Experimental verification of new features of bearing operation under combined loading conditions

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Abstract

Bearing units of lifting machines, products of construction, road, aviation, space and other branches of technology are very important structural elements, since the failure of even one bearing can cause the failure of the entire product. The results of experimental verification of the theoretical model of bearing operation under combined loading conditions are presented. The behavior under load of bearing units in the most general case can be represented by a sequence of five design schemes, expressed in the form of five statically indeterminate beams. The purpose of the experiments was to test this model under real loading conditions. The experiments were based on the analysis of the geometric shape of the curved elastic line, which the shaft of the bearing assembly acquires under load. The experimental results confirmed the validity of the model and showed that the previously generally accepted model of a two-support beam is not implemented. The conclusion is confirmed that in responsible lifting machines, as well as in responsible products of construction, road, aviation, space and other branches of technology, it is impractical to calculate bearings according to the traditional method, since an erroneous value of bearing durability can be obtained, overestimated from 28.37 to 26.663.9 times.

About the authors

Valeriy V. Kirilovskiy

Bauman Moscow State Technical University (National Research University)

Author for correspondence.
Email: kvv@bmstu.ru
SPIN-code: 4512-5571

Associate Professor, Department of Bases of Machine Design, PhD (Technical Sciences)

5 2nd Baumanskaya St, bldg 1, Moscow, 105005, Russian Federation

Yuri V. Belousov

Bauman Moscow State Technical University (National Research University)

Email: kvv@bmstu.ru
SPIN-code: 7102-6966

Associate Professor, Department of Bases of Machine Design, PhD (Technical Sciences)

5 2nd Baumanskaya St, bldg 1, Moscow, 105005, Russian Federation

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