REGULATING DEVICE FOR AN EXHAUST-GAS GUIDING SECTION OF A TURBINE, AND EXHAUST-GAS GUIDING SECTION FOR A TURBINE

摘要

The invention relates to a regulating device for an exhaust-gas guiding section, through which flow can pass, of a turbine, in particular for a turbine of an exhaust-gas turbocharger, wherein the regulating device (5) is provided for opening and closing a bypass duct (6) in the exhaust-gas guiding section (1), through which flow can pass, for the purpose of bypassing a turbine wheel of the exhaust-gas guiding section (1), said turbine wheel being arranged rotatably in the exhaust-gas guding section (1) in a wheel chamber of the exhaust-gas guiding section (1), comprising a movement apparatus (30) and a cover element (9), wherein the cover element (9) is provided for opening or closing a flow cross section (8) of the bypass duct (6) by way of a rotational movement of the cover element (9). According to the invention, the cover element (9) is designed such that it can perform a rotational movement with respect to the flow cross section (8) about an axis of rotation (10) of the cover element (9) in the bypass duct (6), wherein the axis of rotation (10) is positioned so as to extend through the bypass duct (6).