Shearer cutting part is a rocker gear box. The rocker box is a hollow cantilever structure, the free end of which bears the heavy load and strong impact load of the cutting drum, and the multi-stage gear transmission is installed inside. Therefore, the three-dimensional dynamic deformation of the rocker box and its dynamic coupling with the multi-stage gear transmission can not be ignored. However, the existing research on cutting gear dynamics lacks the analysis of the coupling response characteristics of multi-stage gear transmission and box, especially the revealing of the coupling mechanism.
By means of natural vibration analysis and system dynamics simulation, the dynamic coupling characteristics of multi-stage gear transmission and rocker box are revealed.
Firstly, the natural vibration characteristics of rocker box, multi-stage gear transmission and multi-stage gear transmission box coupling system are calculated respectively, and the influence of coupling rocker box on the natural vibration characteristics of multi-stage gear transmission is analyzed by using the characteristics of natural frequency, vibration mode and modal strain energy.
Then, the dynamic deformation, dynamic load and vibration acceleration of the system at different speeds are solved, and the influence of the rocker box flexibility on the dynamic simulation results is analyzed.