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加工制造了两个不同轴承壳体圆柱孔内表面的表面粗糙度的波箔型径向气体轴承.在建立的波箔型径向气体轴承性能测试实验台上对预紧状态下两个波箔型径向气体轴承进行了静刚度测试实验,并利用摩擦力矩法测量了波箔型径向气体轴承的悬浮转速,通过对比两个轴承的实验结果分析了波纹箔片和轴承壳体之间的摩擦效应对轴承静刚度和悬浮转速的影响.结果表明:降低轴承壳体圆柱孔内表面的表面粗糙度能够减弱波纹箔片和轴承壳体之间的摩擦,减小了轴承静刚度,进而在轴承载荷相同的条件下有效降低了波箔型径向气体轴承的悬浮转速,减少了轴承表面磨损,对轴承结构设计和提高轴承寿命具有工程指导意义.此外,波箔型径向气体轴承的静刚度并不是线性的,而是随着箔片变形量的增大而增大,因此有必要在波箔型径向气体轴承理论建模时考虑箔片结构刚度的非线性特性.
Two different corrugated radial gas bearings were machined to manufacture the surface roughness of the inner surface of the cylindrical bore of two different bearing shells.Based on the experimental bench of the performance test of the radial foil bearing made of corrugated metal foil, Radial gas bearing static stiffness test, and the use of friction torque method to measure the radial velocity of the foil-type gas bearing suspension speed, by comparing the experimental results of two bearings analyzed between the corrugated foil and the bearing housing The results show that reducing the surface roughness of the inner surface of the cylindrical bore of the bearing shell can reduce the friction between the corrugated foil and the bearing shell and reduce the static stiffness of the bearing, Bearing under the same load conditions effectively reduce the foil-type radial gas bearing suspension speed, reducing the wear on the bearing surface, the bearing structure design and bearing life has an engineering significance. In addition, the radial foil bearing radial gas bearing static Stiffness is not linear, but increases with the amount of deformation of the foil, so it is necessary to consider the structural stiffness of the foil in the theoretical modeling of a radial foil bearing Nonlinear characteristics.