The effect of rotation rate and mass of wheel pairs on the result of vibration diagnostics of axle boxes using a UDP-2021 stand

Abstract

Aim. The paper aims to compare the results of vibration diagnostics at different wheel pair (WP) rotation speeds based on the peak signal values and noise from the front bearing of the WP axle box equipped with a SOP AK 32.01 cylindrical roller with a standard defect. Methods. The peak vibration signal values were analysed using WP with different wheel tread thicknesses, i.e., 25, 45, and 65 mm. The bearing of one of the axle boxes (front) was equipped which a defective SOP AK 32.01 roller. Results. In the course of the experiment, it was found that as the thickness of the wheel tread grows the probability of over-rejection increases, which is practically confirmed by the fitness of the parts and components of the axle box upon dismantling and careful inspection. Conclusion. The “Reject” conclusion issued by the UDP-2001SM vibration stand should directly depend on the WP rotation speed. Additionally, its rotation rate should be selected depending on the thickness of the wheel tread.