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US 12,753,705 B2Granted
Bearing for turbomachine variable pitch stator vane pivot, stator vane comprising such a bearing and turbomachine comprising such stator vanes
AssigneeSafran Aircraft Engines
InventorsNicolas Thibaut Guiot, Benoit André Pierre Frossard
Life of this patent
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Abstract
A bearing for a turbomachine variable pitch stator vane pivot mounted in a bore of a casing of the turbomachine and including a bushing integral with the bore and allowing rotation of a pivot rod within the casing, and additionally a ring mounted so as to be integral with the pivot rod inside the bushing and including an outer part providing the stiffening of the ring and an inner part integral with the outer part and providing a damping function.
Claims13
An assembly of bearings and turbomachine variable pitch stator vane pivots,
- each bearing being mounted in a respective bore passing through a casing of the turbomachine and including a respective bush solidly connected to said bore,
- each turbomachine variable pitch stator vane pivot comprising a lower pivot rod or an upper pivot rod, each lower or upper pivot rod rotating within the respective bore of the casing via the respective bearing,
- wherein each bearing further includes a ring mounted around and solidly connected to the respective lower or upper pivot rod inside the respective bush, said ring including an external part comprising a rigid material and an internal part solidly connected to the external part and comprising a flexible material wherein the internal part is thicker than the external part, and
- wherein a fastener, which is a screw, is inserted into the respective lower or upper pivot rod at an end of the respective lower or upper pivot rod that is opposite a vane blade, said fastener being configured to retain the ring axially within the respective bush.
1 more element
Dependencies are inferred from the claim text.