Self-cooling hydraulic retarder

The utility model relates to the technical field of hydraulic retarders, and discloses a self-cooling hydraulic retarder which comprises a liquid storage tank, an end cover, a suction assembly, a stator and a rotor. The liquid storage tank and the end cover are connected in a matched mode to form an installation cavity, the stator and the rotor are installed in the installation cavity in a matched mode, the stator and the rotor are matched to form a working cavity, and the suction assembly is installed on the liquid storage tank. A suction loop is formed among the liquid return end of the liquid storage tank, the suction assembly, the liquid return end of the end cover and the liquid outlet end of the working cavity, and the suction assembly is used for sucking part of liquid flowing out of the working cavity back into the liquid storage tank through the suction loop when the self-cooling hydraulic retarder is subjected to retarding braking unloading. According to the utility model, the problem that part of l