Chapter 16. -AUXILIARY STEAM TURBINES 



--GOVERNOR 



HIGH SPEED SHAFT 

 (.DRIVEN BY TURBINE) 



OIL COOLER 



OIL FLOW INDICATOR 



V^ ^'/ ^OIL FILTER 



Figure 16-8, — Isometric diagram of pressure lubrication system. 



38.97X 



constant- speed machines to maintain a constant 

 speed regardless of the load on the turbine. 

 Constant- speed governors are used primarily on 

 generator turbines and on air compressor tur- 

 bines. 



A constant- speed governing system for a 

 ship's service generator turbine is shown in fig- 

 ure 16-9. The constant-speed governor operates 



a pilot valve which controls the flow of oil to an 

 operating cylinder. The operating cylinder, in 

 turn, controls the extent of the opening or clos- 

 ing of the turbine nozzle valves. 



With an increased load on the generator, the 

 turbine tends to slow down. Since the governor 

 is driven by the turbine shaft, through reduction 



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