| 摘要 |
<p>A device (20) for controlling opening of an on-off valve (IV) of a steam turbine system (1) having a bypass line parallel to a high-pressure turbine section; the device has a speed relay (22) for controlling opening of the regulating and on-off valves (CV, IV) by means of lever mechanisms (21) which correlate opening of the on-off valve (IV) with opening of the regulating valve (CV); a secondary relay (24) is provided to transmit control from a first portion (25) of the lever mechanisms (21), activated by the speed relay (22), to a second portion (26) of the lever mechanisms (21); and the secondary relay has a mechanical feedback cam (50).</p> |
