| 摘要 |
The present invention relates to a screw rotor type vacuum pump incorporating a driving motor in any one of the pair of screw rotors, wherein the deformation of rotation balance may be reduced when the pair of screw rotors rotates. According to the present invention, provided is a screw rotor type vacuum pump comprising: a pair of screw rotors of which rotates and is to be engaged with each other; a housing for receiving the pair of screw rotors and having a suction hole at one side and a discharge hole at the other side; and a motor incorporated in any one of the pair of screw rotors for driving the rotation shaft thereof.
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