Lubricator casings for locomotive wheel rims

Kokhanovskii, V. A.; Maiba, I. A.; Glazunov, D. V.; Bolshikh, Ivan

doi:10.3103/s1068798x16050099

Cited by 10 publications

(2 citation statements)

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“…A similar car wheel tread profile is being introduced in a number of European coun- On the inner side of the rim, we found a 2U flange that protected the wheelset from the derailment. The flange height was h = 28 mm, and the thickness, measured at a distance of 18 mm from its top, was 33 mm [58,59]. The flange deflection angle (α) was 60 • .…”

Section: Discussion Of the Results Of Fatigue Stress Distribution Simulation For Worn Wheel Contact Elementsmentioning

confidence: 99%

Study of Wear and Redistribution Dynamic Forces of Wheel Pairs Restored by a Wear-Resistant Coating 15Cr17Ni12V3F

et al. 2021

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The relevance of this study lies in the need to research the wear process of the elements of dynamic systems and to establish the dependence of the geometric and structural characteristics of wheels restored by plasma surfacing with a coating of 15Cr17Ni12V3F on dynamic, cyclically varying loads. The study was aimed to establish the dependencies between the deviation of the wear area, the formation of contact and fatigue stresses, and the change in the phase structure of the wheel defect. It is important to justify the permissible limits of wear of the transverse profile in the contact zone of a wheel and ridge. The object of the study was the dynamic interaction of the “wheel–ridge–rail contact surface” system. To achieve the goal, the following methodology was adopted: kinematic analysis, strength calculation, the use of mathematical analysis in dynamic system modelling, virtual modelling in the SOLIDWORKS software environment of the GearTrax application, experiment planning, and model correction through the results of metallographic studies. The results of the study are presented as reasonable prediction criteria that consider contact cycles during the formation of fatigue stresses at the stage of defect origin. The process of the dynamic interaction of the contact worn profile of a wheel with a railway rail is explored. Polynomial equations are proposed to substantiate the optimal design and technological parameters of designing a railway carriage wheel. The permissible limits of wear of the transverse profile in the contact zone of the wheel and the ridge are justified while taking the coefficient of the reduction of contact stresses in the metal into account. The dependences of the change in static load on the utilization factor of the railway carriage load capacity are established. The dependences of changes in fatigue stresses on the design deviation of the contact area of wheel wear are established. It is confirmed that the stress concentration under cyclic loads is formed in the ferritic layers of the material structure before the appearance of wear.

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Section: Discussion Of the Results Of Fatigue Stress Distribution Simulation For Worn Wheel Contact Elementsmentioning

confidence: 99%

Study of Wear and Redistribution Dynamic Forces of Wheel Pairs Restored by a Wear-Resistant Coating 15Cr17Ni12V3F

et al. 2021

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“…Scheduled and unscheduled repairs restore their serviceability, and the locomotives continue their operational work. The alternating failures and restores of locomotives create some streams of failures and restores as a kind of streams of random events [11,12]. As a quantitative indicator of the locomotive failure flow, the "averaged failure flow parameter" -the mathematical expectation of the number of failures N of locomotives per run -is used [13].…”

Section: Statement Of the Essence Of The Solution To The Problemmentioning

confidence: 99%

Locomotive Reliability Assessment Method

Gubarev

2022

Materials Research Proceedings

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Abstract. The authors describe the analysis of the current state of the problem under consideration. A definition of "averaged failure flow parameter" is given. The periods of traction rolling stock life cycle are considered. The assumption of event distribution laws exponentiality is introduced, which makes it possible to obtain expressions of the main reliability indices in the analytical form. The work of depot service locomotives to ensure the required reliability and readiness of the rolling stock during their normal operation has been assessed. The introduction of the term "readiness" into the modern practice of traction rolling stock reliability estimation is considered. The initial data for calculating the indexes of locomotive uptime and readiness are presented. Calculated values of readiness and no-failure indices of electric locomotives in operation are obtained. The calculated values of internal and technical availability coefficients are compared with similar indicators established by technical specifications. Control procedures were performed to determine the compliance of each set of locomotives (EP1, 2ES4K) with the uptime requirements. As a result of comparing the calculated values of internal and technical availability factors (for electric locomotives EP1 and 2ES4K with analogous values set by specifications (EP1 and 2ES4K) it was determined that the surveyed locomotives comply with the established availability requirements. As a result of control procedures to determine the compliance of each set of EP1 and 2ES4K locomotives with the uptime requirements, it was determined that the set of 2ES4K electric locomotives for the run in question does not fully comply with the uptime requirement. And the set of EP1 electric locomotives meets the reliability requirements, but the error value is higher than 20%. To clarify both events, it is necessary to increase the mileage interval of the locomotives and repeat the procedure for determining compliance with the uptime requirements. The method of assessing the uptime and readiness of locomotives during their normal operation makes it possible to identify existing shortcomings in the operation of rolling stock and to form measures to improve the quality of rolling stock operation.

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Mathematical Model of Railway Vehicle Moving Along Track with Nonlinear Variable Characteristic of Friction Ratio in Zone of Wheel Frictional Contact with Rail

Maiba

Glazunov

2021

Lecture Notes in Mechanical Engineering

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Lubricator casings for locomotive wheel rims

Cited by 10 publications

References 0 publications

Study of Wear and Redistribution Dynamic Forces of Wheel Pairs Restored by a Wear-Resistant Coating 15Cr17Ni12V3F

Study of Wear and Redistribution Dynamic Forces of Wheel Pairs Restored by a Wear-Resistant Coating 15Cr17Ni12V3F

Locomotive Reliability Assessment Method

Mathematical Model of Railway Vehicle Moving Along Track with Nonlinear Variable Characteristic of Friction Ratio in Zone of Wheel Frictional Contact with Rail

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