Pump 1 delivers hydraulic fluid under pressure, maintained constant by relief valve 2, to common chamber A and further through pipelines to servomotors 3, 4 and 5. Mounted in the pipelines are throttle valves 6, 7 and 8, each linked to a regulating device. Regulating devices 9, 10 and 11 control the speed of the turbine shaft and the pressures at the steam bleeding units. Each regulating device actuates all the servomotors. Upon a drop in turbine shaft speed, the sleeve of centrifugal governor 9 moves downward together with throttle valve 6, increasing the amount of fluid admitted into servomotor 3. This raises the pressure in the lower chamber of servomotor 3, moving its piston upward and opening shutter 12 to increase the supply of steam admitted into the system and, therefore, the speed of the turbine shaft. Shutters 13 and 14 are opened in a similar manner. Upon an increase in turbine shaft speed, the elements of the regulator operate in the reverse direction. Upon a change in pressure in the first extraction chamber, connected to regulating device 10, shutter 12 moves in the direction opposite to that of shutters 13 and 14. This is accomplished by the difference in the effective areas of the servomotor pistons. Upon a change in pressure in the second extraction chamber, connected to regulating device 11, shutters 12 and 13 move in the direction opposite to that of shutter 14, as is required by the regulating conditions.
$4235$CHP,Rg$