Feathering-spindle-bearing lubrication and temperature control

摘要

A rotorcraft is disclosed. The rotorcraft may include an airframe, at least one engine connected to the airframe, and a rotor connected to the airframe. The rotor may include a hub, a rotor blade, and a feathering spindle connecting the rotor blade to the hub. The rotorcraft may further include a flow of oil passing proximate the feathering spindle. The flow of oil may cool the feathering spindle during take off and landing of the rotorcraft. Additionally, the flow of oil may heat the feathering spindle during travel of the rotorcraft at altitude.

主权项

1. A rotorcraft comprising:
an airframe; at least one engine connected to the airframe; a rotor connected to the airframe and defining axial and radial directions, the rotor comprising
a hub,a rotor blade having a root and a tip and forming a conduit extending from the root to the tip, anda feathering spindle connecting the rotor blade to the hub; a flow of oil passing proximate the feathering spindle; the flow of oil cooling the feathering spindle during take off and landing of the rotorcraft; and the flow of oil heating the feathering spindle during travel of the rotorcraft during flight at flight travel altitudes; wherein the feathering spindle defines an interior cavity extending in the radial direction therethrough; and wherein the feathering spindle receives and retains the root of the rotor blade within the interior cavity.