Holweck Vacuum Pump

Abstract

A Holweck vacuum pump includes a pump rotor ( 16 ) having a rotating tube ( 24 ), a respective pump stator ( 12,14 ) comprising a helical thread groove ( 21,23 ) on the radial inside and outside of said rotor tube ( 24 ), and an inlet-side rotor blade disk ( 28 ) provided with a supporting ring ( 30 ) which supports said rotor tube ( 24 ). The blades ( 18 ) of said blade disk include rotor-side shoulders ( 40 ) which support the supporting ring ( 30 ).

1 . A Holweck vacuum pump comprising
 a pump rotor having a rotating tube and an inlet-side rotor blade disk provided with a supporting ring which supports said rotor tube,   a respective pump stator arranged radially inside and outside said rotor tube and provided with a helical thread groove, and   blades of said blade disk defining rotor-side shoulders which support said supporting ring.   
   
   
       2 . The Holweck vacuum pump according to  claim 1 , wherein the supporting ring does not axially extend into a non-stepped region of the blades. 
   
   
       3 . The Holweck vacuum pump according to  claim 2 , wherein the rotor tube covers an overall axial length of the supporting ring. 
   
   
       4 . The Holweck vacuum pump according to  claim 1 , wherein the blades of the blade disk also define inlet-side shoulders which support a backing ring. 
   
   
       5 . The Holweck vacuum pump according to  claim 1 , wherein an axial length of the blades respectively radially decreases from the shoulder towards the inside. 
   
   
       6 . The Holweck vacuum pump according to  claim 1 , wherein the rotor tube is made from a fiber-reinforced material. 
   
   
       7 . The Holweck vacuum pump according to  claim 1 , wherein the stator includes thread grooves which radially taper from the inlet towards the outlet. 
   
   
       8 . The Holweck vacuum pump according to  claim 1 , wherein the rotor tube is made of carbon fiber-reinforced plastic material. 
   
   
       9 . A Holweck vacuum pump comprising:
 a stator including an inner helical thread and an outer helical thread;   a rotor including a blade disc having a plurality of blades, the blades defining shoulders;   a supporting ring mounted to the blade shoulders; and   a rotor tube supported by the supporting ring and extending between the inner helical threads and the outer helical threads of the stator.   
   
   
       10 . The Holweck pump according to  claim 9  wherein the blades further define inlet-side shoulders and further including:
 a backing ring supported by the inlet-side shoulders.