Chapter 5- FUNDAMENTALS OF SHIP PROPULSION AND STEERING 



2ND REDUCTION 

 PINION 



1ST REDUCTION 



1ST REDUCTION 

 GEAR 



2ND REDUCTION 



OR MAIN GEAR 



1ST REDUCTION GEAR | p. pinion 



mm 



1ST REDUCTION GEAR 



1ST REDUCTION GEAR 



L.P. PINION 



1ST REDUCTION GEAR 



Figure 5-20.— Nested reduction gearing. 



REDUCTION 



49.29X 



this type which is used on destroyers. The 

 coupling is installed between the cruisingturbine 

 reduction gear and the high pressure turbine. 

 In this coupling, the floating member isatrans- 

 versely split sleeve having internal teeth which 

 mesh completely with the external teeth of the 

 spur gears mounted on the connected shaft ends. 



CARE OF REDUCTION GEARS, 

 SHAFTING AND BEARINGS 



The main reduction gear is one of the largest 

 and most expensive units of machinery found in 

 the engineering department. Main reduction 

 gears that are installed properly and operated 



103 



