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Theoretical analysis of compliance and dynamics quality of a lightly loaded aerostatic journal bearing with elastic orifices
Precision Engineering ( IF 3.5 ) Pub Date : 2020-12-04 , DOI: 10.1016/j.precisioneng.2020.11.012
Vladimir Kodnyanko , Stanislav Shatokhin , Andrey Kurzakov , Yuri Pikalov

Active aerostatic bearings, the main advantage of which is their ability to provide negative compliance, are gradually being used in metal-cutting machines as load-bearing structures and as automatic compensators for the deformation of their technological system. The disadvantages of such bearings are an increased tendency to instability and poor dynamics quality. The article proposes a new design and method for improving the quality of the dynamics of aerostatic bearings. The study was made based on the static and dynamic characteristics of an active radial aerostatic bearing, which compensates for lubricant consumption by elastic orifices. The design implements the principle of combined external throttling, the use of which makes it possible to obtain high-quality characteristics in the low, zero, and negative compliance modes of the carrier lubricating gap. It was also established so that the design with rigid orifices provides ideal dynamics quality and can be used instead of conventional aerostatic bearings with simple or ring diaphragms.



中文翻译:

带有弹性孔的轻载静压轴颈轴承柔顺性和动力学质量的理论分析

主动空气静压轴承的主要优点是其提供负柔度的能力,正逐渐在金属切割机中用作承重结构和技术系统变形的自动补偿器。这种轴承的缺点是不稳定的趋势增加,并且动力学质量较差。本文提出了一种新的设计和方法,以改善空气静压轴承的动力学质量。该研究是基于主动径向空气静压轴承的静态和动态特性进行的,该特性可以补偿弹性孔口对润滑剂的消耗。该设计实现了组合外部节流的原理,该原理的使用使得可以在低,零,载体润滑间隙的负顺应模式。还建立了具有刚性孔口的设计,以提供理想的动力学质量,并且可以代替具有简单或环形隔膜的常规空气静压轴承使用​​。

更新日期:2020-12-08
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