Analysis and Test on the Effect of Bearing Vibration on Oil Film Whirl

Analysis and Test on the Effect of Bearing Vibration on Oil Film Whirl

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In order to study the coupling effect of bearing vibration on oil whirl, the motion mechanism of bearing vibration is analyzed, and the dynamic equation representing the effect of bearing vibration on oil whirl is established.It is pointed out that bearing vibration will change the boundary conditions of lubricating oil film and click here hence disturb the lubricating flow field, which may aggravate oil film whirl and produce significant half-frequency vibration fluctuation.On the other hand, it may also change the thickness of the oil blackmores ache relief focus review film such that the oil film stiffness also changes, causing the fundamental frequency vibration fluctuation.Subsequently, a verification test was performed on the actual units on site.The results show that the vibration of small or light load bearings has remarkable effect on the oil whirl, which will cause severe fundamental and half-frequency vibration fluctuation, while the vibration of large or heavy load bearings does not affect the oil whirl very much, which will only trigger some fundamental frequency vibration fluctuation at certain level.