Patent ID: 6457954
Filing Date: 2002-10-01
Classification: F04D

Abstract:
Friction vacuum pump with a frame (50, stator (3), rotor (4), with components (16, 63), with their auxiliary frame (5), stator (3), and rotor (4) joined into one unit, as well as with a housing (19), which is attached to the frame (5), accommodates the stator (3) and rotor (4), and is equipped with a connection (39) for the chamber that must be evacuated, whereinthe friction vacuum pump is constructed like a turbo molecular vacuum pump, at least in sections, with rows of rotor blades and rows of stator blades, the stator has several stator rings, two construction elements (18, 19; 61, 55) have been provided in order to fulfill the function of the pump's housing, the first inner construction element (18,61) serves to center the stator rings, in addition to arranging and mounting of the frame (5), stator (3), and rotor (4), and forms a unit with these components, and the second outer construction element in the housing (19,55), which receives said first inner construction element therein, at least in part, and serves to seal the vacuum pump from outside as well as connecting the vacuum pump with the chamber that is to be evacuated.