Bearing box structure of centrifugal compressor

The utility model provides a centrifugal compressor bearing box structure which relates to the technical field of compressors and comprises a base, a bearing box, a high-speed rotating shaft and a supporting assembly, the top of the base is connected with the bearing box, one side of the bearing box is connected with the compressor, the high-speed rotating shaft is arranged in the bearing box, one end of the high-speed rotating shaft is connected with an impeller, and the impeller is located in the compressor. The supporting assembly is arranged between the bearing box and the high-speed rotating shaft and used for better supporting the high-speed rotating shaft, and therefore the high-speed rotating shaft is prevented from shaking when rotating. According to the bearing box structure of the centrifugal compressor, the front supporting bearing, the rear supporting bearing and the thrust bearing are additionally arranged in the bearing box, the size of the bearings can be increased, the contact area between th