FIELD: vacuum facilities.
SUBSTANCE: proposed invention relates to vacuum mechanical pumps. It has cylindrical housing divided by cross stator wheels, and rotor with set of rotor wheels made in form of radial impellers closed from both sides by disks. One of disks is provided with central hole coinciding in diameter with hole in stator wheel made in form of disk with one-side profiled fining. Blades of rotor impeller and stator wheel fining are made with spiral curving to side opposite to direction of rotation.
EFFECT: improved evacuation characteristics of pump owing to increased coefficient of compression of each stage.
3 dwg
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