Principles of naval engineering - Historic Naval Ships Association

Chapter 5- FUNDAMENTALS OF SHIP PROPULSION AND STEERING2ND REDUCTIONPINION1ST REDUCTION1ST REDUCTIONGEAR2ND REDUCTIONOR MAIN GEAR1ST REDUCTION GEAR| p. pinionmm1ST REDUCTION GEAR L.P. PINIONREDUCTION1ST REDUCTION GEAR1ST REDUCTION GEARFigure 5-20.— Nested reduction gearing.49.29Xthis type which is used on destroyers. Thecoupling is installed between the cruisingturbinereduction gear and the high pressure turbine.In this coupling, the floating member isatransverselysplit sleeve having internal teeth whichmesh completely with the external teeth of thespur gears mounted on the connected shaft ends.CARE OF REDUCTION GEARS,SHAFTING AND BEARINGSThe main reduction gear is one of the largestand most expensive units of machinery found inthe engineering department. Main reductiongears that are installed properly and operated103