Seal and seal arrangement for confining leakage flows between adjacent components of turbo-machines and gas turbines
First Claim
1. A seal for stemming leakage flows between adjacent components of turbomachines, the seal comprising:
- an elongated, thin-walled sealing element which is elastically deformable in at least one transverse direction and in cross section has the shape of a bent band;
an elongated, thin-walled cover element having a U-shaped cross section, the U-shape having legs and a base, the legs and the base delimiting a recess in which the sealing element is positioned, wherein;
the sealing element has a relaxed state in which a portion of the sealing element is outside said recess;
the sealing element has a cross sectional shape of a repeatedly bent band which has a plurality of consecutive bends with alternating bend directions; and
each bend is the cross-sectional shape of an associated bent wall section of the sealing element;
the sealing element includes a plurality of transversely extending wall sections;
the sealing element has two adjacent rows of consecutive bent wall sections, two consecutive bent wall sections of each row are connected by one transversely extending wall section, and in each row all the transversely extending wall sections intersect a common center plane;
the two adjacent rows each define a center plane, the center planes being parallel to each other; and
the seal further comprises a thin-walled cover strip which has a band-like cross section and extends between two of said wall sections, both rows of the bent wall sections being connected by the cover strip, and the cover strip has at least one convex surface region oriented away from the recess configured and arranged to at least partially bear against a sealing surface of the other component.
3 Assignments
0 Petitions
Accused Products
Abstract
A seal for stemming leakage flows between adjacent components, especially of a gas turbine, has an elastically deformable, thin-walled sealing element and a thin-walled cover element which is U-shaped in cross section and between its legs and its base partially accommodates the sealing element. The legs of the cover element are arranged in the sealing arrangement, which features the seal, between two oppositely disposed walls of the other component in a movable manner relative to these walls which, together with the sealing surface of the other component, form a groove which is U-shaped in cross section. Forces, which act laterally upon the seal, are absorbed by the cover element and via the legs are diverted into the other component so that the integrity of the seal is maintained even in the case of lateral forces.
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Citations
17 Claims
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1. A seal for stemming leakage flows between adjacent components of turbomachines, the seal comprising:
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an elongated, thin-walled sealing element which is elastically deformable in at least one transverse direction and in cross section has the shape of a bent band; an elongated, thin-walled cover element having a U-shaped cross section, the U-shape having legs and a base, the legs and the base delimiting a recess in which the sealing element is positioned, wherein; the sealing element has a relaxed state in which a portion of the sealing element is outside said recess; the sealing element has a cross sectional shape of a repeatedly bent band which has a plurality of consecutive bends with alternating bend directions; and each bend is the cross-sectional shape of an associated bent wall section of the sealing element; the sealing element includes a plurality of transversely extending wall sections; the sealing element has two adjacent rows of consecutive bent wall sections, two consecutive bent wall sections of each row are connected by one transversely extending wall section, and in each row all the transversely extending wall sections intersect a common center plane; the two adjacent rows each define a center plane, the center planes being parallel to each other; and the seal further comprises a thin-walled cover strip which has a band-like cross section and extends between two of said wall sections, both rows of the bent wall sections being connected by the cover strip, and the cover strip has at least one convex surface region oriented away from the recess configured and arranged to at least partially bear against a sealing surface of the other component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 17)
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12. A sealing arrangement for stemming leakage flows between adjacent components of turbomachines, the sealing arrangement comprising:
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first and second adjacent components of a turbomachine each having a wall, the walls together delimiting a space, each of said walls defining one of two oppositely disposed sealing surfaces; wherein a first component of said two adjacent components comprises two oppositely disposed walls, said oppositely disposed walls forming a U-shaped groove with the wall of the second component; a seal having an elongated, thin-walled sealing element which is elastically deformable in at least one transverse direction and having a cross sectional shape of a bent band; wherein the seal is arranged in the space in a pretensioned manner in the at least one transverse direction in such a way that the at least one transverse direction extends perpendicularly to the two oppositely disposed sealing surfaces; an elongated, thin-walled cover element, the cover element being U-shaped in cross section, the U-shape comprising two legs, a base, and a recess between the legs and the base in which the sealing element is positioned; wherein, in a relaxed state of the sealing element, a portion of the sealing element is outside of the recess;
wherein the two legs are arranged between the two oppositely disposed walls of the first component, the two legs being movable relative to the two oppositely disposed walls,wherein the space delimited by the walls of the two components is part of a gap which extends between the two components and comprises at least two spaced-apart outlets between which the seal is positioned, wherein one of the gap outlets is in communication with a region which contains high-pressure fluid and the other gap outlet is in communication with a region which contains low-pressure fluid;
at least one portion of the outer surface of the cover element base is exposed to low-pressure fluid and at least one portion of the inner surface of the cover element base is exposed to high-pressure fluid, andwherein the difference in pressure between the low-pressure fluid and the high-pressure fluid creating a force which acts upon the cover element to press the cover element against the sealing surface of the second component. - View Dependent Claims (13, 14, 15, 16)
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Specification