Roll shaft assembly of sheet machine

The utility model relates to a roll shaft assembly of a sheet machine, which mainly solves the problem that the cooling of a roll shaft of the prior roll shaft assembly of the sheet machine in the axial direction is non-uniform and is characterized in that a water inlet cooling channel (5) and a water return cooling channel (6) are arranged between a liner (3) and a roller (4) at intervals along the circumferential direction and communicated at the end of a closed shaft head (2); an annular cavity (9) is arranged between a water pipe (8) and a cooling water shaft head (1) which is radially and evenly provided with a water inlet channel (10) and a water return channel (11) which are mutually staggered along a center hole (7); and the water inlet channel (10) and the water return channel (11) are respectively communicated with the water inlet cooling channel (5) and the water return cooling channel (6) and communicated with the water pipe (8) and the annular cavity (9). The roll shaft assembly of the sheet mach