Radial magnetic circuit assembly device and radial magnetic circuit assembly method

A radial magnetic circuit assembly method, comprising the steps of:

• S1, providing a magnetic central column, wherein the magnetic central column comprises a large-diameter section and a small-diameter section connected in sequence, and a limit step is formed at a joint of the large-diameter section and the small-diameter section;
• S2, providing a lower lantern ring, annularly and uniformly arranging a plurality of tile-shaped magnets on the limit step first, and then sleeving the lower lantern ring around the tile-shaped magnet in a direction from the large-diameter section towards the small-diameter section to limit a radial displacement of each tile-shaped magnet;
• or alternatively, sleeving the lower lantern ring around the large-diameter section in a direction from the large-diameter section towards the small-diameter section, and then annularly and uniformly arranging each tile-shaped magnet in a space formed between the limit step and the lower lantern ring, such that the lower lantern ring limits a radial displacement of each tile-shaped magnet;
• S3, providing an upper lantern ring, sleeving an upper axial magnetic sheet around the small-diameter section first, and then sleeving the upper lantern ring around the tile-shaped magnet in the direction from the small-diameter section towards the large-diameter section to press the upper axial magnetic sheet against an upper axial side surface of each tile-shaped magnet, such that the upper axial magnetic sheet is secured with each tile-shaped magnet;
• S4, pushing the upper axial magnetic sheet and each tile-shaped magnet that have been assembled out of the small-diameter section;
• S5, turning over the upper axial magnetic sheet and each tile-shaped magnet that have been assembled and sleeving the upper axial magnetic sheet and each tile-shaped magnet that have been assembled around the small-diameter section first, then, sleeving the lower axial magnetic sheet around the small-diameter section, and then sleeving the upper lantern ring in a direction from the small-diameter section towards the large-diameter section to press the lower axial magnetic sheet against the lower axial side surface of each tile-shaped magnet, such that the lower axial magnetic sheet is secured with each tile-shaped magnet;
• and
• S6, pushing the upper axial magnetic sheet, the upper lower axial magnetic sheet and each tile-shaped magnet that have been assembled out of the small-diameter section.