Cooling and micro-motion abrasion preventing structure of counter-rotating local fan bearing

The utility model discloses a cooling and micro-motion abrasion preventing structure of a counter-rotating local fan bearing. The Cooling and micro-motion abrasion preventing structure comprises a fan outer cylinder, an air inlet flow collecting cylinder, an air outlet diffusion cylinder and a fan motor, wherein space distances exist between the air inlet flow collecting cylinder and a fan motor shell and between the air outlet diffusion cylinder and the fan motor shell in the axial direction, the center of the round head of the air inlet flow collecting cylinder and the center of the round head of the air outlet diffusion cylinder are provided with an air passing hole, a first nut is fixedly arranged on the inner side of the air passing hole, and the first nut and the air passing hole are concentric. The end face of a non-shaft extending end of a fan motor rotor stretches out of a bearing outer cover of the fan motor, and the shaft end face is provided with a central hole; a fixing rod penetrates through the