A series of research work has been carried out on the dynamic modeling analysis and dynamic performance optimization of multi-stage gear transmission box coupling of shearer cutting part, and some research results have been obtained. However, due to the complex structure and working condition of the cutting part, there...
① Aiming at the problems of modeling difficulty and low computational efficiency of multi-stage gear system dynamics, an efficient general modeling method is proposed. In this method, a unified writing form of linear or nonlinear dynamic models of each component in the gear system is designed, which makes the...
With the continuous increase of mining depth, the geological characteristics of high ground stress and strong mining disturbance in deep coal seam make the operation task of shearer more complex. Shearer cutting part is a multi-stage gear transmission system with cantilever box. Its complex structure and frequent faults seriously...
As shown in Figure 1, it is the contour map of CHTE under different profile modification parameters of gear pair 3, and the minimum value area in the figure represents the best combination of profile modification parameters. Figure 1 (a) shows the CHTE contour of gear pair 3 without...
The dynamic performance of shearer cutting part is improved from two aspects of rocker box structure optimization and multi-stage gear three-dimensional topology modification ① In order to improve the low-order natural frequency, the structure of the rocker box is optimized, and the deformation of the rocker box and the...
It is well known that the optimum amount of tooth direction modification varies with the meshing tooth direction error and tooth force, but the law of variation is not clear. It is helpful to estimate the change trend and value of the optimum tooth profile modification amount under different...
By means of natural vibration analysis and system dynamics simulation, the coupling dynamic characteristics of multi-stage gear transmission and rocker box are revealed ① The natural vibration characteristics of rocker box and multi-stage gear transmission are calculated respectively. The natural frequency and vibration mode of the rocker box (condensation...
Adjust the synchronous speed of the motor so that the speed of the motor under rated load can be increased from 500 R / min to 1100 R / min within 70 s. In order to eliminate the influence of external excitation on the simulation results, the roller load...
Adjust the synchronous speed of the motor to 150, 500, 750, 1250, 1470, 1750 and 2000 R / min respectively under the rated load (1470 occurs instead of 1500 because the cutting motor speed under the rated condition is 1470), and take the load fluctuation coefficient as 0.2. ①...
The dynamic response characteristics of shearer cutting part under rated working condition are analyzed, and the dynamic deformation and dynamic load changes of multi-stage gear transmission before and after coupling rocker box are compared. Under the rated condition, it is not found that the coupling rocker box has obvious...