Rotor and rotary machine

A rotor of a rotary machine, the rotor comprising:

• a shaft being a rotation axis of the rotor;
• and
• a rotating body provided with the shaft, wherein
• the rotating body includes:
• a plurality of divided cores formed by laminating a plurality of first electric steel sheets, the plurality of divided cores being arranged in a circumferential direction, corresponding to a rotation direction of the rotor, with respect to a center of the shaft;
• a plurality of permanent magnets equal in number to the number of the plurality of divided cores, the plurality of permanent magnets being arranged in the circumferential direction alternating with the plurality of divided cores;
• and
• a covering portion made of resin, the covering portion covering the plurality of permanent magnets,
• the plurality of permanent magnets is in surface contact with side surfaces of the divided cores in the circumferential direction in a state where facing magnetic pole faces of two permanent magnets arranged on both sides of each divided core in the circumferential direction are homopolar,
• the covering portion includes:
• a ring-shaped first part covering end surfaces of the plurality of permanent magnets on a first side in a lamination direction in which the plurality of first electric steel sheets is laminated;
• a ring-shaped second part covering end surfaces of the plurality of permanent magnets on a second side opposite to the first side in the lamination direction;
• a plurality of third parts that are equal in number to the number of the plurality of permanent magnets, correspond to the plurality of respective permanent magnets, are each provided between two divided cores adjacent to each other in the circumferential direction, and cover outer peripheral surfaces of the plurality of permanent magnets on an outer peripheral side in a radial direction with respect to the center of the shaft;
• and
• a cylindrical fourth part covering inner peripheral surfaces of the plurality of divided cores on an inner peripheral side in the radial direction, and inner peripheral surfaces of the plurality of permanent magnets on the inner peripheral side in the radial direction,
• in the covering portion, the first part, the second part, the plurality of third parts, and the fourth part are integrated with one another, and
• in the plurality of divided cores, outer peripheral surfaces of the divided cores on the outer peripheral side in the radial direction are exposed without being covered by the covering portion.