Abstract: A shaft coupling includes a first shaft supported by a bearing at a first end, and a second shaft supported by a bearing at a second end. The first shaft and second shaft are coaxially arranged so that the second end of the first shaft is against the first end of the second shaft. On an end surface of the second end of the first shaft, there is a recess, and a protrusion protrudes from the end surface of the first end of the second shaft, and the recess receives the protrusion. The shaft coupling includes only one third bearing, as well as a coupler which receives the second end of the first shaft and the first end of the second shaft. With such a solution, a greater radial error may be allowed between the shafts without the structures of the coupling point being overloaded.

Abstract: A shaft coupling includes a first shaft supported by a bearing at a first end, and a second shaft supported by a bearing at a second end. The first shaft and second shaft are coaxially arranged so that the second end of the first shaft is against the first end of the second shaft. On an end surface of the second end of the first shaft, there is a recess, and a protrusion protrudes from the end surface of the first end of the second shaft, and the recess receives the protrusion. The shaft coupling includes only one third bearing, as well as a coupler which receives the second end of the first shaft and the first end of the second shaft. With such a solution, a greater radial error may be allowed between the shafts without the structures of the coupling point being overloaded.

Abstract: The invention relates to a measuring apparatus (200) in connection with a gear (10). The gear comprises at least one first shaft (11) and at least one second shaft (14), a gear wheel placed on the first shaft (11) and comprising a helical toothing, which gear wheel (12) cooperates with a gear wheel (13) provided with a helical toothing and located on the second shaft (14). The gear (10) comprises in its connection the measuring apparatus (200), by means of which the axial force transmitted to the shaft (11) can be measured. The measuring apparatus (200) for measuring axial force comprises a bearing (17) located in connection with the shaft (11) in the gear, which bearing receives the axial forces. The axial force is transmitted further via the bearing (17). The device arrangement comprises a rod (20) to which the axial force is transmitted from the bearing (17), the rod (20) being located between the bearing (17) receiving the axial forces and the housing (100) of the gear.

Abstract: An electric asynchronous motor for driving a shaft, a roll shell or a similar machine element includes an annular rotor and an annular stator, each having an end face at each of their respective ends. The rotor is connected to a motor shaft by way of spokes. A motor cooling system includes an internal cooling air circuit wherein an air stream flows between the rotor and the motor shaft as well as through an annular heat exchanger for transferring heat from the rotor and/or the stator to a cooling liquid. The annular heat exchanger is positioned within the motor's housing in the area of an end face of the rotor. The cooling air stream also passes over blower vanes and at least one annular series of air circulation channels in the annular body of the stator and/or of the rotor with air streams flowing from the one end face to the other end face of the stator and/or of the rotor, so that the cooling air circuit forms an internal toroidal air stream.

Abstract: An electric asynchronous motor for driving a shaft, a roll shell or a similar machine element includes an annular rotor and an annular stator, each having an end face at each of their respective ends. The rotor is connected to a motor shaft by way of spokes. A motor cooling system includes an internal cooling air circuit wherein an air stream flows between the rotor and the motor shaft as well as through an annular heat exchanger for transferring heat from the rotor and/or the stator to a cooling liquid. The annular heat exchanger is positioned within the motor's housing in the area of an end face of the rotor. The cooling air stream also passes over blower vanes and at least one annular series of air circulation channels in the annular body of the stator and/or of the rotor with air streams flowing from the one end face to the other end face of the stator and/or of the rotor, so that the cooling air circuit forms an internal toroidal air stream.