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Profiled surface used as an abradable in flow machines

  • US 6,457,939 B2
  • Filed: 12/19/2000
  • Issued: 10/01/2002
  • Est. Priority Date: 12/20/1999
  • Status: Expired due to Term
First Claim
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1. A profiled surface for use as an abradable in flow machines having blade tips that move in a predetermined direction, the abradable comprising a profiled member including a multiplicity of ribs, each rib extending in a rib direction, the moving blade tips partially removing the abradable to form a partial abraded surface defined by abraded surface strips which extend in the directions of the ribs, the ribs being formed along connection lines between corner points of a reference grid, at least 80% of the abraded surface strips extending in rib directions which differ from the predetermined blade tip movement direction, at least two-thirds of the connection lines and therewith at least two-thirds of the abraded surface strips deviating from the predetermined blade tip movement direction by more than 30°

  • , and wherein ends of the abraded surface strips are one of contiguous with each other and spaced apart from each other.

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