| 摘要 |
PROBLEM TO BE SOLVED: To avoid surging by holding a valve to a large opening degree in a process when a bleed valve is gradually closed, in the case where air pressure is controlled, in a device for opening/closing communication of a fluid passage of a compressor with a bypass fluid passage by a piston. SOLUTION: A bleed valve 10 installed on a compressor part of a gas turbine engine having a bypass passage 112, is provided with a sealed casing having a piston 126, and a guide rod 128 whose upper end part is fixed to an upper chamber housing 127 for defining a sealed chamber 132, and whose lower end part is fixed to a valve chamber housing 52. A piston head 134 is fitted in the sealed chamber 132. An opening/closing element 136 provided with a truncated cone-shaped surface 137 and a partially cylindrical skirt 138 is formed integratedly with the piston 126, and bleed air is passed a bypass passage 112 through opening parts 142, 140 on an opening position of the bleed valve 110. |
