Flywheel overspeed governor

The utility model provides a flywheel overspeed governor belongs to traffic technical field. The utility model discloses a pawl is installed to axis, foreign steamer, axis outer lane, and the pawl starting point is equipped with the spring, the rotatable small circle wheel of terminal installation of pawl, and the terminal one end of static line simultaneously of pawl, the epaxial baffle that is equipped with control line and centrifugal heavy object orientation in, that the other end of line draws centrifugal heavy object through the axis center, foreign steamer include ratchet and ring gear, the pawl is close to along with centraxonial motion or keeps away from the ratchet. The utility model provides an accelerate because of the ring gear rotational speed results in centraxonial rotational speed at the excessive speed, played the effect of the speed of spindle in the restriction, provide stable rotational speed through this device for the generator for transformer output constant current source and voltage