Fan assembly and dust collector with same

The invention discloses a fan assembly and a dust collector with the same. The fan assembly comprises a shell, an impeller assembly, a first flow guide part, a driving part, a bearing seat and a first bearing. Wherein at least part of the impeller assembly is contained in the shell, the impeller assembly comprises a plurality of impellers which are arranged in series in the airflow flowing direction of the draught fan assembly, the first flow guiding part is suitable for guiding and discharging air discharged by the impeller on the upstream side to the impeller on the downstream side, the driving part is used for driving the impellers to rotate, and the bearing seat is detachably arranged on the first flow guiding part; the bearing seat is provided with a bearing installation groove for containing the first bearing, and the output shaft of the driving piece penetrates through the first bearing. According to the fan assembly, the acting force transmitted to the first bearing by the output shaft of the driving