Device for testing the coating of a vane base

Details Device for testing the coating of a vane base Device for testing the coating of a vane base

G - Physics

01

N

G01N 3/56 (2006.01)

Patent

CA 2716242

The invention relates to a device (10) for testing the coating (36) of a vane base in a turbine engine rotor, which includes two semi-specimens (32) each having a bearing surface (24) covered with the coating, a check specimen having two bearing surfaces, and a machine including a first holding system (20) for the check specimen (22) and a second holding system (30) for holding the semi-specimens (32) around the check specimen. A pulling means (14) is used for subjecting the holding systems to predetermined pulling cycles along the pulling axis, during which the pulling force is transmitted from one holding system to the other via the respective contacted bearing surfaces of the check specimen (22) and of the semi-specimens (32). The second holding system includes an elastic return means (40) used for spacing apart the two semi-specimens in a direction perpendicular to the pulling direction.

Dispositif (10) pour tester un revêtement (36) pour pied d'aube de rotor de turbomachine, comprenant deux demi-éprouvettes (32), chacune présentant une portée (24) revêtue du revêtement, une contre-éprouvette présentant deux portées, et une machine comportant un premier système de maintien (20) pour la contre-éprouvette (22) et un second système de maintien (30) pour maintenir les demi-éprouvettes (32) autour de la contre-éprouvette. Grâce à des moyens de traction (14), on soumet les systèmes de maintien à des cycles de traction prédéterminés suivant l'axe de traction, pendant lesquels l'effort de traction est transmis d'un système de maintien à l'autre via les portées respectives en contact de la contre-éprouvette (22) et des demi-éprouvettes (32). Le second système de maintien comporte des moyens (40) de rappel élastique autorisant l'écartement des deux demi-éprouvettes dans une direction perpendiculaire à la direction de traction.

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