Sight tube assembly and sensing instrument for controlling a gas turbine
This patent describes in combination, a sight tube assembly and an optical pyrometer, for controlling the firing temperature of a gas turbine, which comprises: an optical pyrometer unit that includes a first tubular member extending from the pyrometer unit, the first tubular member defining a coupler neck having an open end; a valve having open and closed positions, the valve having a first end and a second end, the first end being connected to the open end of the pyrometer coupler neck; a transparent member that serves as a sight glass, the sight glass being positioned between the pyrometer coupler neck and the first end of the valve member; a second tubular member that defines a nozzle, the nozzle having a first end fastened to a casing member of the turbine, the nozzle having a second end fastened to the second end of the valve; a sight tube that fits inside the nozzle, the sight tube having a first end and a second end, the first end of the sight tube being positioned between the second end of the valve and the second end of the nozzle. The second end of the sight tube extends into the wall of a hot gas duct member on the turbine, and the outside diameter of the sight tube smaller than the inside diameter of the nozzle, such that an annulus is defined between the sight tube and the nozzle; and a turbine section in the gas turbine that includes several rows of stationary guide vanes and several rows of rotating turbine blades.
- Assignee:
- Dow Chemical Co., Midland, MI
- Patent Number(s):
- US 4648711
- OSTI ID:
- 6662387
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
421000* -- Engineering-- Combustion Systems
COMBUSTION CONTROL
CONTROL
CONTROL EQUIPMENT
DUCTS
EQUIPMENT
FLOW REGULATORS
GAS TURBINES
MACHINERY
MEASURING INSTRUMENTS
NOZZLES
OPACITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PYROMETERS
TEMPERATURE CONTROL
TUBES
TURBINE BLADES
TURBINES
TURBOMACHINERY
VALVES