Roll hydraulic motor

The utility model relates to a roller hydraulic motor which is used for changing the potential energy of high-pressure liquid or gas into the mechanical rotary movement. An outer sleeve and an end cover form a sealed fixed part, and a passage for feeding and discharging liquid is arranged in the inner wall of the outer sleeve. A rotation part is provided with a shaft, keys, an impeller wheel, a spring and rollers, and axial grooves are evenly distributed on the impeller wheel. The rollers are arranged in the grooves, and the spring enables the rollers to be tightly adhered with the inner wall of the outer sleeve. High-pressure oil pushes the impeller wheel and the rollers to rotate continuously. Because the rollers replace traditional vanes, the efficiency of the motor is greatly enhanced.