Deceleration and return air hydraulic control system of unmanned aerial vehicle (UAV) ejection device

The invention discloses a deceleration and return air hydraulic control system of an unmanned aerial vehicle (UAV) ejection device, and the system comprises an electromagnetic unloading overflow valve of a main oil pump, the main oil pump, a motor of the main oil pump, an electromagnetic unloading overflow valve of an oil filling pump, the oil filling pump, a motor of the oil filling pump, a cartridge valve, a first one-way valve and a safe valve thereof, a hydraulic motor, an electro-hydraulic proportional cartridge valve, a first electromagnetic reversing valve, a first governing valve, a safe and stop valve block, a second one-way valve, a third one-way valve, an energy accumulator, a second governing valve, a second electromagnetic reversing valve, a fourth one-way valve, a first proportional overflow valve, a safe valve of the proportional overflow valve, a buffer braking hydraulic cylinder, a third electromagnetic reversing valve, a fifth one-way valve, a second proportional overflow valve, an emergency braking hydraulic cylinder, an oil tank and oil tubes which are communicated among all the parts. According to the deceleration and return air hydraulic control system of the UAV ejection device, the proportional overflow valves are adopted to control the hydraulic cylinders, so that the stable deceleration and braking of a sliding trolley is realized, and the reliability of the system is improved; an emergency braking unit and a buffer braking unit are adopted to form two stages of braking, so that the high reliability in the braking of the sliding trolley is ensured; a return control unit is adopted, so that the return speed of the sliding trolley can be governed.