Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1998-07-15
2000-03-14
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25022711, 25055914, 73660, G01J 104, G01D 534
Patent
active
060375817
ABSTRACT:
A turbine configuration includes a turbine shaft having a surface, and/or turbine blades fastened to the turbine shaft and having surfaces, and a turbine casing surrounding the turbine blades. When the turbine is in operation, a radial gap occurring between the turbine casing and the turbine shaft or between the turbine casing and a turbine blade is monitored. A device for recording a change in position at the turbine configuration includes a glass fiber probe led through the turbine casing, a measurement reference point applied to the surface of at least one turbine blade and/or to the surface of the turbine shaft and formed of nonoxidizing material, for reflecting light from the glass fiber probe, a device for recording differences in intensity in the reflected light, and a device for comparing a difference in intensity with a reference value determined at a previous time.
REFERENCES:
patent: 3327584 (1967-06-01), Kissinger
patent: 4049644 (1977-09-01), Wennerstrom
patent: 4701053 (1987-10-01), Ikenaga
patent: 4701610 (1987-10-01), Hoogenboom
patent: 5557099 (1996-09-01), Zielinski et al.
International Publication No. WO 93/17296 (Sweeney et al.) , dated Sep. 2, 1993.
"High Temperature Alloys for Gas Turbines", Proceeedings of a Conference, Oct. 4-6, 1982;
"Fiber-Optic Lateral-Displacement Sensor", 2301 N.T.I.S. Tech Notes, Feb. 1988.
Greenberg Laurence A.
Lerner Herbert L.
Pyo Kevin
Siemens Aktiengesellschaft
Westin Edward P.
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