Determining the Stresses in Beams Due to Short-Term Effect on Their Supports

Kalinin, E.; Olexander, Saychuk; Volodymyr, Romanchenko; Koliesnik, Ivan; Kozhushko, Andrii

doi:10.1007/978-3-030-69221-6_47

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…At the same time, the study in which the effect of non-stationary random processes on the design of mechanical transmissions was analyzed [17]. Thanks to the use of the method of successive approximations, it was established that although the original equation is not a wave one, its solutions are of quasi-wave character in the sense that each subsequent approximation substantially changes the solution only from a certain time moment, all the more, the higher the number of the approximation being made will be.…”

Section: Literature Reviewmentioning

confidence: 99%

Development of a Machining Center Drive With Increased Efficiency of Gearing

2023

IJOMAM

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The design of the main movement drive for a multioperational machine such as a machining center with a modified design of a gear gearbox is considered. A 3D modelling of the machining center drive mechanism with a portal layout was performed in the integrated computeraided design system KOMPAS-3D. Functional extended range of the C3D Modeler geometric kernel when constructing complex geometry of machine housing parts is proposed to use. The procedure for constructing gear rims with high accuracy and geometrically correct tooth surfaces in the CAD environment was applied. At the stage of forming the shape of the tooth of a multivariate choice of the tooth axial shape, it is possible to implement. A new idea to increase the efficiency of the cylindrical gear transmission of the machine speed box based on the modified tooth profile of the gears with inclined-arched teeth is put forward. An analytical apparatus for calculating the design and choosing the radius of the gear-shaping cutting head with known basic transmission parameters have been formed. A comparative analysis for the calculated values of the axial overlap coefficient in an involute helical spur gear and in a spur gear with inclined-arched teeth is carried out with the same engagement parameters, other conditions being equal. Numerical calculations for the modified version of the engagement with inclined-arched teeth compared with the involute helical gear in terms of load capacity have been shown.

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Section: Literature Reviewmentioning

confidence: 99%

Development of a Machining Center Drive With Increased Efficiency of Gearing

2023

IJOMAM

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“…In [17], a dynamic model of an angular contact bearing is proposed, which considers the influence of the lubricant temperature on the slip of the balls and the impact force of the cage. In [18], a method for determining the internal forces arising in a beam during its subsequent movement is proposed, with no features (such as: supports, concentrated inclusions, etc.) which are distant from the bearing undergoing shaking by a greater distance and cannot affect the maximum value of internal forces in its proximity.…”

Section: Introductionmentioning

confidence: 99%

A Systematic Approach for Energy-Efficient Design of Rolling Bearing Cages

et al. 2023

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Several aspects must be considered in the design of rolling bearing cages. One of the most important considerations relates to studying and developing a stationary approach for solving problems of heat and mass transfer during convection. In this context, this paper proposes, among other achievements, the development and validation of a model of heat generation that is used, as the basis for an energy-efficient cage design in the context of the roller bearings of axle boxes for rail transport. The forces of interaction of the cage with the bearing parts are determined. The energy-efficient design of the cage is performed with modified friction surfaces in the form of convex contours of the pockets and micro-hollows on the surfaces of the pockets and support rings. On the basis of a flat model, of the interaction between the cage and the bearing parts, the pressure forces on the driving and driven rolling elements in the zone of radial loading are determined. The frictional moment of the bearing has been determined based on the integral design of the cage without taking into account lubrication during the interaction of the cage with the jumpers and with the sides of the basing ring. The calculation of the temperature gradient with standard and improved designs of bearing cages has been performed while taking air blowing into account; results showed a decrease in the average level and growth rate of the bearings’ temperature gradient with an energy-efficient cage design. Based on the obtained results, and on the developed heat generation model, a systematic approach for energy-efficient design of rolling bearing cages is proposed. The proposed approach, as well as the respective developed models, were validated by obtaining and analyzing the experimental results.

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