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The lubrication of gears connected to turbines is of interest to the personnel of Technical Committee C on Turbine Oils of A.S.T.M. Committee D-2 on Petroleum Products and Lubricants because of the necessity to use the same oil for lubricating the turbine. The personnel of Technical Committee C desired a symposium on the subject of the lubrication of turbine driven gears in order that they would better understand the lubrication problems connected with gears. The lubrication of turbine driven gears and worm gears which are used in turbines is of vital importance to the manufacturer, the refiner, and the customer. The advances which have been made during the last 10 to 15 years in inhibiting oils with rust and oxidation inhibitors for the lubrication of turbine geared sets have gone a long way in improving the service life of the sets and in minimizing the length of repair time during an inspection period. This has been brought about due to minimizing the rusting problem and in practically eliminating sludge formation. Although the oils which have been developed during this period of time are not a cure-all for all difficulties, they have proven exceedingly successful where proper care has been taken in the operation of the lubricating system on these sets. Further developments in the accuracy of the machining of gear teeth have improved the operation of turbine geared sets. The authors who have contributed papers to this symposium have given us a very clear picture of the operating problems, the design problems, and what has been accomplished in perfecting the gears and lubricating systems in bringing about the tremendous improvements in our geared sets and the possible improvements yet to be realized.
Linn, F. C.
Chairman of Technical Committee C, General Electric Co., Schenectady, N. Y.