摘要:
A method of and a device for protecting an electric motor (4) in a pod unit (1) for propulsion of marine vessels against shaft bending shocks when the blades (2) of the pod propeller hit ice blocks or other hard objects, said motor (4) having a drive shaft (3), a rotor (41) and a stator (42), said shocks tending to momentarily bend the drive shaft (3) to such an extent that the rotor (41) will come into contact with the stator (42). In accordance with the present invention, the rotor (41) is prevented from coming in detrimental contact with the stator (42) by providing at least two members (61, 62), which together form a radial plain bearing (6) having mating arcuate bearing surfaces (611 and 621, respectively), which during normal operation of the motor (4) are spaced from one another by a gap and come in contact with one another only at extreme loads with short durations. One of the members (61, 62) is an inner member (61) having a circular circumference that constitutes one (611) of the bearing surfaces (611, 621). The arcuate bearing surface (611) of the inner member (61) is coaxial with the rotor (41) and rotary therewith, and at least one of the other members is an outer member (62), which fixed in relation to the stator (42) and has its arcuate bearing surface (621) coaxial there with.
摘要:
The invention relates to a marine vessel propulsion device. It has an electric motor (3,), propeller means (5,) driven by the electric motor and gear means (4,) drivingly connecting the electric motor (3,) to the propeller means (5,). According to the invention the gear means is a magnetic gear (4,) that is axially offset the electric motor (3). The magnetic gear (4) has an input member (45) drivingly connected to the electric motor (3) and at least one output member (44) drivingly connected to the propeller means (5). The invention also relates to a pod unit (1) provided with a such device and to a marine vessel provided with a such pod unit.
摘要:
The invention relates to a propulsion unit 1 for a marine vessel 2 which is intended to operate in icy waters. The propulsion unit is an azimuthing thruster with a propeller 3 mounted on a capsule 6. The propulsion unit 1 can be rotated in relation to the hull of the marine vessel 2 such that the propulsion unit 1 can propel the marine vessel 2 in different directions. The propeller 3 can act on ice to cut blocks of ice. The propeller 3 has a hub 4 which is arranged to cut ice when the hub 4 meets an ice block. The invention also relates to a marine vessel using the inventive propulsion unit.