CPU water-cooled heat radiator mounting structure

The utility model discloses a CPU water-cooled heat radiator mounting structure which comprises a heat radiator shell. A mounting cavity capable of containing an impeller is formed in the center of the heat radiator shell, a central hole is formed in the center of the impeller, a center shaft is arranged in the central hole, the upper end and the lower end of the center shaft are respectively provided with an annular groove, the upper end and the lower end of the center shaft are respectively sleeved with a ceramic shaft sleeve, and the ceramic shaft sleeves are limited on the two annular grooves respectively and press the upper end face and the lower end face of the impeller respectively. Through the structure, direct friction between the mounting structure and two end faces of the shaft sleeves is avoided, the stainless steel center shaft is easy to machine, low in cost and resistant to abrasion, and manufactured products are stable in performance. Therefore, the strength of a bearing is increased, the prob