Assembly arrangement between a bearing inner race and a journal, race and journal suitable for such an arrangement, and turbomachine fitted therewith

Assembly arrangement between an inner race of a bearing and a journal supported in rotation in this bearing, the said journal having an axis, wherein it comprises:

• a journal annular groove made on an outer face of the said journal and a race annular groove made on an inner f ace of the said inner race, the said two annular grooves interacting to form an annular channel between the said journal and the said inner face when they are placed opposite one another,
• a retaining ring placed in the said annular channel, which prevents a relative movement, in translation along the said axis, between the said journal and the said inner race, and
• at least one recess of the said journal and at least one tooth of the said inner race, which interact to prevent a relative movement, in rotation about the said axis, between the said journal and the said inner race.