| 摘要 |
PURPOSE:To obtain a pressure control function without using a reducing valve by a method wherein opening and closing of a variable nozzle, provided at a gas inflow part, are controlled in accordance with a pressure at a gas outflow port side. CONSTITUTION:The variable nozzle 6 for controlling the flow amount of gas supplied to a turbine 5 is provided at the side of the gas inflow port 2. A nozzle control means 15 is provided with an actuator driver 17 operating an actuator 13 for the variabl nozzle 6 in accordance with the pressure of gas A at the gas outflow port 3. The pressure of the discharging gas A is detected by a pressure sensor 16 and the variable nozzle 6 is operated into closing direction when the pressure is apt to increase, while the variable nozzle 6 is operated into the opening direction thereof when the pressure is apt to decrease. |
