Part of a turbomachine comprising a washer cooperating with a counterbore
AssigneeSafran Aircraft Engines
InventorsRomain Nicolas Lagarde, Marie-Charline Stephanie Charbonnier, Jean-Marc Claude Perrollaz
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Abstract
The invention concerns a part of a turbomachine, including an element having a first aerodynamic surface including a counterbore at the bottom of which is provided a mounting hole of a fastening screw of the part, and a washer configured to be accommodate into the counterbore and intended to serve as a support for a head of the fastening screw, wherein the washer has an asymmetry of revolution about a screwing axis and is engaged by shape complementarity in the counterbore, and in that the washer includes a second aerodynamic surface extending in the continuity of the first surface.
Claims19
A part of a turbomachine comprising:
- an element having a first aerodynamic surface and comprising a counterbore, said counterbore comprising an upper end and a bottom end, said upper end opening on said first aerodynamic surface and said bottom end forming a mounting hole,
- a fastening screw having a head and a threaded rod, said head being received into said upper end and said threaded rod passing through said mounting hole, said fastening screw having a screwing axis which extends in a first direction, and
- a washer accommodated into said upper end of said counterbore and forming a support for said head of said fastening screw, said washer having a first cross sectional oblong shape in a plane perpendicular to said screwing axis and said upper end of the counterbore having a second cross sectional oblong shape in a plane perpendicular to said screwing axis, said first and second cross sectional oblong shapes being complementary, and said washer having a second aerodynamic surface which is aligned with said first aerodynamic surface, and
- wherein said washer is asymmetric about said screwing axis,
- said washer forms a strut around the fastening screw separating, along a mounting axis of the fastening screw, a first end on the bottom end of the counterbore and a second end comprising said second aerodynamic surface,
- the first and second ends of the washer are interconnected on a first side of the washer,
- the first and second ends of the washer are separated from each other on a second side of the washer which is opposite to the first side, and
- the first and second sides extend in the first direction.
A part of a turbomachine comprising:
- an element having a first aerodynamic surface and comprising a counterbore, said counterbore comprising an upper end and a bottom end, said upper end opening on said first aerodynamic surface and said bottom end forming a mounting hole,
- a fastening screw having a head and a threaded rod, said head being received into said upper end and said threaded rod passing through said mounting hole, said fastening screw having a screwing axis which extends in a first direction, and
- a washer accommodated into said upper end of said counterbore and forming a support for said head of said fastening screw, said washer having a first cross sectional oblong shape in a plane perpendicular to said screwing axis and said upper end of the counterbore having a second cross sectional oblong shape in a plane perpendicular to said screwing axis, said first and second cross sectional oblong shapes being complementary, and said washer having a second aerodynamic surface which is aligned with said first aerodynamic surface, and
- wherein said washer is asymmetric about said screwing axis,
- said washer forms a strut around the fastening screw separating, along a mounting axis of the fastening screw, a first end on the bottom end of the counterbore and a second end comprising said second aerodynamic surface, and
- wherein said second end of the strut comprises a supporting frustoconical inner surface for the head of the fastening screw.
Dependencies are inferred from the claim text.