Guide apparatus for a turbine of an exhaust gas turbocharger

Abstract

In a guide apparatus for a turbine of an exhaust gas turbocharger with a first insert part and a second insert part arranged opposite the first insert part and with at least one first guide vane for deflecting exhaust gas flowing through the turbine, which is arranged between the insert parts and rotatably supported on at least one of the insert parts so as to be rotatable about an axis of rotation relative to the insert parts, at least one second guide vane for deflecting the exhaust gas is provided which is immovable relative to the insert parts.

What is claimed is: 
     
         1 . A guide apparatus ( 10 ) for a turbine of an exhaust gas turbocharger with an insert element ( 15 ) comprising a first insert part ( 16 ) and second insert part ( 18 ) arranged opposite the first insert part ( 16 ) and with at least one first guide vane ( 12 ) for deflecting exhaust gas flowing through the turbine arranged between the insert parts ( 16 ,  18 ) and rotatably supported on at least one of the insert parts ( 16 ,  18 ) so as to be rotatable about an axis of rotation ( 20 ) relative to the insert parts ( 16 ,  18 ), and at least one second guide vane ( 14 ) for deflecting the exhaust gas mounted immovably between the insert parts ( 16 ,  18 ). 
     
     
         2 . The guide apparatus ( 10 ) according to  claim 1 , wherein at least one of the first and second insert parts ( 16 ,  18 ) and the second guide vane ( 14 ) are at least partially integrally formed with one another. 
     
     
         3 . The guide apparatus ( 10 ) according to  claim 2 , wherein the at least one of the first and second insert part ( 16 ,  18 ) and the second guide vane ( 14 ) are formed jointly cast. 
     
     
         4 . The guide apparatus ( 10 ) according to  claim 1 , wherein the first guide vane ( 12 ) is supported via at least one bearing element ( 22 ) which is rotatable about the axis of rotation ( 20 ) relative to the insert parts ( 16 ,  18 ), is separately formed from the first guide vane ( 12 ) and at least partially accommodated in an opening ( 26 ) of the at least one of the insert parts ( 16 ,  18 ). 
     
     
         5 . The guide apparatus ( 10 ) according to  claim 4 , wherein the opening ( 24 ) is formed as through-hole ( 26 ), so that the bearing element ( 22 ) can be inserted into the through-hole ( 26 ) from a side ( 28 ) of the at least one of the insert parts ( 16 ,  18 ) facing away from the first guide vane ( 12 ). 
     
     
         6 . The guide apparatus ( 10 ) according to  claim 4 , wherein the bearing element ( 22 ) is accommodated also in an opening ( 24 ) of the first guide vane ( 12 ). 
     
     
         7 . The guide apparatus ( 10 ) according to  claim 6 , wherein an anti-twist protection is provided by means of which the first guide vane ( 12 ) is secured against a rotation relative to the bearing element ( 22 ). 
     
     
         8 . The guide apparatus ( 10 ) according to  claim 7 , wherein the anti-twist protection comprises a non-circular outer contour of the bearing element ( 22 ) and an inner contour of the first guide vane ( 12 ) essentially corresponding with the outer contour and defining the other opening ( 24 ). 
     
     
         9 . The guide apparatus ( 10 ) according to  claim 8 , wherein the outer contour and the inner contour each comprise an at least essentially wedge-shaped cross-section. 
     
     
         10 . A turbine for an exhaust gas turbocharger with a turbine casing ( 30 ) in which a guide apparatus ( 10 ) according to  claim 1  is arranged.