Exhaust-gas turbocharger

Abstract

An exhaust-gas turbocharger ( 1 ) having a shaft ( 2 ), which has a first centric bore ( 4 ) on an end face ( 3 ), a turbine wheel ( 5 ), which has a second centric bore ( 7 ) in the wheel rear side ( 6 ) thereof, a connection piece ( 8 ), which engages into the first and second bores ( 4, 7 ); and an integral connection device ( 9 ) for connecting the shaft ( 2 ) to the turbine wheel ( 5 ), wherein the connection piece ( 8 ) is hollow in form.

1 . An exhaust-gas turbocharger ( 1 ) having
 a shaft ( 2 ), which has a first centric bore ( 4 ) on an end face ( 3 );   a turbine wheel ( 5 ) having a wheel rear side ( 6 ), which has a second centric bore ( 7 ) in the wheel rear side ( 6 ) thereof;   a connection piece ( 8 ), which engages into the first and second bores ( 4 ,  7 ); and   an integral connection device ( 9 ) for connecting the shaft ( 2 ) to the turbine wheel ( 5 ),   
       wherein
 the connection piece ( 8 ) is hollow in form. 
 
     
     
         2 . The exhaust-gas turbocharger as claimed in  claim 1 , wherein the connection piece ( 8 ) is in the form of a bored-out sleeve. 
     
     
         3 . The exhaust-gas turbocharger as claimed in  claim 1 , wherein the connection piece ( 8 ) is in the form of a hollow clamping sleeve. 
     
     
         4 . The exhaust-gas turbocharger as claimed in  claim 1 , wherein the connection piece ( 8 ) has a circular-cylindrical cross section. 
     
     
         5 . The exhaust-gas turbocharger as claimed in  claim 1 , wherein the connection piece ( 8 ) has an angular cross section. 
     
     
         6 . The exhaust-gas turbocharger as claimed in  claim 1 , wherein the turbine wheel ( 5 ) is formed from TiAl material. 
     
     
         7 . The exhaust-gas turbocharger as claimed in  claim 1 , wherein the shaft ( 2 ) is formed from steel. 
     
     
         8 . The exhaust-gas turbocharger as claimed in  claim 1 , wherein the integral connection device ( 9 ) is a soldered, adhesively bonded or welded connection. 
     
     
         9 . A rotor of an exhaust-gas turbocharger ( 1 ), having
 a shaft ( 2 ), which has a first centric bore ( 4 ) on an end face ( 3 );   a turbine wheel ( 5 ) having a wheel rear side ( 6 ), which has a second centric bore ( 7 ) in the wheel rear side ( 6 ) thereof;   a connection piece ( 8 ), which engages into the first and second bores ( 4 ,  7 ); and   an integral connection device ( 9 ) for connecting the shaft ( 2 ) to the turbine wheel ( 5 ),   
       wherein
 the connection piece ( 8 ) is hollow in form. 
 
     
     
         10 . The rotor as claimed in  claim 9 , wherein the connection piece ( 8 ) is in the form of a bored-out sleeve. 
     
     
         11 . The rotor as claimed in  claim 9 , wherein the connection piece ( 8 ) is in the form of a hollow clamping sleeve. 
     
     
         12 . The rotor as claimed in  claim 9 , wherein the connection piece ( 8 ) has a circular-cylindrical cross section. 
     
     
         13 . The rotor as claimed in  claim 9 , wherein the connection piece ( 8 ) has an angular cross section. 
     
     
         14 . The rotor as claimed in  claim 9 , wherein the turbine wheel ( 5 ) is formed from TiAl material. 
     
     
         15 . The rotor as claimed in  claim 9 , wherein the shaft ( 2 ) is formed from steel. 
     
     
         16 . The rotor as claimed in  claim 9 , wherein the integral connection device ( 9 ) is a soldered, adhesively bonded or welded connection.