{"id":2746,"date":"2023-05-19T13:50:11","date_gmt":"2023-05-19T10:50:11","guid":{"rendered":"http:\/\/itm.dp.ua\/?page_id=2746"},"modified":"2025-07-24T13:43:25","modified_gmt":"2025-07-24T10:43:25","slug":"freight-car-truck-retrofit","status":"publish","type":"page","link":"http:\/\/itm.dp.ua\/?page_id=2746&lang=en","title":{"rendered":"Freight-car truck retrofit"},"content":{"rendered":"\n

Purpose<\/em><\/strong><\/p>\n\n\n\n

Extended service life of trucks and improved dynamic performance of freight cars.<\/p>\n\n\n\n

Essence of the technology<\/em><\/strong><\/p>\n\n\n\n

Replacing standard friction assemblies with new, more durable ones and introducing new devices into the construction to improve dynamic car performance.<\/p>\n\n\n\n

Advantages<\/em><\/strong><\/p>\n\n\n\n

Truck retrofit is possible both for cars in service and for new cars. On retrofit, the car cost increases by 3 to 4 percent only while the service life of the major-wear parts shows a several-fold increase (a ten-fold increase for some parts).<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Testing and implementation<\/em><\/strong><\/p>\n\n\n\n

Operational and dynamic tests of cars together with their inservice inspection have confirmed and in some cases surpassed the predicted efficiency of the proposed retrofit.<\/p>\n\n\n\n

A project of complex retrofit of freight-car trucks, C03.04, has been developed and introduced. The retrofit uses three elements of the A.Stucki Co. (USA) and the ITM-73 wear-resistant wheel profile (Ukraine). The retrofit is in progress at all the Ukrainian car-repair plants and ten Ukrainian car shops. A system of repair and maintenance of retrofitted cars has been set up. Patents have been issued for: the ITM-73 wear-resistant wheel profile, which halves wheel flange wear; resilient roller side bearings, which offer a higher critical car speed, and friction wedges, which extend the service life of the wedge damping system by a factor of more than ten.<\/p>\n\n\n\n

<\/p>\n\n\n\n

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Major characteristic<\/strong><\/td>Retrofit by Project C03.04 (Ukraine)<\/strong><\/td>Retrofit by Project \u041c1698 (Russia)<\/strong><\/td>UVZ truck(Russia)<\/strong><\/td><\/tr>
Life, km x 1000:
wheel flange (machining life),
wedge damping system,
center plate arrangement<\/td>

300-400
1000-1200
700<\/td>

100-150
160-210
160-210<\/td>

100-150
160
N\/A<\/td><\/tr>
Critical speed
of empty cars
with medium\u2013worn wheels, km\/h<\/td>		120<\/td>60-80<\/td>110-120<\/td><\/tr>
Repairability<\/td>No need
for power\u2013intensive
repair work<\/td>		Truck part reclamation
during shop repairs<\/td>		N\/A<\/td><\/tr>
Cost, USD<\/td>2000-2500<\/td>450-550<\/td>N\/A<\/td><\/tr>
Pay\u2013back period, years<\/td>1,8-2,3<\/td>no less than 5<\/td>N\/A<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Major publications<\/em><\/strong><\/p>\n\n\n\n

1. Ushkalov V.F. On possible improvement of the dynamic performance of a freight car and reduction of wheelrail wear (in Russian) \/ V.F. Ushkalov, T.F. Mokrii, I.A. Mashchenko, L.A. Galchenko \/\/ Tekhnicheskaya Mekhanika. 2000. No 1. Pp. 83-89.<\/p>\n\n\n\n

2. Ushkalov V.F. On evaluation of the efficiency of wheels with different tread profiles in railway cars (in Russian) \/ V.F. Ushkalov, T.F. Mokrii, I.A. Mashchenko, I.Yu. Malysheva \/\/ Tekhnicheskaya Mekhanika. 2002. No 2. Pp. 121-127.<\/p>\n\n\n\n

3.Ushkalov V.F. Freight-car running gear retrofit (in Russian) \/ V.F. Ushkalov, T.F. Mokrii, M.M. Zhechev, I.A. Serebrianyi, I.Yu. Malysheva \/\/ Zaliznychnyi Transport Ukrainy. 2003. No 5. Pp. 33-36.<\/p>\n\n\n\n

4. Hansen Gregg W.M. Complex retrofit of 18-100 trucks to reduce wheel wear and improve the ride performance of freight cars (in Russian) \/ W.M. Gregg Hansen, A.D. Lashko, V.F. Ushkalov, T.F. Mokrii, I.Yu. Malysheva, I.A. Mashchenko \/\/ Visnyk Dnipropetrovskogo Natsionalnogo Universytetu Zaliznychnogo Transportu im. Ak. V. Lazariana. 2004. Issue 5. Pp. 215-219.<\/p>\n\n\n\n

5. Ushkalov V.F. Complex retrofit of freight-car running gear (in Russian) \/ V.F. Ushkalov, T.F. Mokrii, I.Yu. Malysheva, I.A. Mashchenko, S.S. Pasichnik \/\/ Vagonnyi Park. 2007. No 2. Pp. 18 – 22.<\/p>\n\n\n\n

Patent protection<\/em><\/strong><\/p>\n\n\n\n

1. Ushkalov V.F., Mokrii T.F., Mashchenko I.A. Flange fillet (in Russian). Russian Federation Utility Certificate No 22100 10.03.2002.<\/p>\n\n\n\n

2. Ushkalov F.F., Mokrii T.F., Mashchenko I.A. Railway wheel tread profile (in Russian). Russian Federation Utility Certificate No 26208 20.11.2002.<\/p>\n\n\n\n

3. Ushkalov V.F. (UA), Gatnarek Bruce (US), Rhen Dennis (US). Resilient roller side bearing (in Russian). Russian Federation Utility Certificate No 29020 27.04.2003.<\/p>\n\n\n\n

4. Ushkalov V.F. (UA), Gatnarek Bruce (US), Right James (US). Friction wedge (in Russian). Russian Federation Utility Certificate No 29276 10.05.2003.<\/p>\n\n\n\n

5. Ushkalov V.F., Mokrii T.F., Mashchenko I.O. Flange fillet (in Ukrainian).Ukrainian Patent for Utility Model No 1181 15.03.2002. Bulletin No 3.<\/p>\n\n\n\n

6. Ushkalov F.F., Mokrii T.F., Mashchenko I.A. Railway wheel tread profile (in Ukrainian). Ukrainian Patent for Utility Model No 1182 15.03.2002. Bulletin No 3.<\/p>\n\n\n\n

7. Ushkalov V.F. (UA), Gatnarek Bruce (US), Right James (US). Friction wedge (in Ukrainian).Ukrainian Patent for Utility Model No 1803 15.05.2003. Bulletin No 5.<\/p>\n\n\n\n

8. Ushkalov V.F. (UA), Gatnarek Bruce (US), Rhen Dennis (US). Resilient roller side bearing for freight-car trucks (in Ukrainian). Ukrainian Patent for Utility Model No 1802 15.05.2003. Bulletin No 5.<\/p>\n\n\n\n

9. Ushkalov V.F. (UA), Gatnarek Bruce (US), Rhen Dennis (US). Resilient roller side bearing (in Ukrainian). Ukrainian Patent for Utility Model No 1804 15.05.2003. Bulletin No 5.9.<\/p>\n\n\n\n

Contact information:<\/strong><\/td><\/tr>
Institute of Technical Mechanics of the NASU and SSAU<\/strong><\/td><\/tr>
Ukraine 49005<\/strong>
Dnipro<\/strong>
15 Leshko-Popel St.<\/strong><\/td><\/tr>
Contact person:<\/strong><\/td>T. F. Mokriy<\/td><\/tr>
Phone:<\/strong><\/td>+38 (056) 372 06 40<\/td><\/tr>
E-mail:<\/strong><\/td>mokriyt@gmail.com<\/a>
office.itm@nas.gov.ua<\/a><\/td><\/tr>
Web:<\/strong><\/td>http:\/\/www.itm.dp.ua<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"

Purpose Extended service life of trucks and improved dynamic performance of freight cars. Essence of the technology Replacing standard friction assemblies with new, more durable ones and introducing new devices…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2746","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"http:\/\/itm.dp.ua\/index.php?rest_route=\/wp\/v2\/pages\/2746","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/itm.dp.ua\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/itm.dp.ua\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/itm.dp.ua\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/itm.dp.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2746"}],"version-history":[{"count":8,"href":"http:\/\/itm.dp.ua\/index.php?rest_route=\/wp\/v2\/pages\/2746\/revisions"}],"predecessor-version":[{"id":5980,"href":"http:\/\/itm.dp.ua\/index.php?rest_route=\/wp\/v2\/pages\/2746\/revisions\/5980"}],"wp:attachment":[{"href":"http:\/\/itm.dp.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2746"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}