Exhaust Gas Turbine Of An Exhaust Gas Turbocharger With A Sealed Wastegate Valve Device, And Exhaust Gas Turbocharger

An exhaust gas turbine of an exhaust gas turbocharger having a wastegate valve device, the exhaust gas turbine includes:

• a turbine housing having a housing wall and a bearing bore passing through the housing wall,
• a bearing bush arranged in the bearing bore of the turbine housing in such a way as to be fixed in a gastight manner,
• a wastegate valve device having a valve spindle, the valve spindle is passed outward from an interior of the turbine housing through the housing wall in an axial direction in the bearing bush and is mounted in the bearing bush so as to be rotatable about its spindle axis, and the valve spindle includes, in the interior of the turbine housing, a valve spindle shoulder and a valve flap arranged at an end of the valve spindle,
• wherein an adjusting lever having an adjusting lever connecting flange is arranged on the valve spindle on an outside of the turbine housing to actuate the wastegate valve device, and
• wherein the bearing bush in each case intermeshes in the axial direction in the manner of a labyrinth seal, at least at one of its axial ends, with the adjusting lever connecting flange and/or the valve spindle shoulder by at least one axially extending sealing web and at least one sealing groove, complementary thereto, which are circumferential with respect to the spindle axis.