Turbine blade shroud clearance monitor

Details Turbine blade shroud clearance monitor Turbine blade shroud clearance monitor

1988-11-30

1991-01-22

Chin, Gary

Boots, shoes, and leggings

364508, 32420711, G01B 714

Patent

active

049875558

ABSTRACT:
A system for monitoring the clearance between a plurality of turbine blade shroud segments connected to form a turbine blade shroud and the stationary portion of the turbine comprises a sensor responsive to eddy currents generated in each of the shroud segments for producing input signals representative of the clearance between each shroud segment and the stationary portion of the turbine. Indicia are carried by the turbine blade shroud for causing the sensor to produce a known displacement signal. A processor is responsive to the input signals and the displacement signal for producing output signals indicative of the clearance between each shroud segment and the stationary portion of the turbine. The output signals have a predetermined relationship to the known displacement signal.

REFERENCES:
patent: 3034043 (1962-05-01), Dega
patent: 3707671 (1972-12-01), Marrow et al.
patent: 3929008 (1975-12-01), Zlotin et al.
patent: 4173869 (1979-11-01), Martin, Jr. et al.
patent: 4518917 (1985-05-01), Oates et al.
patent: 4596952 (1986-06-01), Goff et al.
patent: 4795278 (1989-01-01), Hayashi
patent: 4797611 (1989-01-01), Schrieber

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