Method to supply oil to a multi-film damper
AssigneePratt & Whitney Canada Corp.
InventorsRichard Ivakitch, David Beamish
Life of this patent
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Abstract
A multi-film oil damper has a housing defining an annular damper cavity having an oil inlet in communication with a source of pressurized oil. A plurality of nested damper rings is disposed within the annular damper cavity, the plurality of nested damper rings defining a plurality of squeeze film annuli. Spacer rings are disposed adjacent opposed ends of the damper rings. A contact surface of the spacer rings extends radially beyond a first cylindrical surface of an associated damper ring for engaging a second cylindrical surface of an adjacent damper ring. Recesses are defined in the second cylindrical surface of the damper rings, the recesses fluidly communicating between the squeeze film annuli and the oil inlet.
Claims18
A multi-film oil damper in a gas turbine engine, comprising:
- a housing defining an annular damper cavity having an oil inlet in communication with a source of pressurized oil;
- a plurality of nested damper rings disposed within the annular damper cavity, the plurality of nested damper rings defining a plurality of squeeze film annuli, the nested damper rings having respective radially inner cylindrical surfaces and radially outer cylindrical surfaces, and at least one recess defined in the respective radially outer cylindrical surfaces of the plurality of nested damper rings communicating between the squeeze film annuli and the oil inlet;
- spacer rings disposed adjacent opposed ends of associated damper rings of the plurality of nested damper rings, a contact surface of the spacer rings extending radially outward of the radially outer cylindrical surface of an associated damper ring of the plurality of nested damper rings and engaging the radially inner cylindrical surface of an adjacent damper ring of the plurality of nested damper rings.
A multi-film oil damper for accommodating radial movement of a rotary shaft bearing relative to a bearing housing, the multi-film oil damper comprising:
- a plurality of coaxial nested damper rings disposed in an oil damper cavity of the bearing housing and sealed with an inner damper ring, the oil damper cavity having an oil inlet;
- the plurality of coaxial nested damper rings having respective spacer rings disposed at opposed axial ends thereof within a first cylindrical surface and having a recess within a second cylindrical surface, the recess fluidly connected to oil filled gaps between the plurality of coaxial nested damper rings and the oil inlet.
A method of supplying oil to a multi-film oil damper comprising:
- providing a plurality of coaxial nested damper rings disposed in an oil damper cavity,
- flooding the oil damper cavity with oil via an oil inlet;
- spacing the coaxial nested outer damper rings apart with spacer rings to define oil filled gaps therebetween;
- and
- providing a recess in respective ones of the plurality of coaxial nested damper rings adjacent the spacer rings to fluidly communicate between the oil filled gaps and the oil inlet.
Dependencies are inferred from the claim text.