Nanjing HONE Twin Screw Extruder with Bilateral Symmetrical Drive Transmission Box




The transmission box is the core component of the parallel twin-screw extruder. In contrast to other models, twin-screw extruders require an even distribution of torque power to the two screws in a confined space. Different torque distribution technologies determine the bearing capacity of the gearbox and even directly affect the life and performance of the whole machine.

The traditional parallel three-axis torque distribution technology is a mature twin-screw extruder transmission technology, foreign twin-screw extruder gearbox early mostly used this structure. Due to the limited center distance, the torque transmitted by the gear on the output shaft is the bottleneck of the bearing capacity.

In order to improve the torque, the bilateral symmetrical drive structure was born later. The separate transition shaft system is changed into the upper and lower two transition shaft systems to drive the gears on the output shaft from the upper and lower directions. In theory, the bearing capacity of the gear on the output shaft is only 50% of the traditional parallel three-axis type. At the same time, because the two transition axes are symmetrically distributed on the output shaft, the radial force of the output shaft is completely offset, forming an ideal couple drive, and the life of the output shaft has been greatly improved.

Since the upper and lower transition shaft CD and the output shaft AB are not on the same plane, the bilaterally symmetrical driving structure is relatively complicated, the assembly is difficult, and the manufacturing cost is high. There are three assembly surfaces in actual operation, which affect the assembly accuracy and assembly efficiency.