Centrifugal turbine blower with gas foil bearings

Abstract

Disclosed is a centrifugal turbine gas blower with foil bearings for use with a fast axial flow laser. The blower utilizes variable components in order to operate at different speeds for multiple applications. In addition, a bypass load has been incorporated to avoid a surge condition. The blower utilizes foil bearings that are self-lubricating in order to achieve improved efficiency and maximized speeds during operation. The bearings are designed with a bump layer that provides damping for pre-load. Additionally, the backplate of the thrust assembly contains holes in order to reduce the thrust load and to balance the force on the impeller.

1 . A centrifugal turbine blower for use in high-powered laser applications, said blower comprising:
 an induction motor;   a gas mixing unit configured to receive a plurality of gases; and   a control module for operating said gas mixing unit;   wherein said gas mixing unit combines said plurality of gases that are delivered at a specific flow rate to a laser; and   wherein said induction motor has a common housing comprising variable rotor, shroud and compressor sizes.   
   
   
       2 . The blower of  claim 1 , further comprising:
 a foil radial bearing; and   a foil thrust bearing;   wherein the bearings are of the non-contact, self lubricating type.   
   
   
       3 . The blower of  claim 2 , wherein said foil radial bearing contains bump foil. 
   
   
       4 . A centrifugal turbine blower for use in high-powered laser applications, said blower comprising:
 an induction motor;   a foil radial bearing;   a foil thrust bearing;   a bypass load;   a gas mixing unit configured to receive a plurality of gases;   a microprocessor control module; and   an impeller having a backplate with holes;   wherein said motor has a common housing comprising of variable rotor, shroud and compressor sizes;   wherein said gas mixing unit is configured to blend said plurality of gases into a predetermined mixture delivered at a specific flow rate to a laser;   wherein said microprocessor control module operates said gas mixing unit; and   wherein said bypass load allows for peak efficiency of the device while avoiding surge conditions.   
   
   
       5 . The blower of  claim 4 , wherein said bearings are of the non-contact, self lubricating type. 
   
   
       6 . The blower of  claim 4 , wherein said foil radial bearing contains bump foil. 
   
   
       7 . A centrifugal turbine blower for use in high-powered laser applications, said blower comprising:
 an induction motor;   a gas mixing unit configured to receive a predetermined mixture of Helium, Nitrogen and Carbon-dioxide gases from a plurality of bottled gas sources; and   a microprocessor control module, wherein said microprocessor control module   operates said gas mixing unit;   wherein said gas mixing unit is configured to receive said predetermined mixture of Helium, Nitrogen and Carbon-dioxide gases, and wherein said predetermined mixture is delivered at a specific flow rate to a laser; and   wherein said induction motor has a common housing comprising variable rotor, shroud and compressor sizes.   
   
   
       8 . The blower of  claim 4 , wherein said plurality of gases is a gas selected from the group consisting of Helium, Nitrogen and Carbon-dioxide. 
   
   
       9 . The blower of  claim 7 , further comprising a foil radial bearing of the non-contact, self-lubricating type. 
   
   
       10 . The blower of  claim 9 , further comprising a foil thrust bearing of the non-contact self-lubricating type. 
   
   
       11 . The blower of  claim 10 , wherein said foil radial bearing contains bump foil.