Centrifugal compressor volute assembly

The utility model relates to a volute assembly of a centrifugal compressor. The volute assembly of the centrifugal compressor comprises a volute shell, a volute chamber is formed in the volute shell, a gas collecting opening is formed in the volute chamber, and the inner wall of the volute chamber comprises a drainage area located on one side of the gas collecting opening and extending in the radial direction and a vortex area connected with the drainage area and wound to the other side of the gas collecting opening; and the bushing assembly is fixedly connected to the gas collecting port, and the bushing assembly is provided with a drainage curved surface which is in smooth butt joint with the vortex area. According to the volute assembly of the centrifugal compressor, the drainage curved surface is arranged on the bushing assembly to guide the airflow direction and prevent airflow impact from disturbing and influencing the working efficiency of the compressor; through the split design of the lining assembly