| 摘要 |
A screw compressor according to the present invention includes a slide valve adapted to move forward and backward in parallel with the axis of a pair of screw rotors and also includes a plurality of hydraulic cylinders for moving the slide valve forward and backward, the plural hydraulic cylinders imparting, in synchronization with each other, a driving force to the slide valve in the same direction. With this configuration, it is possible to quicken an operation of the slide valve and improve the responsivity in volume control without increasing the diameters of pistons of the hydraulic cylinders for actuating the slide valve and without complicating equipment.
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