| 摘要 |
<p>1,012,600. Fluid-pressure servomator systems. ATELIERS DE CONSTRUCTIONS MECANIQUES DE VEVEY S.A. May 5, 1964 [May 24, 1963], No. 18606/64. Heading G3P [Also in Division F1] A control system for actuating the control members of a double regulation hydraulic turbine, such as Kaplan or Pelton turbine comprises servomotors 10a, 10b connected to the control members, such as a deflector 12a and blades 12b, the pistons 42, 43 of the servomotor being connected by linkage 63, 33, 64. Each servomotor has a control valve 40, 41 connected by linkage to a lever 30 and to a cam follower 16. The lever 30 is actuated by a speed input 1 to move the controls in the same direction, as indicated by arrows 44, 45. The linkage 33 carries a cam 15 which normally provides the feedback in response to movement of the servomotors from the input signal. If, however one control is too open, the linkage acts to move the servomotors in opposite directions to correct the error. Assume for example that the piston 43 is too far to the right, the link 33 will rotate anticlockwise about pivot 14a causing anticlockwise movement of the cam 15 which allows follower 16 to move downwards. The linkage thus lowers valve 40 to move 42 to the right and lifts valve 41 to move piston 43 to the left until the valves are recentred.</p> |
