Layered seal for turbomachinery

摘要

The present application provides seal assemblies for reducing leakages between adjacent components of turbomachinery. The seal assemblies may include outer shims, and at least a portion of the outer shims may be substantially impervious. At least one of the outer shims may be configured for sealing engagement with seal slots of the adjacent components. The seal assemblies may also include at least one of an inner shim and a filler layer positioned between the outer shims. The at least one inner shim may be substantially solid and the at least one filler layer may be relatively porous. The seal assemblies may be sufficiently flexible to account for misalignment between the adjacent components, sufficiently stiff to meet assembly requirements, and sufficiently robust to operating meet requirements associated with turbomachinery.

主权项

1. A seal assembly for sealing a gap between adjacent turbomachinery components, the assembly including:
a first outer shim; and a second outer shim; wherein the first and second outer shim are operably coupled; wherein at least one of the first and second outer shims includes at least one substantially impervious portion configured to span across the gap and engage each of the adjacent turbomachinery components to substantially seal the gap therebetween; wherein the seal assembly includes at least first and second filler layers; wherein the first and second filler layers are operably coupled to the first and second outer shims by at least two welds; and wherein the at least two welds include a first weld that directly couples the at least two filler layers to one another, and a second weld that is weaker than the first weld that directly couples the first outer shim and the first filler layer and directly couples the second outer shim and the second filler layer.