Variable-frequency speed control system of increasing gear-based novel hydraulic coupler

The utility model provides a variable-frequency speed control system of an increasing gear-based novel hydraulic coupler. The variable-frequency speed control system is characterized in that the conventional connection relation of a motor, an increasing gear-based scoop-tube-adjusted turbine hydraulic coupler and a drive load is unchanged, at the premise that the conventional system is kept, the technical improvement, particular to local improvement, is performed to the inside of the increasing gear-based scoop-tube-adjusted turbine hydraulic coupler, and an external auxiliary operating oil pump is added; in this way, the increasing gear-based scoop-tube-adjusted turbine hydraulic coupler is imparted a high-efficiency constant-speed output function, thereby adapting to the fact that the motor drives the load of the increasing gear-based scoop-tube-adjusted turbine hydraulic coupler through a frequency converter to meet the variable-frequency speed control requirement.