Inner circle grinding equipment for fan impeller polishing

The invention provides inner circle grinding equipment for fan impeller polishing, and relates to the technical field of fan accessory grinding, the inner circle grinding equipment comprises a bearing seat, and two sets of supporting frames are fixedly arranged on the two sides of the bottom of the bearing seat; a middle frame is fixedly arranged in the middle of the bottom of the bearing seat; the assembly gas ring is fixedly arranged in the middle of the top of the bearing seat; according to the bottom channel of each embodiment of the invention, a uniformly-controlled automatic floating grinding control structure is provided, the bottom end of an air control pipe is matched with an airtight bearing to be rotationally arranged at the front end of the top of the bottom channel, an air pushing piston communicates with a hexagonal piston cylinder, the air conveying effect is provided, and a linkage shaft A drives a transmission wheel and an eccentric pile to rotate when rotating; the eccentric pile drives the