关键词: 外笼型转子磁力耦合器, 温升, 斜翅片, 散热效率

Abstract: Aiming at the problem of large temperature rise caused by thermal power consumption in the speed regulation state of the outer cage rotor magnetic coupler, the heat dissipation fins were installed outside the outer rotor to reduce the temperature rise. Due to the large rotation speed of the magnetic coupler, the strength of the traditional straight fin root was required to be high. Combined with the working principle of the magnetic coupler, an oblique fin was proposed
to improve the axial air flow and improve the heat dissipation efficiency. The material, tilt angle and fin spacing were studied and designed respectively. The results show that under the premise of determining the processing size, when the heat dissipation area was the same, the oblique fins need less processing materials than the straight fins. The fin angle with the best heat dissipation efficiency was 60° and the permanent magnet temperature was reduced by about 12. 75 ℃ . By changing the fin spacing ( that was changing the total heat dissipation area) , the optimal fin spacing was 6 mm, and the heat dissipation capacity was about 10% higher than other spacing. The difference between the theoretical calculation value and the simulation value was about 6. 34%, which was in line with the design expectation.

Key words: outer cage rotor magnetic coupler, temperature rise, oblique fin, heat dissipation efficiency