| 摘要 |
Centrifugal governor device for the automatic actuation of a shutter (4) constituted by wings (104) of a fan housed in a container (2), and comprising at least an impeller (1) provided with a rotating shaft (201), connected to driving means (8); said device comprises a support protective casing (43) fixed to said shaft (201) and provided at its interior with at least an actuator (15) carrying posteriori a stem (115) to which are connected, by suitable means (124, 125, 23) the lower ends of a pair of levers (24, 25), which are symmetrical with respect to said actuator, and comprising each, at the upper end, at least a counterweight (26), and in an intermediate position, a rotation pin (224, 225) fixed to said protective casing (43); said connection means (124, 125, 23) allow a sliding movement of the actuator (15) inside a guide (343) obtained in said protective casing (43), by the centrifugal force generated by said counterweights (26) upon driving of the shaft (201) and the consequent rotation of said levers (24, 25) around to the relative pins (224, 225); the actuator (15) is anteriorly connected to a fork (17, 31) suitable to slide outside and inside of the protective casing (43) through a through hole (42) obtained in said protective casing and suitable to open or close a predetermined wing (104') connected to said fork (17, 31) and the remaining wings (104) of the shutter (4) by means of suitable transmission means (9, 10).
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