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US 8,647,011 B2Granted
Engine shaft of hybrid design
AssigneeRolls-Royce Deutschland Ltd & Co KG
InventorKarl Schreiber
Life of this patent
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Abstract
On an engine shaft of hybrid design with an externally toothed power transmission element connected at the ends of a fiber-composite plastic tube, the power transmission element is of a two-part design and includes a toothed part made of steel of a specific hardness and, frontally weldedly connected thereto, a tapering adapter part enclosed by a fiber-composite material to form a scarf-type joint and having a thermal expansion approximately equal to the expansion behavior of the fiber-composite material.
Claims18
An engine shaft of hybrid design, comprising:
- a power transmission element having:
- an externally toothed part at least partly made of a hardened steel for engaging a corresponding toothed part of a further engine shaft;
- and
- a metal adapter part made of a different metal than the toothed part and welded to the toothed part, the adapter part having a decreasing diameter as it extends away from the toothed part;
- a tube of fiber-composite material connected at one end with the adapter part such that the fiber-composite material encompasses the adapter part to form an overlapping joint;
- wherein, the adapter part has a thermal expansion approximately equal to an expansion behavior of the fiber-composite material.
3 more elements
Dependencies are inferred from the claim text.