System for the axial retention of a rolling element bearing

A system for the axial retention of a holding ring for a bearing for guiding in rotation a rotary shaft of a turbomachine extending along a longitudinal axis, the retention system comprising:

• an annular bearing support configured to be secured to a fixed part of the turbomachine, and
• a bearing holding ring carried by the annular bearing support, the bearing holding ring extending along the longitudinal axis and comprising an upstream ring located within the bearing support and a downstream ring that is elastically deformable and intended to be connected to the fixed part,
• wherein the bearing support comprises a first axial retention element, and the bearing holding ring comprises a second axial retention element, the first and second axial retention elements being configured to cooperate with each other to axially retain the bearing holding ring when the downstream ring is damaged, wherein the first and second axial retention elements each has at least two annular teeth extending along a radial axis perpendicular to the longitudinal axis, and wherein the axial retention elements of the bearing support and of the bearing holding ring extend circumferentially in a plane perpendicular to the longitudinal axis and comprise two circumferential ends, each circumferential end of the first axial retention element of the bearing support also comprising a chamfer on a respective upstream face.