| 摘要 |
<p>An elevator car speed governor is mounted on the top of the car assembly (2), and measures car speed by contacting a fixed element (6) in the hoistway. The fixed element can be a taut cable extending from the top of the hoistway to the pit, or one of the car guide rails, for example. The governor has a centrifugally operated connection (16,18) with emergency brakes (22) on the car. When overspeed is detected, the connection is actuated to cause the brakes to engage the guide rails and stop the car. The governor can operate at relatively low overspeed rates, and can be used on elevator systems which do not have an overhead machine room, such as hydraulic and linear induction motor elevators. <IMAGE></p> |
