Aerodynamic article with protective coating and method of...

B - Operations – Transporting – 64 – C

Patent

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B64C 11/20 (2006.01) B64C 27/473 (2006.01) C08G 18/83 (2006.01) C09D 175/04 (2006.01) C09J 163/00 (2006.01)

Patent

CA 2440470

To protect an article with an aerodynamic surface, such as an aeroplane propeller or helicotper rotor, from erosive damage caused by flying particulate matter, a thin elastomeric protective covering is provided. This layer covers approximately 15% of a forward face (15), a leading edge (12), and approximately 90% of the rear face (13) of the article. Typically it is made of polyurethane with hardness between 85 Shore A and 80 Shore D. It is applied by centrifugal casting using a silane (eg gammaglycidoxypropyl- trimethoxysilane) as a coupling agent when bonding to a metal surface such as aluminium.

L'invention concerne un revêtement protecteur élastomère mince destiné à protéger un élément à surface aérodynamique (par exemple, une hélice d'avion ou un rotor d'hélicoptère) de l'usure par érosion causée par les particules volantes. Ce revêtement recouvre environ 15 % de la surface avant (15), le bord d'attaque (12), et environ 90 % de la surface arrière (13) de l'élément concerné. Généralement, ce revêtement contient du polyuréthane dont la dureté est comprise entre 85 Shore A et 80 Shore D. Il est appliqué par moulage par centrifugation faisant intervenir un silane (par exemple, un gammaglycidoxypropyl-trimethoxysilane) comme agent de pontage lorsqu'il est déposé sur une surface métallique telle que l'aluminium.

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