Russian Federation
Russian Federation
Russian Federation
UDK 629.4.018 Испытания - методика и оборудование
Purpose: To conduct comprehensive experimental studies on the fatigue strength of side bearing springs for freight bogies, evaluating the effectiveness of thermal and shot peening treatments during their manufacturing process. Methods: The method of stand endurance (fatigue) testing of constant contact side bearing springs has been applied, allowing for obtaining endurance characteristics of actual components. Metallographic studies of spring steel have been conducted to investigate the influence of strengthening operations during spring manufacturing on their fatigue strength, with the assessment of mechanical characteristics of surface layers in various zones of the helical spatial beam. Results: Experimental force characteristics of spring sets for side bearings of an innovative freight bogie with a load of 25 tons (245 kN) on the axle have been obtained. Fatigue curves of the springs have been presented in a probabilistic aspect, enabling the determination of load factor for fatigue strength of the springs considering operational loading, as well as justifying the compliance of the spring sets with the regulatory requirements. Practical significance: Based on the research results, the considered constructive-technological variant of the constant contact side bearing spring for the freight bogie has been put into serial production. The test results allow us to reasonably determine the warranty mileage of the responsible assembly of the bogie and to conduct further work on the design modernization with the aim of increasing operational life.
Fatigue strength, springs, side bearing of a freight bogie, metallographic studies of spring metal
1. GOST 9246-2013. Telezhki dvuhosnye gruzovyh vagonov magistrali zheleznyh dorog kolei 1520 mm. Tehnicheskie usloviya.
2. GOST 34387-2018. Skol'zuny telezhek gruzovyh vagonov. Obschie tehnicheskie usloviya.
3. GOST 1452-2011. Pruzhiny cilindricheskie vintovye telezhek i udarno-tyagovyh priborov podvizhnogo sostava zheleznyh dorog. Tehnicheskie usloviya.
4. TU VBST. 667112.002. Telezhka dvuhosnaya 18-9891, tip 3 GOST 9246-2013. Tehnicheskie usloviya.
5. GOST 33211-2014. Vagony gruzovye. Trebovaniya k prochnosti i dinamicheskim kachestvam.
6. GOST 32208-2013. Pruzhiny ressornogo podveshivaniya zheleznodorozhnogo podvizhnogo sostava. Metod ispytaniy na ciklicheskuyu dolgovechnost'.
7. GOST 33788-2016. Vagony gruzovye i passazhirskie. Metody ispytaniy na prochnost' i dinamicheskie kachestva.
8. Normy dlya rascheta i proektirovaniya vagonov zheleznyh dorog MPS kolei 1520 mm (nesamohodnyh). - M.: GosNIIV - VNIIZhT, 1996. - 317 s. (s izmeneniyami i dopolneniyami).
9. ST SSFZhT CT-CV-CL 084-2000. Standart sistemy sertifikacii na Federal'nom zheleznodorozhnom transporte. Podvizhnoy sostav zheleznyh dorog. Pruzhiny cilindricheskie vintovye telezhek. Tipovaya metodika ispytaniy. Utverzhden i vveden v deystvie ukazaniem MPS Rossii ot 18.06.2001 № M-1107u.
