Principles of naval engineering - Historic Naval Ships Association

Chapter 16. -AUXILIARY STEAM TURBINES--GOVERNORHIGH SPEED SHAFT(.DRIVEN BY TURBINE)OIL COOLEROIL FLOW INDICATORV^ ^'/ ^OIL FILTERFigure 16-8, — Isometric diagram of pressure lubrication system.38.97Xconstant- speed machines to maintain a constantspeed regardless of the load on the turbine.Constant- speed governors are used primarily ongenerator turbines and on air compressor turbines.A constant- speed governing system for aship's service generator turbine is shown in figure16-9. The constant-speed governor operatesa pilot valve which controls the flow of oil to anoperating cylinder. The operating cylinder, inturn, controls the extent of the opening or closingof the turbine nozzle valves.With an increased load on the generator, theturbine tends to slow down. Since the governoris driven by the turbine shaft, through reduction429