WE CLAIM
1. A turbo machine roller bearing (10) that supports a shaft (4) constituted by a trunnion of a shaft line of a high-pressure spool of a turbo machine to rotate relative to a stationary support (8) that is connected to a casing of the turbo machine, said bearing (10) comprising rollers (12) inserted between an outer ring (14) disposed adjacent to the stationary support (8) and an inner ring (16) disposed adjacent to the high-pressure trunnion (4), said roller bearing being characterized in that the rollers are disposed along the axis at the end of the inner ring (16) extends along the axis beyond a downstream end of the high-pressure trunnion (4) to which it is secured by clamping means, said inner ring (16) also being provided with anti-rotation means for preventing said inner ring from rotating relative to the high-pressure trunnion (4).
2. A bearing as claimed in claim I, wherein the inner ring (16) is disposed inside the high-pressure trunnion (4).
3. A bearing as claimed in claim 2, wherein the inner ring (16) includes at least one notch (24) that is intended to cooperate axially with at least one catch (26) arranged in the downstream end of the high-pressure trunnion (4), so as to prevent said inner ring from rotating relative to the high-pressure trunnion (4).
4. A bearing as claimed in claim 3, wherein the inner, ring includes a nut (28) for being clamped against an upstream end of the inner ring (16), in order to secure it to the high-pressure trunnion (4).
I 5. A bearing as claimed in claim 2, wherein the inner ring (16) includes a plurality of splines (36) arranged at an upstream end and intended to cooperate radially with complementary splines (38) of the high-pressure trunnion (4), so as to prevent said inner ring from rotating relative to the high-pressure trunnion.
6. A bearing as claimed in claim 5, wherein the inner ring includes a nut (40) for being clamped onto the inner ring (16), at the downstream end of the high-pressure trunnion (4), in order to secure the inner ring to the high-pressure trunnion.
7. A bearing as claimed in claim I, wherein at least a portion of the inner ring (16) is disposed outside the high-pressure trunnion (4), said bearing being having at least one peg (42) for being inserted radially into holes (44, 46) respectively in
I*

the inner ring (16) and in the high-pressure trunnion, in order to prevent the inner ring from rotating relative to the high-pressure trunnion.
8. A bearing as claimed in claim 7, wherein the inner ring having an additional ring
(48) disposed inside the high-pressure trunnion (4) and having a downstream end
that is provided with a radial shoulder (50) for bearing axially against a
downstream end of the inner ring (16), and also includes a nut (52) for being
clamped against an upstream end of the additional ring (48) so as to secure the
inner ring to the high-pressure trunnion.
9. A bearing as claimed in claim 1, wherein the inner ring (16) is disposed in line
with the high-pressure trunnion (4).
10. A bearing as claimed in claim 9, wherein the inner ring (16) includes a plurality
of teeth (56) arranged at an upstream end and intended to cooperate axially with a
plurality of complementary teeth (58) arranged at the downstream end of the
high-pressure trunnion (4), so as to prevent said inner ring from rotating relative
to the high-pressure trunnion.
11. A bearing as claimed in claim 10, wherein the inner ring having a nut (60) for
being clamped against an upstream end of the inner ring (16) in order to secure it
to the high-pressure trunnion (4).
12. A bearing as claimed in claim 10 or claim 11, wherein the respective teeth (56,
58) of the inner ring (16) and of the high-pressure trunnion (4) are of trapezoidal
shape.
13. An inner ring (16) for a turbomachine roller bearing (10) according to any one of
claims 1 to 12.
14. A trunnion (4) of a shaft line of the high-pressure spool of a turbomachine, said
trunnion being supported by a roller bearing (10) according to any one of claims
1 to 12 to rotate relative to a stationary support (8) that is connected to a casing of
the turbomachine.