Eccentric screw pump with magnetic coupling

An eccentric screw pump comprising:

• a rotor of a pump drive shaft circling about a fixed axis relative to a stator in a bearing block, the pump drive shaft being rotationally driven by a motor drive shaft of a motor,
• a power train, and
• a screw conveyor, which revolves in a rotating-oscillating manner in a screw flight of the stator,
• wherein the power train provides the screw conveyor with drive torque, and the power train adjusts differences of motion sequences of the screw conveyor and of the pump drive shaft,
• wherein the eccentric screw pump includes an air gap between the motor drive shaft and the pump drive shaft, wherein the motor drive shaft supports a motor-side coupling half and the pump drive shaft supports a pump-side coupling half, which are connected to one another in a torque-transmitting manner by means of magnetic forces across the air gap, and wherein the air gap is penetrated by a seal, which hermetically separates a motor region from the rest of the eccentric screw pump, and
• wherein the bearing block or drive region has at least one connection configured to introduce an auxiliary fluid, and at least one further connection configured to discharge the auxiliary fluid.