| Problem to be solved: |
Preload a variable high speed geometry turbocharger, high temperature |
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| Constraints: |
Austere environment, stresses in dynamic, very high temperature variations (thermal cycling from -40°C to +790°C), very small space available, high energy levels. |
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| Solution: |
Study and design of a Belleville type spring washers stacking made in a Nickel base super alloy Inconel type with optimization of the points of stress concentration to guarantee a place in operation without slackening or failure. |
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| Borrelly added value: |
A manufacturing process which enables to increase deflections and loads in elastic deformation range at high temperatures. Qualification in environmental chamber. |
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