VACUUM PUMP HAVING A PAIR OF DISPLACEMENT ROTORS ROTATING INSIDE AN AXIAL-FLOW PUMP CHAMBER

摘要

The vacuum pump comprises two rotary displacement rotors 8 which mesh with each other in a particularly helical manner within the expansion chamber which causes the stream to flow in the axial direction. These rotors are mounted on the conveying side in a cantilever manner and connected to drive motors 35 and 36, respectively. Each of the rotors 8 is a single unit from the housing 3 together with its shaft 20 and fixed bearing body 7 and bearings 21 and 22 formed by the shaft 20 and bearing body 7 Thereby forming a module that can be removed. The rotor 35 of the drive motor may be part of the module.