The invention relates to an extrusion granulating device, in particular to a gear pump device in a large extruding granulator unit. Speed control system for gear pump of extrusion granulation unit, gear pump is connected with gear pump at the front barrel outlet, gear pump is connected with gear pump rear barrel, gear pump motor is connected with speed control device, gear pump front barrel is equipped with melt pressure sensor, melt pressure sensor measures the actual value of melt pressure at the inlet of gear pump, and this pressure The signal is output to the controller, and the controller is driven to connect the speed regulating device after signal processing. Compared with the existing manual operation to control the inlet pressure of the gear pump, the invention has the advantages of automatic operation, prompt and accurate operation, fast response speed, small overshoot and high control stability and precision, and the inlet pressure of the gear pump device can be kept stable by controlling the melt pressure at the inlet of the gear pump to control the speed of the gear pump motor.

Speed extrusion gear pump systems

The speed control extrusion gear pump systems is extruded, and the gear pump is connected with the gear pump at the front outlet of the gear pump.

Gear pump connects gear pump rear cylinder.

Gear pump motor.

The utility model is characterized in that the melt pressure sensor is installed on the front barrel of the gear pump to measure the actual melt pressure at the inlet of the gear pump, and the pressure signal is output to the controller.

The controller is connected with the timing device after signal processing.

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