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

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.

1. [User manual for PEB.401722.020RE. UDP-2001SM installation for vibration diagnostics of bearings of freight, refrigerator, and passenger car wheels]. Voronezh; 2017. (in Russ.)

2. Otoka A.G., Budnik D.V., Liakh A.M. Experience of operation of the UDP-2001SM installation for railway wheel pair bearing vibration diagnostics and the OMSD-02 mechanism diagnostics system. Dependability 2022;4:8-15. DOI: 10/21683/1729-2646-2022-22-4-8-15

3. [Certificate for SOP AK 32.01.001. Quality control sample (roller with a cut for the UDP-2001SM installation). Voronezh; 2017. (in Russ.)

4. [RD32 TsV 109-2011. Manual for vibration diagnostics of axle box bearings of car wheel pairs. Approved by Order of JSC RZD dated 04.03.2011 no. 457r]. (in Russ.)

5. [Technical requirements for vibration diagnostics systems for axle box bearings of freight car wheel pairs no. 741-2011. PKB TsV; 2010.] (in Russ.)

6. [Operation manual for PEB.441161.001 RE. A stand for rotating wheel sets of freight wagons]. Voronezh; 2006. (in Russ.)

7. [Standard output of scrap iron in the process of stripping of decommissioned freight wagons and wheel pair maintenance. Approved by the order of the Deputy Head of the Belarusian Railway dated 29.12.2022 no. 1057NZ]. (in Russ.)