Study on Dynamic Characteristics of Planetary Drive in Cutting Section of Coal Mining Machine Considering Flexibility of Toothed Ring
In order to study the response characteristics of the planetary drive system of the cutting section of the coal mining machine under the two coal body conditions of homogeneous coal seam and gangue coal seam,the translational-torsional coupling dynamics model of the planetary drive of the cutting section,which takes into account the flexibility of the tooth ring,is established by taking into account the support stiffness of the components,the meshing rigidity of the tooth and the tooth ring flexibility and other factors.Rigid/flexible ring planetary drive system in two kinds of coal body working conditions in the sun wheel and planetary wheel meshing force fluctuation characteristics,the planetary frame transmission speed change rule and the sun wheel center floating trajectory curve were analyzed.It is found that the amplitude of the meshing force between the sun wheel and the planetary wheel is fluctuating in a long period under the state of flexible ring,and the flexibility of the ring under the condition of homogeneous coal seam improves the state of the meshing force of the two wheels and has a certain stabilizing effect on the fluctuation of the planetary rack output speed,and the research results can provide a certain theoretical guidance for the design of the transmission system.
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