A model for the evaluation of wear and durability of a plain bearing with small out-of-roundness

Chernets, M. V.; Andreikiv, O. É.; Lebedeva, N. M.; Zhydyk, V. V.

doi:10.1007/s11003-009-9176-5

Cited by 17 publications

(50 citation statements)

References 2 publications

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“…This problem has been successfully solved by the cumulative wear model, 16,18 which is based on the interval-discrete interaction of the sliding bearing elements at some selected area Á 2 of tribocontact.…”

Section: Tribokinetic Cumulative Wear Modelmentioning

confidence: 99%

“…2 R 2 , ! 2 ¼ n 2 =30: When determining 0h using equation (17) and kh using equation (18), " h should be calculated as…”

Section: Tribokinetic Cumulative Wear Modelmentioning

confidence: 99%

“…maximum tribocontact pressures: 1st rotation : p 11 Phase † † 1 (p. P 0 1 -double-area symmetric and asymmetric contact) 1 2 ð Þ using equation (12), where N 1 2 , according to equation (13), and tribocontact 1h 2 ð Þ, according to equation (18) . maximum tribocontact pressures: first rotation : p 12 .…”

Section: Generalized Cumulative Wear Model (Mixed Tribocontact Interamentioning

confidence: 99%

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Generalized method for calculating the durability of sliding bearings with technological out-of-roundness of details

Chernets

2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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This article presents the generalized cumulative model of wear kinetics for the sliding bearing elements in the case of single area and single-and-double area contact for different phases of rotating a shaft with a small contour ovality and a bushing with a circular contour. As a result of the performed numerical analysis, the regularities of the change in the initial maximum contact pressure due to shaft rotation and shaft changes due to wear are described, as well as the durability of the bearing and the linear wear of the bushing and shaft depending on the size of ovality are discussed in the work. The contact pressures are considerably higher in the zones of double-area contact than in the zones of single-area contact. The shaft ovality increases the bearing durability and reduces the hob wear. The results are presented graphically by means of charts.

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Section: Tribokinetic Cumulative Wear Modelmentioning

confidence: 99%

“…2 R 2 , ! 2 ¼ n 2 =30: When determining 0h using equation (17) and kh using equation (18), " h should be calculated as…”

Section: Tribokinetic Cumulative Wear Modelmentioning

confidence: 99%

Section: Generalized Cumulative Wear Model (Mixed Tribocontact Interamentioning

confidence: 99%

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Generalized method for calculating the durability of sliding bearings with technological out-of-roundness of details

Chernets

2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Moreover, the linear wear is cumulated. By using this model, the solutions of this problem were obtained for the case of realization of the single-zone contact of the components in [7][8][9].However, the interval-discrete scheme of tribocontact interaction requires long time for calculations, in particular, for small intervals of discretization of the contour of the shaft, when the solution is most exact. As Δα 2 increases, the accuracy becomes lower, and the time decreases proportionally to the increase in Δα 2 .…”

mentioning

confidence: 99%

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Accuracy of Evaluation of the Service Life of a Plain Bearing According to the Generalized Cumulative Model of Wear

2014

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By using the generalized cumulative model of wear and a developed rapid method for the investigation of the kinetics of tribocontact interaction in a plain bearing with small ovality of the shaft, we evaluate the accuracy of evaluation of the service life. We study single-zone and single-double-single-zone contact interactions of the shaft with the bush. The obtained results are thoroughly analyzed and the influence of the parameters of the interval-block main scheme and modified computational scheme on the accuracy of evaluation of the service life of the bearing is estimated. We establish the regularities of decrease in the accuracy of the solution depending on the sizes of the blocks of interaction cycles with constant conditions and on the interval of discretization of the contour of the shaft. The schemes of calculations optimal from the engineering point of view and their parameters are indicated.Keywords: plain bearing, generalized cumulative model of wear, service life, rapid method for the investigation of the kinetics of wear, accuracy of the method, interval-discrete and interval-block tribocontact interaction.The methods for the numerical analysis of plain bearings [1-6] are based on the assumption that their contacting components have circular cross sections (Fig. 1). However, it is known that, in the process of manufacturing of shafts and bushes, their contours inevitably get certain small deviations from the circular shape of various types. The simplest of these deviations is ovality. In this connection, it is necessary to take into account the influence of technological noncircularities on the parameters of contact and tribocontact interactions.In the cumulative model of wear developed in [7], the kinetics of tribocontact interactions in plain bearings with noncircular shafts and bushes was investigated according to the interval-discrete scheme. This model is based on splitting the contour of the shaft with deviations from the circular shape into j intervals of discretization Δα 2 = 1°, 5°, 10°, … , 90°. In each of these intervals, the parameters of tribocontact interaction remain unchanged within a single revolution of the shaft and, in the course of subsequent revolutions, the characteristics of contact vary as a result of wear of the components of bearings. Moreover, the linear wear is cumulated. By using this model, the solutions of this problem were obtained for the case of realization of the single-zone contact of the components in [7][8][9].However, the interval-discrete scheme of tribocontact interaction requires long time for calculations, in particular, for small intervals of discretization of the contour of the shaft, when the solution is most exact. As Δα 2 increases, the accuracy becomes lower, and the time decreases proportionally to the increase in Δα 2 .

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Evaluation of the contact strength and durability of plain bearings with different types of shaft lobing

Chernets

2015

Proceedings of the Institution of Mechanical Engineers, Part J:

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The generalized cumulative model of wear is employed to solve the tribocontact problem for plain bearings where journals have small lobing (ovality, trilobing, tetralobing). The case of mixed-area contact interaction between the shaft and bush is examined. The study investigates the effect of lobing both on variations in the maximum contact pressures during a full revolution of the shaft and on bearing durability. Regularities concerning this effect are determined. It was found that lobing causes a significant increase in the contact pressures depending on the extent of shaft outof-roundedness and type of lobing. Specifically, ovality increases the bearing durability by 1.32 times; compared to the durability of a bearing with a circular section shaft, trilobing increases the bearing durability by 1.25 times, whereas tetralobing decreases the bearing durability even by 1.2 times.

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A model for the evaluation of wear and durability of a plain bearing with small out-of-roundness

Cited by 17 publications

References 2 publications

Generalized method for calculating the durability of sliding bearings with technological out-of-roundness of details

Generalized method for calculating the durability of sliding bearings with technological out-of-roundness of details

Accuracy of Evaluation of the Service Life of a Plain Bearing According to the Generalized Cumulative Model of Wear

Evaluation of the contact strength and durability of plain bearings with different types of shaft lobing

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