Wear Resistance Improvement in the Friction Wedge - Friction Plate Pair of a Freight Car Bogie Wedge-Type Shock Absorber
Abstract
Low wear resistance in the friction pair friction wedge - friction plate proves to be the key reason for insufficient operational workability of the wedge-type shock absorber of a freight car bogie swing suspension. The authors come up with the problem solution consisting in application of new materials for the indicated friction pair, specifically grade ChMN-35M alloyed iron for friction wedge and grade 25Kh steel for friction plate. To assess wear resistance of the selected materials there was conducted JSC VNIIZhT based research and testing campaign comprising comparative testing of material samples on the friction and wear machine MI-1 (Amsler tests), full-scale tests of friction wedges and plates on the type TsDM 200 Pu testing rig and tests of friction wedges and plates in trial runs over the experimental loop track. Outcomes analysis of the rig tests and trial runs campaign with sample parts fabricated of the indicated materials al-lowed to prove their higher wear resistance as compared with mass production parts in terms of ensuring the required service life of the wedge-type shock absorber. Comparative outcomes analysis of the experiments conducted to assess wear resistance of the selected friction pairs demonstrates that with the specified service life indice performance of rig tests only is just enough to determine the amount of contacting surfaces wear of the examined materials and to arrive at a preliminary decision on the materials to be used for friction parts of the freight car bogie wedge-type shock absorber.
About the Authors
A. V. Sukhov
JSC Railway Research Institute (JSC VNIIZhT)
Russian Federation
Russian Federation
B. V. Borsch
JSC Railway Research Institute (JSC VNIIZhT)
Russian Federation
Russian Federation
A. V. Gabetz
Altai Steel Mill Ltd
Russian Federation
Russian Federation
References
1. Chelnokov I. I. et al. Gasiteli kolebaniy vagonov [Train cars vibration dampers]. Moscow, Transzheldorizdat Publ., 1963. 176 p.
2. Gabets A. V. Spetsial’nyy chugun dlya otlivki friktsionnogo klina telezhki zheleznodorozhnogo vagona [Special iron for casting friction wedge of railway car truck]. Polzunovskiy vestnik, 2013, no. 4/2, pp. 51 – 52.
3. Borshch B. V. et al. Povyshenie iznosostoykosti friktsionnykh detaley iz serogo chuguna [Increasing wear resistance of friction parts made of gray cast iron]. Stal’, 2014, no. 1, pp. 66 – 68.
4. Kragel’skiy I. V. Trenie i iznos [Friction and wear]. Moscow, Mashinostroenie Publ., 1968. 480 p.
5. Grib V. V., Lazarev G. E. Laboratornye ispytaniya materialov na trenie i iznos [Laboratory tests on the material friction and wear]. Moscow, Nauka Publ., 1965. 115 p.
6. Velikanov A. V. et al. Chugunnye friktsionnye klin’ya telezhki gruzovogo vagona [Cast iron friction wedges of freight car bogies]. Vestnik VNIIZhT [Vestnik of the Railway Research Institute], 1999, no. 1, pp. 25 – 31.
7. Velikanov A. B, Borshch B. V. Friktsionnye klin’ya iz vysokoprochnogo chuguna [Friction wedges of ductile cast iron]. Vestnik VNIIZhT [Vestnik of the Railway Research Institute], 2007, no. 2, pp. 18 – 22.
8. Velikanov A. B, Borshch B. V. Klin iz serogo chuguna dlya friktsionnogo gasitelya kolebaniy gruzovykh vagonov [Wedge of gray cast iron for the friction damper of freight cars]. Voprosy razvitiya zheleznodorozhnogo transporta v usloviyakh rynochnoy ekonomiki. Sb. nauch. tr. OAO “VNIIZhT” [Issues of railway transport development in a market economy. Coll. of sci. works of JSC “VNIIZhT” (Railway Research Institute)]. Moscow, Intext Publ., 2007, pp. 166 – 175.
9. Filippov G. A. Fundamental’nye issledovaniya prirody khrupkosti — osnova sozdaniya vysokoprochnykh i nadezhnykh konstruktsionnykh materialov [Fundamental studies on the nature of fragility — the basis for the creation of high-strength and reliable construction materials]. Stal”, 2004, no. 8, pp. 69 – 78.
Review
For citations:
Sukhov A.V., Borsch B.V., Gabetz A.V. Wear Resistance Improvement in the Friction Wedge - Friction Plate Pair of a Freight Car Bogie Wedge-Type Shock Absorber. RUSSIAN RAILWAY SCIENCE JOURNAL. 2015;(5):25-29. (In Russ.)
Views:
654
.jpg)
Email this article 