Abstract
Most of the time, mass eccentricity, and misalignment exist at the same time with aviation spline coupling working. Therefore, in this paper, the function of dynamic meshing force between multi-teeth and a non-linear dynamic model of involute spline coupling system in aero-engine with mass eccentricity and misalignment were presented. And then, the non-linear dynamic meshing force of spline coupling in aero-engine on different misalignment and mass eccentricity was investigated. The result shows that when the mass eccentricity and the misalignment are both small, the aviation involute spline coupling can run steady. And with the increase of mass eccentricity or misalignment, the dynamic load coefficient of the aviation involute spline coupling gradually increase. At the same time, as the mass eccentricity or misalignment increases, some teeth suffer more load, some teeth suffer less load, and some teeth are out of engagement so that they do not suffer any load. The running state of spline coupling becomes more and more unstable.
Highlights
Involute spline coupling of aero-engine are suffering periodic fluctuation loads while taking-off, cruising, and landing
When the mass eccentricity is r1 = 2 3 10À4 m, r2 = 0, ly = 0, the results of total nonlinear dynamic meshing forces in the x-axis direction, frequency spectrum corresponding it, and dynamic load coefficient of the aviation involute spline coupling under different misalignment lx are shown in Figures 14 to 19
The number of the teeth loaded of the spline has a further reduction, and the difference of the load between each tooth is increased too. It can be concluded by investigating the nonlinear dynamic load of involute spline coupling in aeroengine with mass eccentricity and misalignment that: (1) when the mass eccentricity and misalignment were all small, the total meshing force in the xaxial direction and dynamic load coefficient of the aviation involute spline coupling are relatively stable
Summary
Involute spline coupling of aero-engine are suffering periodic fluctuation loads while taking-off, cruising, and landing.
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