Abstract: Centrifugal separator comprising a drum (8) driven in rotation by a main electric motor (1), via a machine pulley (5), a first drive shaft (6) and a reducer (7), a screw (17), surrounded by the drum and driven in rotation by a secondary electric motor (9), via a second and third drive shaft (10, 16), coaxial with the first shaft (6), wherein a module is mounted between the secondary electric motor (9) and the reducer (7) comprising a casing (11), a sleeve (13) and a planetary hub (15), the hub passing through the casing and comprising a first planetary gear (25) rigidly attached in rotation to the hub, the sleeve (13) being disposed around a part of the hub (15) and comprising, rigidly attached in rotation, a second planetary gear (26), at least one axle (27) being mounted parallel to the hub (15) and comprising two satellite gears (29,30,31,32), rigidly attached in rotation to the axle, which engage with the first planetary gear (25) and the secondary planetary gear (26) respectively, at least one of the sai

Abstract: A rotary machine carried on a vehicle has a rotary part carried on a fixed part by means of a rolling bearing. The parts of the bearing can be separated by a lifting jack when the vehicle is travelling to reduce vibration and wear. Devices responsive to the pressure supplied to the jack stop the motor driving the rotary part when a first threshold pressure is exceeded, prevent ignition of the vehicle engine until a second threshold pressure is exceeded, and control the pump feeding the jack to maintain a third threshold value which is above the second threshold pressure.