End cover fixing structure of cylindrical centrifugal compressor and cylindrical centrifugal compressor

The utility model provides an end cover fixing structure of a barrel-type centrifugal compressor and the barrel-type centrifugal compressor, belongs to the technical field of centrifugal compressors, and aims to solve the problems of high processing difficulty and high weight of the whole machine. The end cover fixing structure of the cylindrical centrifugal compressor comprises a receding groove, a mounting groove, a clamping ring and a shear ring. The receding groove is formed in the edge of the outer side end face of the end cover in the circumferential direction of the end cover. The mounting groove is formed in the inner wall of the compressor shell in the circumferential direction of the compressor shell. And the clamping ring is accommodated in the mounting groove and is clamped in the abdicating groove. The shear ring is contained in the mounting groove and abuts between the clamping ring and the side wall of the mounting groove. According to the invention, under the condition that the internal space