A magnetic bearing device applied to a shaftless propeller of a ship

Abstract

The invention discloses a magnetic bearing device applied to a ship non-shaft propeller. The device comprises a propeller shell, a stator and a rotor, and two first clamping blocks are fixed to two ends of the inner surface of the side wall of the propeller shell; two ends of the stator are clamped between the two first clamping blocks, a Hall sensor is fixed to the inner surface of the side wallof the stator, and a torque coil is embedded in the middle of the stator; three sets of field windings are arranged on the side wall of the stator, the field windings are added to the stator, and upper floating force which offsets the gravity of the rotor is generated on the rotor; a radial magnetic bearing is arranged between the rotor and the stator, the radial magnetic bearing does not completely replace a water lubrication bearing and is only used for improving the running state of an original bearing, and the radial magnetic bearing solves the problems of border lubrication and dry fiction in the starting, stopping and low rotation speed state of the water lubrication bearing; the running work condition of the water lubrication bearing can also be improved in the running process, thereliability of propeller running is guaranteed, and the device has the advantages that the device is easy to control and runs reliably.

Description

technical field [0001] The invention belongs to the field of magnetic bearings and relates to a magnetic bearing device applied to shaftless propellers of ships. Background technique [0002] The marine shaftless propeller is driven by a novel motor system, which completely cancels the propulsion shaft, which is a revolutionary technological advancement for ship propulsion. The current shaftless propellers of ships mostly use Sailong water-lubricated sliding bearings. Because water-lubricated bearings have high requirements on material performance, my country currently mainly relies on imports of such bearing materials. [0003] The invention patent with the patent application number 201410558863.0 discloses a marine permanent magnet motor propeller propeller, which is powered by a permanent magnet motor, does not require bearings and lubricating oil, and can reduce transmission noise, but due to the use of water in the permanent magnet motor Lubricated bearings have bounda...

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Problems solved by technology

[0003] The invention patent with the patent application number 201410558863.0 discloses a marine permanent magnet motor propeller propeller, which is powered by a permanent magnet motor, does not require bearings and lubricating oil, and can reduce transmission noise, but due to the use of water in the permanent magnet motor Lubricated bearings have boundary lubrication and dry friction problems at start-stop and low-speed conditions. At the same time, because the rotor has gravity, it is necessary to control the influence of the gravity of the rotor, and the control process is complicated.

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