| Lien | https://discovery.ntroknowledge.com.au/discovery/search?query=any,contains,Preventive%20grinding%20on%20Estrada%20de%20Ferro%20Caraj%C3%A1s,%20Brazil&tab=Everything&search_scope=MyInst_and_CI&vid=61NTRO_INST:ATRI&offset=0 |
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| Auteur | Rechercher : Sroba, Peter; Rechercher : Sgavioli, Fernando; Rechercher : Joy, Richard; Rechercher : Santos, Jose Ribamar; Rechercher : Pina, Antonio C. A.; Rechercher : Caldwell, Robert1Identifiant ORCID : https://orcid.org/0009-0007-2643-1078 |
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| Affiliation | - Conseil national de recherches Canada. Transports de surface
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| Format | Texte, Article |
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| Conférence | 10th International Heavy Haul Association Conference - Capacity Building Through Heavy Haul Operations (IHHA 2013), February 4-6, 2013, New Delhi, India |
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| Sujet | rail grinding; rail life; detail fractures; rolling contact fatigue; rail wear; preventive grinding; preventive-gradual grinding; capacity building; increasing axle loads; safety; rail monitoring; gauge face lubrication; friction management; track maintenance; flashbutton welds; squats |
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| Résumé | Vale S.A.’s Estrada de Ferro Carajás (EFC) and Transportation Technology Center, Inc. (TTCI) began a program in 1996 to increase tonnage on EFC’s 890 kilometres of track. Significant rail and wheel fatigue problems were causing excessive maintenance and removal of fatigued components. By 2016 EFC will increase line capacity by installing double track, increasing axle loads to 37.5 tonne (t) and increasing annual tonnage to 460 million gross tonnes (mgt). The National Research Council Canada, Surface Transportation (NRC-ST) was commissioned in 2008 by TTCI and EFC to assist with the management of the rail to increase rail life. NRC-ST designed six new rail profile templates. Multiple tangent profiles were introduced to spread the distribution of rail contacts across the wheel tread to obtain more uniform tread wear which reduces the rate of tread hollowing and the development of false flanges. To better manage the rail and increase grinding productivity, EFC purchased a high production 96-stone rail grinder in 2008 to better implement the NRC-ST rail profile templates using a preventive gradual grinding strategy. A detailed grinding program was developed using a single pass at 15 km/h with specific patterns for each tangent and curve on EFC. Grinding intervals were established based on the rail position and the state of rolling contact fatigue (RCF). The EFC rail is now in excellent condition after 450 mgt of traffic. Newer rail on the line is now predicted to last significantly longer as a result of the preventive grinding program. Starting in 2012 curve rail life will further increase with the introduction of an effective lubrication and top-of-rail friction management strategy. |
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| Date de publication | 2013 |
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| Maison d’édition | International Heavy Haul Association |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | e979548f-9935-49ec-a8a0-1a5f3d8b0d70 |
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| Enregistrement créé | 2024-07-30 |
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| Enregistrement modifié | 2025-09-03 |
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