The Strength Analysis On Curved Geartype Coupling Of The Rolling Mill Main Drive System

The surface of tooth crest and tooth root for outer gear shaft sleeves of curved toothcoupling are arc in long direction as well as the the gear side, which can overcome theedge-stuck phenomenon of tooth end when the inclination exists between the annular gearand external gear shaft sleeve. In the case of a certain angle between the axis,contact situation on the tooth surface can be improved. Compared to the ordinary straighttooth coupling shaft, the bearing capacity can be increased by15%~20%under thecondition of the same work. With the advantages such as good axis compensationperformance, compact structure, high bearing capacity, high efficiency, long life and so on,curved tooth coupling is widely used in heavy machinery and metallurgical machinery.Taking the F1-F4curved-tooth gear coupling of finishing mill group of2250hot rollingmill as the research object, the main research contents and conclusions are as follows.1) The basic parameters of gear pair for curved-tooth gear coupling have beencalculated. The3D model of the internal and external meshing gear forcurved-tooth gear coupling has been built by Pro/E software, and based on meshing theoryof the helical gears, the three-dimensional model has been assembled with noneinterference.2) Putting the3D model into finite element software，the bearing capacity of theinternal and external gear in different angle of curved-tooth gear coupling has beenanalyzed, and the strength check of gears have been done.3) The relationship between gear bearing capacity and dip angle ofcurved-tooth gear coupling has been obtained, and it can provide theoretical basis foractual production.