Ventilated aerodynamic foil bearing

摘要

The aerodynamic foil bearing in the form of a radial or axial thrust bearing, includes a rotor and a stator including a support designed to support, facing the rotor, a lift device including: a plurality of evenly distributed elastic foils fixed by a fixing edge to a surface of the lift device facing the rotor; rows of ventilation orifices passing through the lift device and opening between a free edge of each elastic foil and the fixing edge of the next foil, wherein the support includes a cavity having grooves extending under the rows of ventilation orifices and at least one circular groove intersecting the grooves and supplied with a stream of pressurized cooling gas to distribute same so as to cool the underside of each foil and provide a supply of fresh gas above the next foil to compensate for gas losses at the ends of the bearing.

主权项

1. Aerodynamic foil bearing (1, 1′), comprising a rotor (2), that is rotationally mobile about an axis, and a fixed stator (3), said stator comprising a support (4), adapted to support, facing said rotor, a lift device (5), said lift device comprising:
a plurality of evenly distributed resilient foils (6), extending over a circular sector and fixed via a fixing edge (7), on a surface of said lift device facing said rotor; rows of ventilation holes (13), passing through said lift device (5) from a face facing said support (4) up to another face bearing said resilient foils, said ventilation holes substantially emerging between a trailing edge (8), of each resilient foil (6) opposite the fixing edge (7) thereof and the fixing edge (7) of the next foil, wherein said support (4) comprises a cavity (10) having grooves (11, 11′) extending under said rows of ventilation holes (13) and at least one circular groove (12) intersecting said grooves, said circular groove being adapted to be supplied by a flow of pressurized cooling gas and to distribute said gas in order to balance the gas pressure inside said grooves in order to cool an inner face of each foil (6) and to provide a supply of fresh gas above the next foil (6) to compensate for gas losses at the ends of said bearing.