During machining and assembling of gear drive system, there is deviation between actual and theoretical center distance of gear due to such factors as machining error, installation error of center distance and manual adjustment of center distance.In previous dynamic models,
Because the dynamic change of meshing parameters caused by the change of center distance is neglected, the influence of the change of center distance on the dynamic load of gear can not be analyzed.Based on the proposed nonlinear dynamic model, the influence of distance deviation on dynamic load is further studied. The range of center distance deviation is [-0.1mm, 0.5mm], and the interval between values is 0.01mm.
The variation trend of dynamic load coefficient with center distance deviation is shown in the figure.It can be seen from the diagram that the dynamic load coefficient of gears increases approximately linearly with the increase of center distance deviation.When the center distance deviation is -0.1mm, the dynamic load coefficient is 2.36, when the center distance deviation is 0.5mm, the dynamic load coefficient is 2.66, increasing by 13%.
Under different center distance deviations, the time-domain curves of engagement force, engagement stiffness, tooth side clearance and engagement angle are shown in the figure. In the figure, the direction of arrow changes with the increase of the center distance deviation from -0.1mm to 0.5mm.It can be seen from the diagram that the variation of the center distance deviation causes the variation of several engagement parameters at the same time.As the center distance deviation increases, the engagement force, tooth side clearance and engagement angle also increase, while the amplitude of engagement stiffness in the single and double teeth engagement area decreases gradually.