Measuring and testing – Vibration – Sensing apparatus
Patent
1988-03-24
1990-03-13
Levy, Stewart J.
Measuring and testing
Vibration
Sensing apparatus
738665, G01H 1100
Patent
active
049074563
ABSTRACT:
This invention relates to a method for measuring vibration in turbine blades and to an apparatus for mounting a sensing device for monitoring blade tip vibration in turbo-machinery. A guide tube is mounted through the cylinder covers of a turbine and extends to a position adjacent to the tip of the turbine blades. The guide tube is sealed at the cylinder covers and has a gate valve external of the turbine cylinder covers. A method for measuring vibration and turbine blades while the turbine is in full operation includes the steps of removing a dummy probe partially from the guide tube while the turbine is in operation. With the dummy probe still in a portion of the guide tube, the gate valve is closed. Once the gate valve is closed, the dummy sensor probe is completely removed from the guide tube and a vibration sensor probe is inserted into the guide tube opening, then the gate valve is opened for sliding the vibration sensor probe into the guide tube until a shoulder on the vibration sensor probe is positioned against an alignment shoulder at the end of the guide tube. The vibration sensor then measures vibrations of the turbine blades during the operation of the turbine.
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Abeles D. C.
Arana Louis M.
Levy Stewart J.
Westinghouse Electric Corp.
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