Patent ID: 8182408

Claim:
A centrifugal separator for centrifuging components, contained in a liquid mixture and having different density, comprising a rotating centrifuge rotor, arranged to rotate around a centre axis and comprising a casing which defines an inner separation space, a set of separation discs provided in the inner separation space of the centrifuge rotor, at least two channels being in fluid communication with the separation space and comprising at least one inlet channel for supply of the liquid mixture of components to be separated to the separation space and at least one outlet channel for discharge of a component separated during operation from the separation space, a torque transmitting part around the centre axis and fixedly connected to the centrifuge rotor, and a drive motor, which drives the torque transmitting part and thus the centrifuge rotor in such a way that the centrifuge rotor is brought to rotate, wherein the drive motor comprises a stator and a rotor, which is fixedly connected to the torque transmitting part, wherein the rotor of the drive motor surrounds a cavity, through which liquid flows during operation of the centrifugal separator, and wherein the drive motor is provided axially outside the centrifuge rotor in the direction of the centre axis; the drive motor having a first axial end turned towards the centrifuge rotor and a second axial end turned away from the centrifuge rotor, the centrifugal separator comprising a stationary frame and a first bearing and a second bearing, which are connected to the frame, the torque transmitting part is rotatably journalled in the first bearing and the second bearing, the first bearing is provided between the drive motor and the centrifuge rotor, and the second bearing is provided outside the second axial end of the drive motor.