the two threads (16f1, 16f2) of the nut (16) are reversed relative to one another so as to form an adjusting nut.
Claims8
A system for attaching the end of the HP compressor shaft (14) of a double-bodied gas turbine engine engaged inside the coupling (154) supported by a bearing (3) of the bevel gear (15) for driving the transmission shaft of the accessories gearbox, said system comprising a nut (16) and wherein the nut (16) comprises a first thread (16f1) by which it is screwed into said shaft (14) comprising a thread (14f) and a second thread (16f2) by which it is screwed to said coupling (154) comprising a thread (15f).
The system as claimed in one of the preceding claims, comprising a nut-lock (17).
The system as claimed in one of the preceding claims, wherein the shaft (14) and the coupling (154) are guided into one another by axial splines (153, 143).
The system as claimed in the preceding claim, wherein the bevel gear (15) comprises a means for clamping the bearing axially during the tightening of the nut.
A method of mounting the HP compressor shaft of a double-bodied turbine engine in its bearing before including the heating of the bearing, the mounting of a nut of the system as claimed in one of the preceding claims on the shaft and then the tightening of the nut forming an adjusting nut.
Dependencies are inferred from the claim text.