Weld-free pot volute casing

Abstract

A method for producing a pot for a pot volute casing for a turbo-motor, particularly for a compressor, and a pot volute casing for a turbo-motor is provided. According to the method for producing a pot for a pot volute casing, the pot is produced from a blank using a chip-removing machining method. The pot volute casing has a pot produced in accordance with the method for producing a pot for a pot volute casing.

1 . A method for producing a pot for a pot-type volute casing for a turbomachine, wherein the pot is produced from a blank by way of a cutting manufacturing process, the blank having a substantially droplet-shaped external contour when viewed in cross section. 
     
     
         2 . The method as claimed in  claim 1 , wherein the cutting manufacturing process is a turning, milling and/or drilling process. 
     
     
         3 . The method as claimed in  claim 1 , wherein the blank which is substantially droplet-shaped in cross section is produced by forging of a body on a substantially cylindrical main body in a die. 
     
     
         4 . A pot-type volute casing of a geared turbocompressor, having a pot produced as claimed in  claim 1 . 
     
     
         5 . The pot-type volute casing as claimed in  claim 4 , wherein a plant pipework screwed to the pot, in particular a pressure connector pipe is screwed to the pot. 
     
     
         6 . The pot-type volute casing as claimed in  claim 4 , wherein a machined external contour surface on the pot, by way of which external contour surface a plant pipework, in particular a pressure connector pipe, is screwed to the pot. 
     
     
         7 . The pot-type volute casing as claimed in  claim 4 , used in a turbomachine for the discharge or supply of a flow of a fluid, in particular in a compressor, an expander or a turbine. 
     
     
         8 . A geared turbocompressor having a pot-type volute casing as claimed in  claim 4  and having a gearbox connection screwed to the pot of the pot-type volute casing, in particular a collar screwed to the pot of the pot-type volute casing. 
     
     
         9 . (canceled) 
     
     
         10 . (canceled)