Perspective Constructions of Bridge Crossings on Transport Lines

Loktev, Alexey; Korolev, Vadim; Shishkina, Irina; Illarionova, Liliya; Loktev, Daniil; Гридасова, Е. А.

doi:10.1007/978-3-030-37919-3_20

Cited by 19 publications

(3 citation statements)

References 10 publications

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“…This indicates that the development of cracks is a consequence of the repeated loads applied, that is, it has a fatigue-like character. Another important indicator is the conditional probabilities of the appearance of at least one crack at any point in the cross section at a given depth [17,18,19,20]. To determine them, we consider the cross section of the core of the crosspiece and a metal layer of unit thickness located at the i-th depth from the surface of the core.…”

Section: Research Technique and Resultsmentioning

confidence: 99%

Hardening features for high manganese steel cores of crosspieces along the way

Shishkina

2020

E3S Web Conf.

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Herein are established main regularities of steel hardening and defect formation for the working conditions of cross-pieces along the way in order to be able to further reduce the number of samples without losing informativity about the metal functioning of cross-piece. The change in the hardness of the metal along the depth of the cross section at the stage of steady wear occurs with the wear rate of the cross-piece. From the surface of the cross into the depths of the cross section, the hardness of the metal decreases. The rule of change can be considered linear. The generalized results of studies of susceptibility of cross-pieces metal for defects showed that the processes of contact defect occurrence and their expansion on the cross-pieces are fatigue-like.

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Section: Research Technique and Resultsmentioning

confidence: 99%

Hardening features for high manganese steel cores of crosspieces along the way

Shishkina

2020

E3S Web Conf.

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“…The combination of these extreme values of pressure and velocity, together with the low antifriction steel properties, from which the rollers and races are produced, creates a very hard operating mode and high axle loads to be borne by the axle box. As a result, the wear of the roller ends and the race edges occurs intensively, especially in the initial operating period of new bearings [13,14].…”

Section: Discussionmentioning

confidence: 99%

Kinematic analysis of the axle box unit operation

Mashtakov

Khakimzyanov

Mickiewicz

2022

J. Phys.: Conf. Ser.

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The axle load acts on the box unit and has shock-pulse nature when the car is moving, that can lead to a mutual change in the surface positions of the roller ends with the edges of the bearing races. The ways are proposed to optimize the internal geometry of the radial and end contact elements of the roller bearing of the axle box unit. It is proposed to eliminate the occurrence of possible conditions that lead to the movement of bearing rollers into the thrust and locking of bearing rollers by increasing the minimum limit in the axle clearance of the axle box.

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“…Taking into account the fact that the radius of the mating circle is significantly less than the radius of the generatrix, the tolerance should be accepted: R2 = 300 ± 20 mm. The ordinates of the circles described by the nominal and limit radii are presented in table 2 [7].…”

Section: Methodsmentioning

confidence: 99%

Optimization of the radial bearing geometry by the dimensional analysis

Khakimzyanov

Mashtakov

Mickiewicz

2022

J. Phys.: Conf. Ser.

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In order to improve the working capacity and life of bearing units, the dimensional analysis of the inner geometry of a cylindrical radial bearing was carried out. The assembly component, composed by the outer diameter dimensions of the raceway of the inner race, the inner diameter of the outer race and the two diameters of the rollers, was considered as a dimension chain. It is recommended, in order to reduce wear and friction losses, to produce the diametrical dimensions of the roller according to the fifth accuracy degree. It is established that the cause of the axial clearance between the roller and the double-flanged race is the distance between the contact points on the right and left flanges with the horizontal position of the roller, as well as the diagonal distance. Tolerances for ring dimensions, for such a combination, are recommended to accept with respect to accuracy degree 6.

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Perspective Constructions of Bridge Crossings on Transport Lines

Cited by 19 publications

References 10 publications

Hardening features for high manganese steel cores of crosspieces along the way

Hardening features for high manganese steel cores of crosspieces along the way

Kinematic analysis of the axle box unit operation

Optimization of the radial bearing geometry by the dimensional analysis

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