| 摘要 |
A heat insulation structure for cooling fan includes a base, a blade hub, and a stator. The base has a ceramic bearing sleeve, which defines an axial inner space for receiving at least one bearing therein. The bearing has an axial shaft hole; and a heat insulating nanomaterial is applied between the bearing and the bearing sleeve. The blade hub has a plurality of blades and a rotor shaft provided thereon. The rotor shaft has an end connected to the blade hub and another end inserted in the shaft hole on the bearing. The stator is fitted around the bearing sleeve, and a heat insulating nanomaterial is applied between the stator and the bearing sleeve. The ceramic bearing sleeve and the heat insulating nanomaterial together protect the bearing against damage caused by heat produced by windings wound around the stator to thereby largely increase the lifetime of the cooling fan.
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