Method and apparatus for improved turbine bellyband rotor seal machining, installation and life
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United States of America Patent
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Mar 1, 2016
Grant Date -
Jan 28, 2016
app pub date -
Jul 22, 2014
filing date -
Jul 22, 2014
priority date (Note) -
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Abstract
A method and apparatus for improved turbine bellyband rotor seal machining, installation and life are disclosed. A fixture is provided which can be temporarily attached to the turbine disks in a position straddling the gap between the disks, without destacking the turbine rotor. The fixture accepts power tools including a drill and a mill, and positions the power tools to drill and grind a rectangular slot into the disks, where the slot has the exact size and shape needed to receive an anti-rotation block which is integral to the replacement bellyband. Measuring tools are also provided which enable precise location of each of the four slots which must be machined in the disks. The resulting slots have a uniform size and shape, and are equally spaced around the circumference of the disk, thereby facilitating installation of the service bellyband from four identical segments.
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