| 摘要 |
<p>A diffuser apparatus which includes a diffuser (10) provided as a passage space communicated with the exit side of an impellor (2) of a centrifugal compressor, radially outwardly of the impellor (2), the apparatus including a housing portion (13) which houses a rotational plate (12) therein so as to be rotatable about a rotational axis (Ax) and forms a hub side wall portion (10b), wherein the side surface of the rotational plate (12) on the diffuser (10) side is provided with a vane (15) having one end in the circumferential direction fixed to the rotational plate (12), the other end in the circumferential direction movable in the direction of the axis (Ax), and flexibility, the housing portion (13) is provided with an inclination path (18) which has one end (18a) opened to the portion which forms the hub side wall portion (10b), and bendably guides the vane (15) so that the other end (15b) of the vane (15) is moved in the circumferential direction with the rotation of the rotational plate (12) and is moved in the direction of the axis (Ax) so as to be projected into the diffuser (10), and an actuator (14) rotates the rotational plate (12) so that the vane (15) is driven between a projected position where the other end (15b) is projected into the diffuser (10) and a retracted position where the other end (15b) is retracted into the hub side wall portion (10b).</p> |
