Electrode structure for a high temperature capacitance probe for

Details Electrode structure for a high temperature capacitance probe for Electrode structure for a high temperature capacitance probe for

1980-04-03

1982-05-11

Strecker, Gerard R.

Electricity: measuring and testing

Electrical speed measuring

324 61P, 324166, G01P 3483, G01R 2726, G01R 106

Patent

active

043296440

ABSTRACT:
A probe is constructed for placement in the hot turbine section of a gas turbine engine. A housing containing two electrodes extends through the turbine shroud into the tip clearance area of the turbine rotor. A voltage impressed across the electrodes will generate an electric field in the vicinity of the turbine blades which will be distorted as the blades pass, thereby generating a charge pulse at the output of the probe. The electrode conductors are imbedded in pins which are retained by insulating rings brazed in place. The electrodes extend slightly outward from the surrounding insulating surfaces to create an air gap around each electrode. This air gap provides additional insulation and prevents contamination.

REFERENCES:
patent: 2123812 (1938-07-01), Stevens et al.
patent: 2653298 (1953-09-01), McKinley
patent: 2842738 (1958-07-01), Warnick
patent: 3714012 (1973-01-01), Herron
patent: 4063167 (1977-12-01), Duly

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