Sealing arrangement for a thermal machine

摘要

A sealing arrangement for sealing a gap (22) between two adjacent, thermally loaded components (14, 14′) of a thermal machine, especially a turbomachine or gas turbine, includes a seal (25) which is supported in a recess (23) which extends transversely to the gap (22) and traverses said gap (22). An efficient and simple improvement of the sealing arrangement is made by the seal (25) being formed at least partially of a shape memory alloy in such a way that, when a pre-specified temperature limit is exceeded, the seal changes its sealing behavior.

主权项

1. A sealing arrangement for sealing a gap, the sealing arrangement comprising:
a thermal machine including two adjacent, thermally and/or mechanically loaded components, and a gap between the two components; a recess which extends transversely to and traverses the gap; a seal supported in the recess, the seal formed at least partially of a shape memory alloy and being configured and arranged so that, when a pre-specified temperature limit is exceeded, the seal changes a sealing behavior in the recess; and wherein the seal comprises at least one first element supported in the recess which extends transversely to the gap, and at least one second element which extends along the gap perpendicularly to the first element and at least the at least one second element is formed of a shape memory alloy.