Axial balancing device of vertical centrifugal compressor

The utility model discloses an axial balancing device of a vertical centrifugal compressor. The axial balancing device comprises an impeller (1) and an impeller inlet axial seal (4) arranged at the inlet end of a front disc of the impeller (1). An impeller rear disc radial seal (2) and an impeller front disc radial seal (3) are further included; the impeller rear disc is radially sealed and fixedat the rear disc outlet end of the impeller, the impeller rear disc is radially sealed, and a rear disc cavity (P1) is formed between the impeller rear disc and an upper part of the impeller; a plurality of through holes (11) are formed in a rear disc of the impeller and are communicated with the rear disc chamber; the impeller front disc is fixed to the front disc outlet end of the impeller in aradial sealing mode, the impeller front disc is sealed in the radial direction, a front disc cavity (P2) is formed between the impeller front disc and a lower part of the impeller, and the front disccavity is communicated with