| 摘要 |
PURPOSE:To prevent misfiring by detecting the differential pressure between the flow-in port and flow-out port of a flow divider of a gas turbine employing plural kinds of fuels and producing an alarm upon exceeding over predetermined level then exchanging the type of fuel after elapsing predetermined time. CONSTITUTION:Upon occurrence of adhesion, biting of foreign matter in a flow divider 7 during usage of liquid fuel 1, independent rotation is blocked to increase the differential pressure between the flow-in and flow-out ports. Here a differential pressure switch 28 connected in parallel with a differential pressure meter 29 will be higher than the setting level to function an alarm 32 by means of a voltage signal 31. At the same time a signal is fed from an exchange controller 34 to a servo valve 25 for driving a fuel gas control valve to open the fuel gas control valve 24 and after elapsing predetermined exchange time, it is switched to gas fuel 20. Consequently misfiring due to fault of flow divider 7 can be prevented. |
