Liebherr-Aerospace Toulouse Sas

Centre National De La Recherche Scientifique

Université Paul Sabatier (Toulouse III)

Jerome Rocchi

Gregory Grau

Jean-Pierre Bonino

Yves Maheo

Viviane Turq-Perrussel

Frederic Letrange

Souphiane Rahoui

Jerome Aury

Gwenole Le Jeune

A method for coating a turbomachine part with a self-lubricating includes: providing a rotor or thrust disc of the turbomachine; applying, by a thermal spraying process, a self-lubricating coating having of a mixture of 50 to 90 wt % of alumina (AlO) with titanium oxide (TiO) to a surface of the rotor and/or a surface; and finishing the coated surface of the rotor and/or thrust disc.

Method for coating a turbomachine part with a self-lubricating coating and part coated by said method

A process for manufacturing a part provided with a lubricating surface coating (), in which: a composition is prepared that includes at least one precursor having at least one organic group, the composition is deposited on the part, a heat treatment is carried out, wherein the heat treatment of the coating is carried out at a temperature above 220&#xb0; C., so as to form a lubricating surface coating () formed of an at least partially inorganic solid network incorporating solid carbon in at least one lubricating allotropic form in the dispersed state and trapped within the solid network. A part, such as a foil of a foil bearing () obtained by the process, a turbomachine, such as a turbomachine for a fuel cell, including such a part, and an aircraft cabin air-conditioning system including at least one such turbomachine are also described.

Process for manufacturing a part provided with a lubricating surface coating, part provided with such a coating and turbomachine

A method for producing a corrugated foil bearing stiffener involves starting with an austenitic nickel superalloy sheet () having an elasticity limit higher than 500 MPa, and subjecting the sheet () to at least one step of press bending plastic deformation of the entire thickness of same with a deformation energy higher than 10 kJ in a time shorter than 10s in such a way as to create corrugations.

Method for producing a corrugated foil bearing stiffener and obtained stiffener

This aerodynamic foil bearing has a sleeve () inside which are arranged:

Aerodynamic foil bearing

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.

Growing community of inventors

Roqueseriere, France

Jerome Rocchi