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Improvement of roller assemblies designs of pellet and roasting carriages

Authors: Anishchenko, O. S.; Takhtamysh, I. V.; Tarasiuk, L. I.;

Improvement of roller assemblies designs of pellet and roasting carriages

Abstract

The article analyzes the known designs of roller carriages used to manufacture sinter and pellets on conveyor lines. The authors analyze the design features of running and load rollers, the use of roller and ball bearings to connect rollers to the axles, various types of antifriction fillers of bearings, bearing lubrication system; blind, stuffing box and graphenite seals. The article points out the advantages and disadvantages of roller designs, the lack of standard technical solutions for the design of roller assemblies, as well as reliable methods for calculating their parts for strength and durability. To increase the service life of the rollers, after successful industrial tests, the authors propose innovative technical solutions: seals in the form of stuffing box packing made of expanded graphite fibers reinforced with steel thread; bearing antifriction filler made of PTFE, carbon fiber and graphite. The article shows that, due to axial loads during the operation of the carriages, it is impractical to use ball bearings in rollers; they should be replaced with roller bearings. The authors propose an approximate method for calculating the durability of bearings, which, unlike the existing standard methods, additionally takes into account the elastic deformation of the bogie material during thermal expansion and the size of the gaps in the assemblies of the carriages. In their calculations the authors use the experimental results on the size of the gaps in the assemblies of the carriages, the curvature of the body of the heated carriages on the conveyor line and their movement on three rollers instead of four; they take into account the change in the coefficient of linear expansion of the carriages material depending on the increase in the heating temperature of the body. The calculation results can serve as the lower limit for estimating the service life of ball bearings with antifriction filler

Рассмотрены известные конструкции роликов тележек для изготовления агломерата и окатышей. Определены преимущества и недостатки конструкций роликов. Предложены инновационные технические решения по увеличению срока эксплуатации роликов: уплотнение в виде сальниковых набивок из волокон вспученного графита, армированных стальной нитью; антифрикционный наполнитель для подшипников, созданный из политетрафторэтилена, углеродного волокна и графита. Показано, что из-за осевых нагрузок при эксплуатации тележек нецелесообразно использовать шарикоподшипники в роликах, их следует заменять на роликоподшипники. Предложен приближенный метод расчета долговечности подшипников, учитывающий упругую деформацию материала тележек при тепловом расширении и величины зазоров в узлах тележек

Розглянуті відомі конструкції роликів візків для виготовлення агломерату та котунів. Визначені переваги і недоліки конструкцій роликів. Запропоновані інноваційні технічні рішення щодо збільшення терміну експлуатації роликів: ущільнення у вигляді сальникових набивок з волокон спученого графіту, армованих сталевою ниттю; антифрикційний наповнювач для підшипників, створений з політетрафторетилену, вуглецевого волокна і графіту. Показано, що з-за осьових навантажень при експлуатації візків недоцільно використовувати кулькопідшипники в роликах, їх слід замінювати на роликопідшипники. Запропонований наближений метод розрахунку довговічності підшипників, який враховує пружну деформацію матеріалу візків при тепловому розширенні і величини зазорів у вузлах візків

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Keywords

trolley; roller; bearing; seals; clearance; thermal expansion; deflection, тележка; ролик; подшипник; уплотнения; зазор; тепловое расширение; прогиб, візок; ролик; підшипник; ущільнення; зазор; теплове розширення; прогин

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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