Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part – Between blade edge and static part
Reexamination Certificate
2005-10-14
2008-09-16
Kershteyn, Igor (Department: 3745)
Rotary kinetic fluid motors or pumps
Bearing, seal, or liner between runner portion and static part
Between blade edge and static part
C415S173600, C415S174400, C415S200000, C416S224000, C416S22900R, C416S24100B
Reexamination Certificate
active
07425115
ABSTRACT:
A thermal turbomachine is disclosed having at least one row of rotor blades. At least one first rotor blade has a greater radial length than the others and at the blade tip is equipped with a first abrasive layer. At least one rotor blade which has a shorter radial length than the first rotor blade is equipped with a second abrasive layer at the blade tip. The first abrasive layer has a better cutting capacity and a lower thermal stability than the second abrasive layer. During commissioning of the thermal turbomachine, the first abrasive layer is in contact with the abradable layer of the stator, and during continuous operation of the thermal turbomachine the second abrasive layer is in contact with the abradable layer of the stator.
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Hoebel Matthias
Hurter Jonas
Johnson Nicolas Campino
Niederberger Christoph
Alstom Technology Ltd
Buchanan & Ingersoll & Rooney PC
Kershteyn Igor
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