Rotor shaft gravity center offset inner rotor permanent magnet motor

Abstract

Disclosed is a rotor shaft gravity center offset inner rotor permanent magnet motor, which solves the problems that unreasonable structural design increases overall weight and manufacturing cost, themaintenance and the disassembly are difficult, the service life is shortened and the like in the existing permanent magnet motor. The motor comprises a base, a rotor shaft assembled together with thebase through a bearing, a rotor core, a rotor assembly and stator coils. The technical points are: the rotor shaft is a gravity center offset rotor shaft having the center of gravity biased toward a drive side, the shaft diameter of the drive side provided with a seam allowance is greater than that of a support side provided with a load reduction groove, bearing inner and outer glands on an end cover of the drive side are assembled with a deep groove ball bearing / cylindrical roller bearing having the aperture corresponding to the shaft diameter, and bearing inner and outer glands on an end cover of the support side are assembled with an angular contact bearing set having the aperture corresponding to the shaft diameter. The motor has the advantages that the structural design is reasonable, materials are saved, the weight is reduced, the loading / unloading and maintenance operations are easy, the cost is reduced, stable operation of the motor is ensured, the service performance is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to an inner-rotor permanent-magnet motor, in particular to an inner-rotor permanent-magnet motor with a center-of-gravity bias of the rotor shaft capable of simultaneously bearing large bidirectional axial loads, radial loads and relatively large torques. The utility model is especially suitable for long-term working conditions of the ship in the up and down, left and right, front and rear swings and tilts, and belongs to the technical field of permanent magnet motors. Background technique [0002] Normally, permanent magnet motors are generally used on land, but with the continuous advancement of technology, permanent magnet motors are gradually being applied to ships and other fields to replace asynchronous motors with low efficiency and high energy consumption, and diesel engines with serious pollution. When a ship is operating in the ocean, due to strong winds and waves, the ship will seriously swing and tilt up and down, left...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a rotor shaft center of gravity offset type inner rotor permanent magnet motor, which solves the unreasonable structural design of the existing permanent magnet motor, increases the weight of the whole machine and manufacturing cost, makes maintenance and disassembly difficult, and reduces the service life, etc. The problem is that its structural design is reasonable, which not only saves materials, reduces weight, and is easy to load, unload, and maintain, but also helps reduce costs, ensure stable motor operation, improve performance, and prolong service life.

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