Squeeze film damper

摘要

A bearing for a gas turbine engine may comprise a squeeze film damper. A bearing housing may comprise a roughened surface. The roughened surface may increase friction between the bearing housing and the oil in the squeeze film damper. The increased friction may increase the damping force in the squeeze film damper. The increased damping force may prevent oil inertia, and prevent resonant vibrations.

主权项

1. A bearing for a shaft comprising:
a rotating inner race configured to couple to the shaft; a non-rotating outer race disposed around the inner race; and a non-rotating housing disposed around the outer race, wherein the housing and the outer race define an annulus, and wherein the housing comprises a roughened surface comprising a plurality of surface features, the plurality of surface features having a height of between 10-20% of a clearance between the housing and the outer race.