Plain bearing for an aircraft turbomachine
AssigneeSafran Transmission Systems
InventorAdrien Louis Simon
Life of this patent
Estimating the term…
Abstract
A plain bearing for an aircraft turbomachine, the plain bearing having a tubular body including an outer cylindrical surface, an inner cavity designed to contain oil, a primary lubrification groove formed by a middle portion of the outer surface and a main channel for supplying the primary groove with oil, the plain bearing wherein the outer surface of the body further includes at least one secondary lubrification groove which is formed in an end portion of the outer surface and is independent of the primary groove, and in that the body further includes a secondary channel for supplying the or each secondary groove with oil.
Claims15
A plain bearing for an aircraft turbomachine, the plain bearing comprising a tubular body with a main axis and comprising:
- an external cylindrical surface extending around the axis over a major portion of an axial dimension of the body,
- two tubular mounting end caps located respectively at two opposite ends of the body along the axis,
- an internal cavity configured to receive oil and opening into the center of at least one of the end caps,
- a main lubrication groove which is recessed on the external surface of a middle portion of the body and which has an elongate shape along the axis, and
- a main channel for supplying oil to the main groove, which provides a fluid communication between the cavity and the main groove,
- wherein the body comprises two opposite end portions separated from each other by the middle portion of the body, at least one of the two opposite end portions comprising a secondary lubrication groove which is recessed in the external surface and which has an elongate shape along the axis and which is fluidly independent of the main groove, each secondary groove having a longitudinal dimension less than that of the main groove, each secondary groove extending into the external surface of the middle portion of the body to create an area of mutual overlap with the main groove,
- and in that the body further comprises a secondary channel for supplying oil to each secondary groove, which provides a fluid communication between the cavity and the secondary groove, said secondary channel having a minimum passage cross-section smaller than that of the main channel.
Dependencies are inferred from the claim text.