The invention discloses a heat dissipation device for a hydraulic
system. The heat dissipation device comprises a water-cooled engine water tank heat dissipation device and the hydraulic
system, wherein the hydraulic
system is externally connected with a circulating oil
pipe, the circulating oil
pipe is arranged in the water-cooled engine water tank heat dissipation device, a cavity is arranged above the water-cooled engine water tank heat dissipation device, the hydraulic system and end parts, which are connected with two ends of the hydraulic system, of the circulating oil
pipe are both located in the cavity, and the circulating oil pipe is arranged in the water-cooled engine water tank heat dissipation device and is of a
helical structure. According to the heat dissipation device for the hydraulic system, disclosed by the invention, the circulating oil pipe is set to be a
helical shape, thus the time that the circulating oil pipe passes through the water-cooled engine water tank heat dissipation device is increased, the heat dissipation effect of the hydraulic system is greatly increased, the cavity is arranged above the water-cooled engine water tank heat dissipation device and is used for placing the hydraulic system, the whole heat dissipation device is simpler, the area of the hydraulic system does not need to be increased, the cost is correspondingly reduced, meanwhile, the temperature of the water-cooled engine water tank heat dissipation device can be instantaneously reduced by the design of a
refrigeration layer, and the heat dissipation effect is further increased.