Ship low-speed machine electric-hydraulic control oil inlet proportional valve

The invention relates to a ship low-speed machine electric-hydraulic control oil inlet proportional valve. A servo control valve assembly and a fuel control valve assembly are included. The servo control valve assembly comprises a servo oil inlet, a servo oil return port, a pressure reduction valve assembly, a proportional electromagnet, a proportional pressure reduction valve assembly and a piston assembly. The servo control valve assembly is used for adjusting the servo oil pressure, servo oil can directly flow in from a low-speed machine servo system high-pressure oil source, and additionalarrangement of a servo oil source is not needed. Fuel is guided in from the fuel control valve assembly, fuel is different from servo oil in oil way, servo oil and fuel mixing is avoided, and accordingly fuel is prevented from being polluted by servo oil. By adoption of the electric-hydraulic servo control manner, an electromagnetic element of a servo control valve can be prevented from making direct contact with heavy o