The utility model discloses a hydro-pneumatic spring with a heat dissipation function, and belongs to the technical field of hydro-pneumatic springs. The device comprises a hydro-pneumatic spring body, a floating
piston, a one-way
check valve, a cooler and a pipeline
system. The floating
piston achieves oil-gas isolation, the main
piston divides an inner cavity of the cylinder body into a center cavity and an annular cavity, and the center cavity and the annular cavity are communicated through a
piston rod damping oil channel and an external pipeline. The core innovation is that in the
active cooling circulation, in the compression
stroke, hot oil in a central cavity is pressed out, is forcibly guided into an external cooler through a one-way
check valve to be cooled, and then is injected into an annular cavity; and in the stretching
stroke, the oil flows back to the central cavity through the damping hole. By means of the structure, a double heat dissipation mechanism combining cylinder
barrel convection radiation heat dissipation and oil liquid replacement
convection heat dissipation is formed, the limitation that a traditional hydro-pneumatic spring only relies on a cylinder body for heat dissipation is broken through, the temperature of oil liquid and gas can be actively and efficiently controlled, temperature rise is remarkably restrained, and sealing reliability and
system work stability are guaranteed.