System for attaching two rotating parts made of materials having different expansion coefficients
AssigneeSnecma
InventorMarcel R. Soligny
Life of this patent
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Abstract
A system is disclosed for attaching a cap of composite material to the exhaust housing of a turbojet. The system consists of three triangular rod assemblies arranged between the housing and the cap. The triangular rod assemblies bear at their ends eyelets pivotally connected to brackets attached to the housing. The connecting rods are connected to the brackets by means of pivot pins, and to the cap by an attachment part and pivots. The attachment part is fixed to the cap by a bolt. The housing and the cap have cooperating bearing surfaces as well as a seal device.
Claims11
An apparatus for attaching an inner exhaust cap formed of a composite material to a metal exhaust housing of a turbojet, said apparatus comprising:
- a first cylindrical bearing surface on a radially inner surface of said exhaust housing;
- a second cylindrical bearing surface on a radially outer surface of said cap and in cooperating surface contact with said first bearing surface;
- at least three rod assemblies circumferentially spaced from one another at positions radially within said cylindrical bearing surfaces;
- first attachment means fixed to said housing;
- second attachment means fixed to said cap;
- and
- pivot means for pivotally connecting respective ends of said rod assemblies to said first and second attachment means, whereby both radial and axial differential thermal expansions of said housing and said cap are compensated for.
Dependencies are inferred from the claim text.