Circumferential gap seal for axial-flow machines
AssigneeMTU Motoren-und Turbinen-Union Munchen GmbH
InventorAxel Rossmann
Life of this patent
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Abstract
Circumferential gap seal for axial-flow machines including a metallic retaining flange mounted within the machine casing and which is connected to a metallic ring through flexible side walls, wherein the side walls, the metallic ring and the retaining flange are subdivided into a plurality of segments in the circumferential direction. The thereby formed radially directed gaps are sealed over the radial height of the side walls through flexible radial walls. The radial height is variable in dependence upon the measured size of the circumferential gap between the tip of the rotor blades of the machine and the metallic ring.
Claims4
Circumferential gap seal for axial-flow machines, comprising a flow machine casing;
- a metallic retaining flange fastened to said casing;
- a metallic ring;
- an abradable contact lining provided on said ring;
- flexible side walls, said metallic ring being connected to said retaining flange through said flexible side walls, said metallic ring forming a circumferential gap with the tips of rotor blades of said machines, said flexible side walls, said metallic ring and said retaining flange being subdivided into a plurality of segments in the circumferential direction thereof;
- a radially directed gap being formed intermediate each said segment;
- flexible radial walls sealing said radial gaps over the radial height of said side walls;
- and sensor means arranged on said metallic ring for varying the radial height as a function of the size of said circumferential gap measured by said sensor means.
Dependencies are inferred from the claim text.