VALVE WITH FAIL-SAFE MECHANISM

摘要

Valve (10) for use in a coolant flow, comprising a valve housing (12) with at least one inlet (18) and at least one outlet (19); a valve body (16) which is received rotatably by the valve housing (12), wherein the coolant flow between the inlet (18) and outlet (19) varies depending on the rotary position of the valve body (16); an actuator (24) with a shaft (26) for rotating the valve body (16); and a fail-safe mechanism (40) which can be prestressed rotationally; wherein the valve body (16) is in rotary engagement with an axially movable coupling element (28), via which the valve body (16) is releasably connected indirectly to the actuator shaft (26), wherein, in the case of a fault, the valve body (16) can be decoupled from the actuator shaft (26) as a consequence of an axial movement of the coupling element (28), wherein the fail-safe mechanism (40) is adapted to pass into rotary engagement with the coupling element (28) as a consequence of the axial movement of the coupling element (28), in order to rotate the valve body (16) into a predefined fail-safe position.