Bidirectional Output Mixed Hydraulic Power System

A bidirectional output mixed hydraulic power system, comprising:

• a fluid tank, which contains and stores a hydraulic fluid;
• at least one electrical hydraulic pump, which is connected to the fluid tank to draw in, pressurize, and output the hydraulic fluid;
• at least one mechanical hydraulic pump, which is connected to the fluid tank to draw in, pressurize, and output the hydraulic fluid;
• at least two sequence check valves, each of which is connected to the electrical hydraulic pump and the mechanical hydraulic pump, each of the sequence check valve being set in a normally open condition in a first direction and in a non-returning condition in a second direction;
• and
• a dual pressure valve, which is connected to the fluid tank and each of the sequence check valves for switching output direction of the hydraulic fluid;
• wherein the electrical hydraulic pump comprises at least two electrical hydraulic pump fluid outlets in different directions, the mechanical hydraulic pump at least comprising a mechanical hydraulic pump outlet, the dual pressure valve at least comprises dual pressure valve fluid inlets and a fluid return ports, the electrical hydraulic pump fluid outlets, the mechanical hydraulic pump outlet, and the dual pressure valve fluid inlets being respectively connected to the sequence check valves, the fluid return port of the dual pressure valve being connected to the fluid tank, each of the sequence check valves comprises a first fluid inlet connected to the respective one of the electrical hydraulic pump fluid outlets, a second fluid inlet connected to the mechanical hydraulic pump outlet, and a common fluid outlet connected to respective one of the dual pressure valve first fluid inlets, the mechanical hydraulic pump is further connected to a manually-operating direction-switching valve, the manually-operating direction-switching valve comprising a direction-switching fluid inlet connected to the mechanical hydraulic pump outlet, direction-switching fluid outlets respectively connected to the second fluid inlets of the sequence check valves, and a manually-operating controller selectively connecting the direction-switching fluid outlets to the direction-switching fluid inlet.