Machine -oil pump

The utility model discloses a machine -oil pump belongs to the engine technology field, including the machine -oil pump body, be equipped with machine -oil pump oil inlet and machine -oil pump oil -out on the machine -oil pump body, the machine -oil pump body is inside be equipped with the external rotor and with the inner rotor of external rotor looks adaptation, form machine -oil pump oil feed chamber and machine -oil pump play oil pocket between external rotor and the inner rotor, machine -oil pump oil feed chamber is close to the machine -oil pump oil inlet sets up, machine -oil pump goes out the oil pocket and is close to the machine -oil pump oil -out sets up, this internal main oil gallery voltage limiting valve and special oil duct of being equipped with of machine -oil pump, main oil gallery voltage limiting valve passes through special oil duct links to each other with the main oil gallery. The utility model discloses under the prerequisite that satisfies the engine oil demand, main oil gallery voltage limiting valve has integrateed for compact structure has also reduced the step of assembling when having reduced the spare part design, the formula of letting out in the valve of main oil gallery voltage limiting simultaneously adopts has improved machine -oil pump's efficiency.