| 摘要 |
A diffuser apparatus which includes a diffuser provided as a passage space communicated with the exit side of an impellor radially outwardly of the impellor of a centrifugal compressor, the apparatus including a housing portion which houses a rotational plate therein so as to be rotatable about a rotational axis and forms a hub side wall portion, wherein the side surface of the rotational plate on the diffuser side is provided with a vane having one end in the circumferential direction fixed to the rotational plate, the other end in the circumferential direction movable in the direction of the axis, and flexibility, the housing portion is provided with an inclination path which has one end opened to the portion which forms the hub side wall portion, and bendably guides the vane so that the other end of the vane is moved in the circumferential direction with the rotation of the rotational plate and is moved in the direction of the axis so as to be projected into the diffuser, and an actuator rotates the rotational plate so that the vane is driven between a projected position where the other end is projected into the diffuser and a retracted position where the other end is retracted into the hub side wall portion. |
