FULLY CLOSED MOTOR DEVICE

摘要

PROBLEM TO BE SOLVED: To efficiently cool a bearing on a load side. SOLUTION: A fully closed motor device includes a rotor 12 rotating around the rotary shaft 10 supported with a bearing 16, a bearing housing 18 to which the bearing 16 is fixed, a blow part 20 disposed in the vicinity of the rotary shaft 10 end on the anti-load side of the rotor shaft 10 for blowing air to the load side, and the main frame 15 configured to extend in the direction of the rotary shaft 10 to cover the rotor 12 and to which the bearing housing is fixed. Heat transfer fin groups 31 to 34 are disposed on the outer circumferential surface of the main frame 15. Ventilation piping 41 to 44 are disposed between the heat transfer fin groups 31 to 34 adjacent with each other on the outer circumference of the main frame 15. The ventilation pipes 41 to 44 extend in the direction of the rotary shaft 10 to allow the air blown from the blow part 20 to circulate therein. The downstream air circulated in the ventilation piping 41 to 44 passes in the vicinity of the bearing housing on the load side. COPYRIGHT: (C)2010,JPO&INPIT