Journal bearing assembly with dual oil cavities
AssigneePratt & Whitney Canada Corp.
InventorsBruno MARTIN, Louis BRILLON, Julien SIMARD-BERGERON
Life of this patent
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Abstract
A gas turbine engine comprising a gearbox, the gearbox having gear(s). A journal bearing assembly rotatably supports the gear, the journal bearing assembly having at least a pin, and a journal having a tubular body defining a pin-receiving inner cavity having an inner surface, a first cavity and a second cavity defined in the inner surface of the pin-receiving inner cavity, a rib support located between the first cavity and the second cavity, the rib support being aligned with a longitudinal center of the tubular body, with the first cavity and the second cavity on opposed axial sides of the rib support.
Claims20
A gas turbine engine comprising a gearbox, the gearbox having at least one gear, a journal bearing assembly rotatably supporting said gear, the journal bearing assembly having at least a pin, and a journal having a tubular body defining a pin-receiving inner cavity having an inner surface and receiving the pin therein, a first cavity and a second cavity defined in the inner surface of the pin-receiving inner cavity, a rib support located between the first cavity and the second cavity, the rib support being aligned with a longitudinal center of the tubular body, with the first cavity and the second cavity on opposed axial sides of the rib support, the pin-receiving inner cavity defining a pin-engaging surface contacting the pin at the rib support and between axial end faces and the first cavity and the second cavity.
A journal bearing assembly comprising
- a pin, and
- a journal defining an inner cavity receiving the pin, a first cavity and a second cavity defined in an inner surface of the pin-receiving cavity, a central support located between the first cavity and the second cavity and contacting said pin, the central support being aligned with a longitudinal center of the journal, the gin-receiving inner cavity defining a gin-engaging surface contacting the pin at the central support and between axial end faces and the first cavity and the second cavity.
A method for operatinq a journal bearing assembly comprising:
- receiving oil in a first cavity and a second cavity between a journal and a pin,
- abutting an axially-centered inner surface of the journal against the pin between the first cavity and the second cavity, and
- directing the oil from the first cavity and/or the second cavity to a recess between the journal and a part rotating on the journal.
Dependencies are inferred from the claim text.