Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part
Patent
1996-10-21
1998-01-06
Kwon, John T.
Rotary kinetic fluid motors or pumps
Bearing, seal, or liner between runner portion and static part
415200, F01D 500
Patent
active
057047596
ABSTRACT:
For use in a compressor unit of gas turbine engine, a blade having a tip portion. An abrasive portion is formed on the tip portion with the abrasive portion comprising a dispersion of discrete particles of cubic boron nitride disposed on the tip portion. A shroud is coated with a porous ceramic abradable material based on preferably 8% yttria-stabilized zirconia. The abrasive portion of the tip portion contacts the abradable material. In the preferred embodiment, the abradable material is treated with boron nitride composited polyester that is burned out of the material via thermal exposure to thereby improve porosity within the abradable material.
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Draskovich Barry S.
Frani Norman E.
Joseph Stephen S.
Narasimhan Dave
Allied-Signal Inc.
Kwon John T.
McFarland James W.
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