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随着科学技术的迅速发展,气体轴承在精密加工设备和精密测试仪器方面将获得更广泛的应用。但是,在高速机械中,气体轴承涡动不稳定性却成为把它广泛应用的一个很大障碍。为了抑制这种涡动,近十多年来国内外已进行了多方面的研究,从结构设计、参数选择和工艺等方面都取得了不少成果,为抑制高速静压气体轴承的涡动不稳定性提供了一些有效的方法,如为了增加轴承的阻尼从而减小轴颈的涡动频率可采取下列三种形式:(1)在轴承面上开稳定腔,利用气膜压力相位滞后的“Sixsmith”的稳定元件,在透平膨胀机上应用收到良好的效果。(2)采用逆着轴颈旋向作切向供气,使间隙中气流发生改变的Tondl研究。(3)将轴套挠性地支持在“O”形橡皮卷上,用以吸收轴颈涡动的能量,从而提高涡动起始转
With the rapid development of science and technology, gas bearings in the precision machining equipment and precision test equipment will be more widely used. However, the instability of gas bearings in high-speed machines has been a major obstacle to its widespread use. In order to restrain this kind of eddy, many researches have been carried out at home and abroad in recent ten years, and many achievements have been made in structural design, parameter selection and technology. In order to restrain the eddy of high-speed static pressure gas bearing Stability provides some effective methods, such as increasing the bearing damping to reduce the journal eddy frequency can take the following three forms: (1) open a stable cavity in the bearing surface, the use of film pressure phase lag “ Sixsmith ”stable components, the turbo expander on the application received good results. (2) The Tondl study, which uses the tangential gas supply against the journal rotation to change the air flow in the gap. (3) The sleeve is flexibly supported on the “O” -shaped rubber roll to absorb the energy of the journal whirling to increase the whirling start rotation