Upon an increase in speed of turbine shaft A and of shaft D, connected to shaft A by worm gearing, the weights of centrifugal governor 1 move outward and its sleeve moves upward, shifting valve spool 2 upward as well. At this, hydraulic fluid delivered by pump 3 to the valve is directed to rotary servomotor 4. The fluid turns servomotor vane 5 together with shaft B, whose axis is perpendicular to the planes of cams 6 and 9. Fluid from the exhaust chamber of the servomotor is discharged through a groove of spool 2 to the tank. As shaft B turns with cam 6, lever 7 turns clockwise, lowering valve member 8. This reduces the supply of steam to the turbine and its shaft speed decreases. Also turned is cam 9, controlling feedback lever 10, which returns valve spool 2 to its central position. Upon a reduction in the speed of the turbine shaft, the elements of the regulator operate in the reverse direction.
$4239$CHP,Rg$