Flap arrangement for a turbine of an exhaust-gas turbocharger

A flap arrangement (10) for a turbine (2) of an exhaust-gas turbocharger (1), in particular for a wastegate valve of the turbine (2), having a spindle (100) for rotatably mounting the flap arrangement (10) in a turbine housing (3);

• a lever arm (200), the lever arm (200) being coupled to the spindle (100);
• and
• a flap plate (300), the flap plate (300) being coupled to the lever arm (200);
• characterized in that the flap plate (300) has a flexible part (330) in a radially outer region of the flap plate (300) such that by applying a closing force to the flap arrangement (10) when the flap plate (300) is in contact with a flap seat (500) in the turbine housing (3), elastic and/or plastic deformation of the flexible part (330) of the flap plate (300) can be caused to compensate for thermal deformations of the turbine housing (3), exhaust gas deposits and/or wear,
• characterized in that at least one recess (336) is provided on an underside (302) and/or an upper side (314) of the flexible part (330).

A flap arrangement (10) for a turbine (2) of an exhaust-gas turbocharger (1), in particular for a wastegate valve of the turbine (2), having a spindle (100) for rotatably mounting the flap arrangement (10) in a turbine housing (3);

• a lever arm (200), the lever arm (200) being coupled to the spindle (100);
• and
• a flap plate (300), the flap plate (300) being coupled to the lever arm (200);
• characterized in that the flap plate (300) has a flexible part (330) in a radially outer region of the flap plate (300) such that by applying a closing force to the flap arrangement (10) when the flap plate (300) is in contact with a flap seat (500) in the turbine housing (3), elastic and/or plastic deformation of the flexible part (330) of the flap plate (300) can be caused to compensate for thermal deformations of the turbine housing (3), exhaust gas deposits and/or wear,
• characterized in that at least one portion of the lever arm (200) is flexibly configured such that by applying a closing force to the flap arrangement (10) when the flap plate (300) is in contact with a flap seat (500) in the turbine housing (3), relative movement of the entire flap plate (300) relative to the spindle (100) is enabled to compensate for thermal deformations of the turbine housing (3), exhaust deposits and/or wear.

A flap arrangement (10) for a turbine (2) of an exhaust-gas turbocharger (1), in particular for a wastegate valve of the turbine (2), having a spindle (100) for rotatably mounting the flap arrangement (10) in a turbine housing (3);

• a lever arm (200), the lever arm (200) being coupled to the spindle (100);
• and
• a flap plate (300), the flap plate (300) being coupled to the lever arm (200);
• characterized in that the flap plate (300) has a flexible part (330) in a radially outer region of the flap plate (300) such that by applying a closing force to the flap arrangement (10) when the flap plate (300) is in contact with a flap seat (500) in the turbine housing (3), elastic and/or plastic deformation of the flexible part (330) of the flap plate (300) can be caused to compensate for thermal deformations of the turbine housing (3), exhaust gas deposits and/or wear,
• characterized in that the flap plate (300) and the lever arm (200) are dimensioned and have material properties, such that an angle (α) of up to 3° can be compensated, when a torque in the range of from 0.8 to 20 Nm, is introduced into the spindle (100), wherein the angle (α) is defined as the angle between the plane of the flap seat (500) and the plane of an underside (302) of the flap plate (300).