Lever 15 turns about fixed axis A and is connected by turning pairs B and D to links 18 and 16, which are connected by turning pairs C and F to gate valve member 9 and to the rod of piston 8. Lever 17 turns about fixed axis F and is connected by turning pair R to link 20 which, in turn, is connected by turning pair L to the cylinder of cataract 10. Lever 13 turns about fixed axis K and is connected by turning pairs M and P to links 21 and 19. Link 21 is connected by turning pair N to the rod of cataract piston 11, and link 19 by a turning pair to the body of valve 6. Spring 12 is connected at points M and T to levers 13 and 17. Gear pump 1 delivers fluid under pressure to centrifugal pump 2 which is linked to the shaft whose speed is to be regulated. The pipeline to pump 2 is also connected to valve 6 and to chamber 4 of bellows 5. Upon an increase in speed of the shaft being regulated, the impeller of pump 2 rotates faster and increases the pressure of the fluid inside bellows 5, which stretches, raising valve spool 3. At this, fluid from the valve is directed to the upper end of servomotor 7, moving piston 8 downward. This lowers valve member 9, reducing the amount of heat-carrying agent supplied to the system. Moved downward together with piston 8 are the cylinder of cataract 10 and, due to the pressure of the fluid in it, piston 11, compressing spring 12. At this, lever 13 raises the body of valve 6 so that its ports are blocked off by spool 3, stopping the fluid delivery to servomotor 7. Then, compressed spring 12 moves piston 11 slowly upward, the fluid from the upper end being throttled as it passes through flow-control valve 14 to the lower end of the cataract. This lowers the body of valve 6 again and an additional amount of fluid is delivered to servomotor 7, lowering valve member 9 somewhat more. This regulating process continues until the elements of the regulator return to the initial position. Upon a decrease in speed of the shaft being regulated, the elements of the regulator operate in the reverse direction.
$4257$CHP,Rg$