Turbine

Abstract

The invention relates to a turbomachine (1) having a bearing housing (30), a shaft (40', 40") rotatably supported in an inner chamber (31) of the bearing housing (30), through a weld (S' , S") is materially connected to the longitudinal end (41', 41 ") of the shaft (40', 40") and is arranged in the working impeller chamber (22) outside the inner chamber (31) ( 25', 25") and a seal (50), which is arranged on the circumference of the shaft (40', 40"), thereby sealing the inner chamber (31) relative to the working impeller chamber (22), wherein the seal For sealing, it cooperates with two mutually oppositely rotating sealing surfaces (51', 52'; 51", 52"). The object of the present invention is to provide a turbomachine in which undesired loosening of the welded connection between the impeller wheel and the shaft is reliably prevented. This is achieved in that the sealing surface material of at least one of the two sealing surfaces forms an insulating layer (T', T") arranged between the seal and the impeller.

Description

technical field [0001] The invention relates to a turbomachine with a bearing housing, a shaft mounted rotatably in an inner chamber of the bearing housing, materially connected to the longitudinal ends of the shaft by weld seams and arranged outside the inner chamber in a working impeller chamber The impeller in the center and the seal arranged on the circumference of the shaft thereby sealing the inner space relative to the impeller chamber, wherein the seal cooperates with two mutually opposing, rotating sealing surfaces for sealing. Background technique [0002] figure 2 combine figure 1 The turbine 1 is shown in the form described above. The turbomachine 1 is designed in the form of a turbocharger and has a turbocompressor 10 and an exhaust gas turbine 20 . The turbomachine 1 has a compressor housing 11 , a turbine housing 21 and a bearing housing 30 connecting the compressor housing 11 to the turbine housing 21 , which is made of ductile iron. [0003] The turbine...

AI Technical Summary

Problems solved by technology

[0008] The welded connection between the rotor wheel 25 and the shaft 40 configured in this way has repeatedly been damaged in the past during the operation of the turbine 1 in the form that the welded connection between the rotor wheel 25 and the shaft 40 becomes loose undesirably.

Images