An improved structure for rotational support for a heat-dissipation fan is disclosed,
comprising a hollow ceramic bearing passing through and concentric with the fan
rotor and rotating with said rotor, a hollow ceramic support bearing fixedly mounted
to the base of the fan, and a hollow or solid ceramic axle tube passing through
the inside of said bearing and rotating freely to reduce friction and allow high-speed
rotation. The exterior surface of said bearing is ground or otherwise formed to
provide better connection with the rotor, while the interior of the bearing and
exterior of the axle tube are further processed to reduce contact area therebetween
to reduce rotation friction. This improved structure has achieved reduced friction,
reduced noise, reduced power consumption, longer life and higher rotational speed.
