Grinding device for inner wall of compressor cylinder body

The utility model provides a compressor cylinder body inner wall polishing device which comprises a base and a portal frame arranged on the base, a to-be-polished cylinder body to be polished is arranged in the portal frame, a clamping mechanism is arranged beside the to-be-polished cylinder body, a lifting mechanism is installed on the inner top wall of the portal frame, a straight rod is installed on the lifting mechanism, and the straight rod is connected with the portal frame. The four sides of the lower end of the straight rod are provided with two sets of grinding mechanisms and two sets of smoothness detection mechanisms correspondingly. The friction force between the friction block and the inner wall of the to-be-ground cylinder body is obtained by observing the movement condition of the counterweight piston in the capillary tube, and the friction force is determined by the smoothness degree of the inner wall of the to-be-ground cylinder body, so that the smoothness degree of the inner wall of the to-