Vacuum pump

摘要

A pair of Northey rotors for a vacuum pump, in which each rotor comprises two opposing, substantially parallel faces, and a peripheral surface located between the opposing faces. In order to reduce damage caused by pumping a gas stream containing liquid or solid particulates, a plurality of grooves is located on the peripheral surface for accommodating the particulates.

主权项

1. An apparatus comprising:
a Northey rotor for a vacuum pump, the Northey rotor comprising two opposing, substantially parallel faces, a peripheral surface located between the opposing faces and comprising a substantially cylindrical portion extending from a claw portion to a depression portion, the claw portion protruding from the substantially cylindrical portion and extending from the depression portion to the substantially cylindrical portion, and a plurality of grooves located on the peripheral surface, wherein at least one of the grooves is substantially parallel to the substantially parallel faces and is spaced from at least one of the substantially parallel faces.