Lubrication arrangement for a gas turbine engine gear assembly

摘要

An exemplary apparatus for supplying lubricant to a gear assembly in a gas turbine engine includes a valve having a valve inlet configured to be coupled to a source of lubricant. A valve outlet is configured to direct lubricant to the gear assembly. The valve is selectively controllable into a plurality of settings for varying an amount of lubricant flowing from the valve inlet to the valve outlet. A bypass is associated with the valve. The bypass has an inlet configured to receive lubricant from the source and an outlet configured to direct lubricant to the gear assembly. The bypass permits at least a selected amount of lubricant to flow to the gear assembly independent of a setting of the valve.

主权项

1. A method of supplying lubricant to a geared architecture in a gas turbine engine, the method comprising:
providing a fan including a plurality of fan blades rotatable about an axis; situating a geared architecture for rotating the fan about the axis; providing a lubrication arrangement for supplying lubricant to the geared architecture, the lubrication arrangement including a source of lubricant, having a selectively controllable valve and a bypass associated with the valve; selectively directing lubricant from the source to the geared architecture through the selectively controllable valve; and always directing lubricant to the geared architecture through the bypass associated with the valve independent of an amount of the lubricant directed through the selectively controllable valve; wherein the bypass includes a restrictor, and the method comprises controlling the restrictor to alter an amount of lubricant directed through the bypass to the geared architecture.