| 摘要 |
A speed governor for a pneumatic rotation motor having a pressure air inlet passage ( 15, 15 '), an inlet valve ( 16; 56 ) including a flow controlling valve element ( 18; 58 ) located in the inlet passage ( 15, 15 '), and a speed responsive activating device ( 24; 54 ) operatively connected to the inlet valve ( 16; 56 ), wherein the activating device ( 24, 54 ) comprises a pilot circuit with an activating surface ( 20; 70 ) on the valve element ( 18; 58 ), a restricted air supply opening ( 21, 72 ) communicating with the activating surface ( 20; 70 ), a bleed-off valve ( 24; 54 ) which communicates with the activating surface ( 20; 70 ) and which comprises an electromagnet actuator ( 27; 76 ), and a generator ( 30 ) driven by the motor and delivering to the actuator ( 27; 76 ) a voltage of a magnitude responsive to the actual motor speed to thereby make the bleed-off valve ( 24; 54 ) operate in response to the output voltage of the generator ( 30 ) and the actual motor speed. |
