Hydraulic press with spring seal piston structure

The utility model discloses a hydraulic press with a spring sealing piston structure, which comprises a hydraulic cylinder and a piston rod, a piston is arranged at the end of a pressure transmission shaft of the piston rod, a sealing cavity is arranged on the outer wall of the piston, and a spring ring is arranged in the sealing cavity. The spring ring comprises a spring ring sealing lip part and a spring ring outer sleeve which is arranged on the sealing lip part and is provided with a C-shaped opening, and a metal spring is arranged in the C-shaped opening. A spring seal type sealing device is adopted on the piston rod of the hydraulic machine to improve the sealing effect of the piston rod and the hydraulic cylinder, the spring seal is of a C-shaped opening structure, and openings face the upper pressure cavity and the lower pressure cavity respectively, so that liquid pressurization is achieved, the sealed position is pressurized accordingly, and the automatic sealing effect of large-range pressure is ac