STUDYING THE POSSIBILITY OF FATIGUE DAMAGES FORMATION ON THE GEARWHEELS OF OPEN GEAR OF THE ELECTRIC DRIVE OF THE TAINTER GATES OF THE MOSCOW CANAL NAVIGATION LOCKS

Maneuvering of the main tainter gates of the upstream end of the Moscow Canal navigation locks is carried out by means of electromechanical drives. Many of them have been in operation for over 80 years. One of the main elements that limit the service life of drive mechanisms are gearwheels of open gears. The realization of their sudden failure can lead to a long interruption of shipping. The accumulated experience of operating and observing similar elements at other facilities has shown that the controlled parameters established in the regulatory documentation may not be enough to objectively assess their technical condition and determine the residual life. In particular, there are no requirements for checking these products for fatigue damage. To determine the possibility of such defects formation and the localization of areas where their occurrence is most likely, a comprehensive assessment of the stress-strain state is performed using the finite element method under design loading conditions, as a result of which global calculation models of the elements under study are obtained. It has been established that the calculated values of nominal stresses do not exceed the endurance limit of the material, with the exception of contact fatigue on the working surface of the gear teeth. At the same time, the possibility of fatigue cracks formation on the elements of the studied gearwheels due to the possible presence of technological stress concentrators in the form of casting defects is not excluded. The obtained cartograms of the stress state make it possible to establish the areas where the formation of fatigue cracks is most likely in the presence of technological defects on them. Taking into account the information received, recommendations are developed to prevent the implementation of sudden failures due to the uncontrolled development of the process of fatigue damage on the gearwheels of open gears at the stage of their operation.

navigation lock, tainter gate, electric drive, gearwheel, strain-stress state, service time, fatigue damage, failure

1. Терентьев В. Ф. Усталость металлов / В. Ф. Терентьев, С. А. Кораблева. - М.: Наука, 2015. - 480 с.

2. Yadav I. N. Fatigue damage model of concrete materials / I. N. Yadav, K. B. Thapa // Theoretical and Applied Fracture Mechanics. - 2020. - Vol. 108. - Pp. 102578. DOI: 10.1016/j.tafmec.2020.102578.

3. Nikitin I. S.Complex model for fatigue damage development / I. S. Nikitin, N. G. Burago, A. D. Nikitin, B. A. Stratula // AIP Conference Proceedings. - AIP Publishing LLC, 2020. - Vol. 2312. - No. 1. - Pp. 050015. DOI: 10.1063/5.0035517.

4. Liu H. Influence of load spectrum on contact fatigue damage of a case carburized wind turbine gear / H. Liu [et el] // Engineering Failure Analysis. - 2021. - Vol. 119. - Pp. 105005. DOI: 10.1016/j.eng-73failanal.2020.105005.

5. Старжинский В. Е. Виды повреждений зубчатых колес: типология и рекомендации по предупреждению повреждений / В. Е. Старжинский [и др.] // Трение и износ. - 2008. - Т. 29. - № 5. - С. 465-482.

6. Шеховцева Т. В. Особенности повреждения рабочих поверхностей зубчатых колес ГТД / Т. В. Шеховцева, Е. В. Шеховцева // Известия Тульского государственного университета. Технические науки. - 2019. - № 6. - С. 406-416.

7. Changbin D. Meshing Error of Elliptic Cylinder Gear Based on Tooth Contact Analysis / D. Changbin, L. Yongping, W. Yongqiao // International Journal of Engineering. - 2020. - Vol. 33. - Is. 7. - Pp. 1364-1374. DOI: 10.5829/IJE.2020.33.07A.24.

8. Adnan M. A. Stress Analysis Validation for Gear Design. Master’s Degree Thesis / M. A. Adnan, A. Shehata. - Karlskrona, Sweden: Blekinge Institute of Technology, 2018. - 66 p.

9. Ooi J. B. Modal and stress analysis of gear train design in portal axle using finite element modeling and simulation /j. B. Ooi, X. Wang, Ch. Tan, J. Ho and Y. P. Lim // Journal of Mechanical Science and Technology. - 2012 - Vol. 26. - Is. 2. - Pp. 575-589. DOI: 10.1007/s12206-011-1040-5.

10. Кузьмицкий М. Л. Определение уровня напряжений на колесах открытых зубчатых передач / М. Л. Кузьмицкий, Н. М. Ксенофонтов, И. Н. Базавлук // Журнал Университета водных коммуникаций. - 2013. - № 3. - С. 55-63.