Generator sealing oil temperature control method and apparatus utilizing temperature matching
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United States of America Patent
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Feb 16, 1993
Issued Date -
N/A
app pub date -
Mar 6, 1992
filing date -
Jan 28, 1991
priority date (Note) -
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Abstract
A system for providing seal oils to a gland seal that surrounds the shaft of a generator with the temperature differences between the oils minimized, as well maintained at a temperature which is greater than that for a bearing lubrication oil supply system. The temperature of the air-side seal oil is used as a reference and then the difference between the air- and hydrogen-side seal oil temperatures is used to control the hydrogen-side seal oil temperature. The air-side temperature is controlled by a separate controller using the bearing oil temperature as a reference. The system advantageously prevents thermal differential expansion from occurring in the generator shaft and gland seal, and eliminates the need for operator attention for seal oil temperature control.
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