Centrifugal fan for converter of intercity motor train unit

The utility model provides a centrifugal fan for a converter of an intercity motor train unit. An impeller of the ventilator is fixedly installed on a shaft extension of the driving motor, the impeller is designed to be a centrifugal impeller with an inclined rear wheel disc, an air inlet channel is partially inserted into a front wheel disc of the impeller to form partial overlapping to form a non-contact transition structure, a rear end cover of the driving motor is partially arranged outside the volute assembly, and the axial space occupied by the driving motor in the volute assembly is saved. During use, the fan impeller rear wheel disc is designed to be of an inclined structure, and the peripheral space of the motor is fully utilized for containing the impeller outlet axial space. Onthe premise that the outlet width of the impeller meets the aerodynamic performance requirement of the draught fan, the rear wheel disc forms the convex wheel disc, the axial space of the wheel disc partially coincides with t