Radial compressor

Abstract

A radial compressor, with a compressor rotor, a compressor housing having a radially outer and a radially inner insert section, a main flow channel for supplying a medium toward the compressor rotor, a circulation chamber arranged radially outside of the main flow channel, which is separated from the main flow channel by a contour wall connected with the main flow channel via circulation openings to the insert section via struts extending into the circulation chamber. The main flow channel is bordered by the contour wall, and upstream from the contour wall by an upstream portion of the insert section. A suction element is arranged upstream from the compressor housing, whose radially outer portion adjoins the spiral housing section, and whose radially inner portion adjoins the upstream portion of the insert section. Adjoining surfaces of the suction element and the insert section lie on a cylindrical surface.

What is claimed is: 
     
         1 . A radial compressor, comprising:
 a compressor rotor;   a compressor housing, which has a radially outer spiral housing section and a radially inner insert section;   a main flow channel configured to supply a medium to be compressed towards the compressor rotor;   a circulation chamber arranged radially outside of the main flow channel;   a contour wall that separates the circulation chamber from the main flow channel and is connected with the main flow channel via circulation, and which is connected with the radially inner insert section via struts extending into the circulation chamber,   wherein the main flow channel is bordered by the contour wall, and upstream from the contour wall by an upstream portion of the radially inner insert section; and   a suction element arranged upstream from the compressor housing, whose radially outer portion adjoins the spiral housing section, and whose radially inner portion adjoins the upstream portion of the radially inner insert section;   wherein adjoining surfaces of the radially inner portion of the suction element and the upstream portion of the radially inner insert section lie on a cylindrical surface.   
     
     
         2 . The radial compressor according to  claim 1 , wherein respective surfaces of the radially inner portion of the suction element face radially inward, and an adjoining surface of the upstream portion of the radially inner insert section face radially outward. 
     
     
         3 . The radial compressor according to  claim 1 , wherein the upstream portion of the radially inner insert section is positioned radially inward relative to the radially inner portion of the suction element. 
     
     
         4 . The radial compressor according to  claim 1 , wherein the struts that connect the contour wall with the radially inner insert section engage a portion of the radially inner insert section that is offset radially outward relative to the upstream portion of the radially inner insert section and connected with the upstream portion of the radially inner insert section by a portion extending in a radial direction. 
     
     
         5 . The radial compressor according to  claim 4 , wherein a free space is formed between the portion extending in the radial direction of the radially inner insert section extending in the radial direction and the radially inner portion of the suction element. 
     
     
         6 . The radial compressor according to  claim 1 , wherein one of an undercut and a material recess is formed at the upstream portion of the radially inner insert section. 
     
     
         7 . The radial compressor according to  claim 6 , wherein the one of the undercut and the material recess is directed radially inward in relation to a radially outwardly directed surface of the upstream portion of the radially inner insert section. 
     
     
         8 . The radial compressor according to  claim 1 , wherein the radially inner insert section is integral in design. 
     
     
         9 . The radial compressor according to  claim 1 , wherein the radially inner insert section has a multipart design. 
     
     
         10 . The radial compressor according to  claim 1 , wherein the radially inner insert section and the radially outer spiral housing section of a stator-side compressor housing are separated on the component side and are provided by separate components. 
     
     
         11 . The radial compressor of  claim 1 , wherein the radial compressor is a radial compressor of an exhaust gas turbocharger.