| 摘要 |
PROBLEM TO BE SOLVED: To provide a movable vane driving device in a movable vane fluid apparatus capable of using a small movable vane driving actuator having a small output by reducing a resistance of a screwing part in an advance/retreat moving mechanism. SOLUTION: The advance/retreat moving mechanism 11 is driven by an operation of the movable vane driving actuator 10, a thrust bearing device 8, a rotary cylindrical body 7, and a blade angle operating rod 6 are lifted up/down in an axial direction. The advance/retreat moving mechanism 11 is composed of three rotary shafts 16A to 16C which are disposed in parallel with an axis of the main shaft 1 and which are simultaneously rotated by an operation of the movable vane driving actuator 10, and three female screw comas 28A to 28C which are disposed integratedly with the bearing device 8, and which are provided with each female screw part 27 screwed around each male screw part 26 of the rotary shafts 16A to 16C.
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