| 摘要 |
<p>368,817. Steam turbines; engine stop-gear. AKT.-GES. BROWN, BOVERI, ET CIE, Baden, Switzerland. Dec. 8, 1930, No. 37021. Convention date, Dec. 30, 1929. [Classes 110 (iii) and 122 (iv).]. The main stop valve l and the regulating valves q of a steam turbine a are actuated by oil pressure in pipe lines g, n, connected to a manually operated starting valve h. This valve may be set by a hand-wheel h<1> to drain the pipe lines, in which case the valves l, q are closed. On starting, the operation of the starting valve h opens the admission valves in the following sequence: (1) the byepass valve z is opened to balance the steam pressure on the stop valve l; (2) the stop valve is opened by the piston y; (3) the regulating valves q are opened by oil pressure in the pipe n. When the turbine attains speed a centrifugal governor b controls the opening in succession of the regulating valves q by controlling the opening o of an oil leak-away in the pressure line n. A stop-gear is provided. When the starter h is actuated a spring x arranged between two sleeves is stressed. At excess speed a safety governor v knocks up a latch w and shifts the parts of the valve h so that the pipes g, n are drained. A knob h<11> enables the stopgear to be operated manually.</p> |
