狭缝和气膜尺寸对气浮陀螺仪涡流力矩的影响

Effects of Slit Width and Film Thickness on Vortex Torque of Air Supported Gyroscope

为提高气浮陀螺仪漂移精度,采用有限元方法,研究狭缝宽度和浮子轴颈气膜厚度对气浮陀螺仪承载力、刚度以及涡流力矩的影响。结果表明,节流狭缝宽度和气膜厚度对气浮轴承承载力、刚度和涡流力矩等特性影响显著。在狭缝宽度为5～15μm和气膜厚度为10～30μm的区间内,通过分析两者的数值对气浮陀螺仪刚度和涡流力矩的影响,得到狭缝宽度和气膜厚度的合理匹配关系。并考虑加工难易程度以及制造误差对涡流力矩的影响,得出合理的数值匹配,即狭缝宽度为7～8μm和轴颈气膜厚度为15～18μm。

In order to improve the drift precision of air supported gyroscope, the effects of slit width and journal film thickness on load-carrying capacity, stiffness and vortex torque of air supported gyroscope were studied by using finite element method. Result shows that slit width and journal film thickness have obvious effect on load-carrying capacity, stiffness and vortex torque of air supported gyroscope. When slit width is between 5 - 15 μm and journal film thickness is between 10 -30 μm, the relation between slit width and film thickness is obtained by analyzing their effects on stiffness and vortex torque of air supported gyroscope. Considering the effects of manufacturing errors on vortex torque, reasonable slit width and film thickness was selected as that slit width is 7-8μm and film thickness is 15 - 18 μm.