Single-system oil pump vehicle system suitable for airplane

The utility model provides a single-system oil pump vehicle system suitable for an airplane, which is characterized in that an oil tank is connected with a main oil pipe through an oil suction filter, a first electric three-way ball valve is mounted on the main oil pipe, the first electric three-way ball valve is connected with a motor pump set through a pump set oil suction hose, and an oil outlet of the motor pump set is connected with a one-way valve through a pump set oil outlet hose; the one-way valve is connected with a safety valve and a flow meter simultaneously after passing through a primary filter and a secondary filter, the flow meter is connected with a two-position two-way electromagnetic valve and an oil supply hose simultaneously, an oil supply connector is installed on the oil supply hose, an overflow port of the safety valve is connected with an oil return pipe, and the oil return pipe is provided with a sampling valve and a granularity detector. The oil return pipe is connected with the oil