Commonly used computers cooling fans have three types of bearings arranged on their axes:

The first is the oil bearing, also known as non-oil bearing, because the fan does not stop running, the grease in the inner seal evaporates, thus losing its lubricating effect and having a very short service life.

The second is that the ball bearing is matched with the oil-containing bearing.Since the two bearings are arranged in series, it is not easy to generate concentricity after the fan shaft center penetrates, causing unsmooth rotation and noise.

The third is that the two ball bearings are arranged in series so as to make the fan axis penetrate.Because the cost is too high, it is uneconomical, and it is easily damaged by external force to generate noise.

An improved computer heat dissipation fan is designed, which comprises a frame seat, a fan, a ball bearing, an elastic component, a retaining ring and a positioning cover.By adjusting the height of the positioning cover, the prepressing stress applied to the ball bearing by the elastic component is controlled to achieve the purpose of adjusting and fixing the rotating speed of the fan.

The improved computer heat dissipation fan comprises a frame seat, a fan and a ball bearing, wherein the center of the bottom of the frame seat is provided with a tube seat and an exhaust hole; the outer side of the tube seat is annularly provided with a stator; the fan is a fan blade provided with a bearing groove; the inner wall of the bearing groove is provided with a rotor; the center of the bearing groove is vertically provided with an axial center; the improved computer heat dissipation fan is characterized in that the top edge of the tube seat is provided with an inner flange; the bottom edge of the tube seat is provided with an internal thread; a buckle groove is formed on the axial center of the fan; and the outer edge of one end The shaft center passes through the ball bearing, the elastic component is limited between the ball bearing and the retaining ring by the retaining ring clamped in the retaining groove, the positioning cover is screwed on the internal thread of the pipe seat, and one end of the positioning cover is provided with a concave socket; The other end of the positioning cover is provided with a bearing groove for the tool to rotate.

The main advantage of the improved computer cooling fan is that it has the effect of adjusting and fixing the rotating speed of the fan. But also has the advantages of improving the operation stability and the service life of the bearing, preventing the axial center from swinging, reducing the shaking of the fan blades, reducing the noise of the fan, improving the manufacturing excellent rate and the like.