| 摘要 |
PURPOSE:To freely change the starting time of delivery by the screw compressor in the caption by installing control valves which can be moved along rotor-axes in grooves provided on both sides of the groove in which a central control valve is fitted movably along a rotor-axes in a rotor-casing. CONSTITUTION:A central control valve 10 is installed so that it can be moved along the rotor-axes in a groove 9 formed in a rotor-casing 4. Control valves 12 are installed so that they can be moved along the rotor-axes in the grooves 11 provided on both sides of the groove 9 in the rotor-casing 4. By moving the central control valve 10 and the control valves 12 simultaneously or nonsimultaneously and controlling the by-pass timing, the starting time of delivery can be freely changed. |
