| 摘要 |
In order to reduce the pressure loss of compressed gas flowing in a discharge chamber and to reduce vibration and noise by facilitating the damping of the pulsation of gas discharged into the discharge chamber, a screw compressor comprises: male and female rotors; a casing having a bore in which the rotors are housed and having formed therein a suction chamber and a discharge chamber; a slide valve (9) for forming a part of the bore and provided movable in the axial direction of the rotors; leg sections (30A, 30B) provided on the discharge-side end surface of the slide valve; and discharge openings (22A, 22B) provided on the discharge chamber-side of the slide valve in order to discharge compressed gas into the discharge chamber, the compressed gas having been taken in from the suction chamber into a compression operation chamber and having been compressed therein. The discharge-side end of the slide valve is provided with: first discharge flow passages (34A, 34B) for conducting compressed gas into the discharge chamber, the compressed gas having been discharged from the discharge opening; and second discharge flow passages (35A, 35B) which are provided on the outside radially of the first discharge flow passages, are open to the first discharge flow passages and the discharge chamber, and conduct a part of the compressed gas, which flows through the first discharge flow passages, into the discharge chamber. |
