. Steam engines, a thorough and practical presentation of modern steam engine practice . bearings at the top and flows out at each end, where it dropsdown into chambers in the turbine casing and is collected by the 170 STEAM ENGINES pipe J and returned to the reservoir B. A screen K is providedin the reservoir which removes any large particles of foreign such a system there are several places where water findsits way into the oil, the principal place being at the packing glandM at the high-pressure end of the turbine casing. Differentmanufacturers use different forms of packings at t
. Steam engines, a thorough and practical presentation of modern steam engine practice . bearings at the top and flows out at each end, where it dropsdown into chambers in the turbine casing and is collected by the 170 STEAM ENGINES pipe J and returned to the reservoir B. A screen K is providedin the reservoir which removes any large particles of foreign such a system there are several places where water findsits way into the oil, the principal place being at the packing glandM at the high-pressure end of the turbine casing. Differentmanufacturers use different forms of packings at this point, butin practically every case some steam escapes which, on coming incontact with the water-cooled bearing at E, condenses and mixeswith the oil. Again, when turbines are operated with a backpressure, there will be a leakage of condensed steam into the oilat the packing gland A, at the exhaust end of the casing. Also theoil cooler C and the water-cooled bearings may develop small Fig. 101 Section of Modern Steam Turbine, Showing Scheme of Operation of Self- Contained Oil Circulating System As a means of getting rid of the water which gets into thesystem, the cock P is provided at the bottom of the reservoir B,from which water collecting at this point can be drawn off. Theoil usually passes through this tank so rapidly that .there is notsufficient time for complete separation of the entrained water What has been said concerning the lubrication of largesteam turbines applies equally as well to the lubrication oflarge steam engines. In Figs. 102 and 103 is shown the plan of operation of a powerplant oil filter with the various parts named. Starting the Engine. Before starting an engine, the oil cupsshould be started feeding, grease cups screwed down, and the gov- STEAM ENGINES 171 ernor and other parts of the valve gear oiled. The cyhnder lubri-cator should be started before the engine so that the oil passageswill contain oil. The cylinder drain cocks should be o
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectsteamen, bookyear1920
