ANALYSIS OF YHE MAIN OPERATING CONDITIONS AND DYNAMIC LOADING OF CRITICAL PARTS OF ТHE TARNSMISSION OF SKIDDERS

UDC 621.785.533

  • Simanovich Vasily Antonovich − PhD (Engineering), Associate Professor, Assistant Professor, the Department of Forest Machines, Roads and Technologies of Timber Industry. Belarusian State Technological University (220006, Minsk, Sverdlova str, 13a, Republic of Belarus). E-mail: Simanovish@belstu.by

  • Pishchov Mikhail Nikolayevish − PhD (Engineering), Assistant Professor, the Department of Material Science and Engineering of Technical Systems. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: Pishchou@belstu.by

  • Belsky Sergey Yevgrafovich − PhD (Engineering), Professor, the Department of Material Science and Engineering of Technical Systems. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: dmiptu@belstu.by

  • Tsaruk Fedor Fedorovich − PhD (Engineering), Assistant Professor, the Department of Material Science and Engineering of Technical Systems. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: Tsaruk@belstu.by

  • Skvortsov Dmitry Nikolayevich − student. Belarusian State Technological University (220006, Minsk, Sverdlova str., 13a, Republic of Belarus). E-mail: Skvorsh@mail.ru

DOI: https://doi.org/10.52065/2519-402X-2021-246-27-212–217

Key words: operation, transmission parts, forestry machines, wear resistance, gear wheels, surface hardening, surface roughness, microhardness.

For citation: Simanovich V. A., Pishchov M. N., Belsky S. E., Tsaruk F. F., Skvortsov D. N. Analysis of the main operating conditions and dynamic loading of critical parts of the transmission of skidders. Proceedings of BSTU, issue 1, Forestry, Nature Management. Processing of Renewable Resources, 2021, no. 2 (246), pp. 212–217 (In Russian).DOI: https://doi.org/10.52065/2519-402X-2021-246-27-212–217.

Abstract

The article analyzes the operating conditions of forest mobile machines. It was found that under medium loading conditions of a mobile skidder, the torque on the parts of the front drive axle does not exceed 1000 Nm. In case of overloading of the rear axle of the skidder, when a pack of trees is suspended in the power circuit of the equipment, the maximum moments on the rear axle shafts reach values 2–2.5 times higher than the moment when starting the tractor. This leads to the formation of residual plastic deformations on the contact surface of the gear pairs, which significantly reduces their total resource. On the basis of the studies carried out, transmission parts that have failed as a result of intense wear were identified, and the mechanism of their destruction was also established. A technology for their surface hardening with powder mixtures containing boron, aluminum and silicon (boronation and borosiliconization) is proposed, which significantly reduces the wear of these parts, thereby increasing the operating time of heavily loaded transmission parts of forest mobile machines.

It was found that when strengthening heavy-loaded and high-wearing parts of transmissions of forest mobile machines by complex boriding, the permissible contact stresses of the surface layer increase, which prevent surface wear, as well as the formation of plastic deformations to a depth of 200–250 microns, which leads to an increase in the service life of these parts.

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References

  1. Anikin N. I. Snizheniye dinamicheskoy nagruzki i uvelicheniye dolgovechnosti transmissiy lesnykh kolesnykh traktorov na osnove analiza dinamicheskikh protsessov v kharakternykh usloviyakh ekspluatatsii. Avtoref. dis. kand. tekhn. nauk [Decrease in dynamic loading and increase in durability of transmissions of forestry wheeled tractors based on the analysis of dynamic processes in characteristic operating conditions. Abstract of thesis cand. of techn. sci.]. Moscow, 1988. 20 p.
  2. Ostroverkhov N. L., Rusetskiy I. K., Boyko L. I. Dynamic loading of transmissions of wheeled vehicles. Nauka i tekhnika [Science and Technology], 1977, pp. 78–80 (In Russian).
  3. Simanovich V. A., Isachenkov V. S. Development of the design model “wheeled tractor-trailer module-pack of trees”. Trudy BGTU [Proceedings of BSTU], series II, Forest and Woodworking Industry, 2005, issue XIII, pp. 138–142 (In Russian).
  4. Zhorin A. V. Obosnovaniye parametrov trelevochnoy mashiny na baze sel'skokhozyaystvennogo traktora kl. 1,4. Avtoref. dis. kand. tekhn. nauk [Justification of the parameters of a skidder based on an agricultural tractor class. 1.4. Abstract of thesis cand. of techn. sci.]. Minsk, 1997. 18 p.
  5. Simanovich V. A., Pishchov M. N., Smeyan A. I. Operational evaluation of the work of wheeled forest modular machines. Trudy BGTU [Proceedings of BSTU], series II, Forest and Woodworking Industry, 2008, issue XVI, pp. 92–95 (In Russian).
  6. Pishchov M. N., Simanovich V. A., Belsky S. Ye. Study of operating conditions and dynamic loading of transmission parts of skidders. Trudy BGTU [Proceedings of BSTU], series II, Forest and Woodworking Industry, 2009, issue. XVII, pp. 113–115 (In Russian).
  7. Voroshnin, L. G. Borirovaniye promyshlennykh staley i chugunov [Boroning of industrial steels and cast irons]. Мinsk, Belarus’ Publ., 1981. 205 p.
  8. Voroshnin L. G., Lyakhovich L. S., Funshteyn Ya. N. Boronirovanie powdered mixtures. MiTOM [MiTOM], 1966, no. 12, pp. 67–69 (In Russian).
  9. Lyakhovich L. S., Voroshnin L. G., Panich G. G. Mnogokompanentnyye diffuzionnyye pokrytiya [Multicomponent diffusion coatings]. Мinsk, Nauka i tekhnika Publ., 1974. 289 p.
  10. Sitkevich M. V., Pishchov M. N., Belsky S. Ye. The effect of complex boride hardening on the structure and properties of the surface layers of steels for the manufacture of gear parts of skidding forest machines. Lit’ye i metallurgiya [Casting and metallurgy], 2008, pp. 140–146 (In Russian).
  11. Sitkevich M. V., Pishchov M. N., Belsky S. Ye. The structure and properties of the surface layers of gears hardened by complex boronation. Tekhnologii remonta, vosstanovleniya i uprochneniya detaley mashin, mekhanizmov, oborudovaniya, instrumenta i tekhnologicheskoy osnastki: materialy 10-y Mezhdunar. nauch.-prakt. konf. [Technologies for repair, restoration and hardening of machine parts, mechanisms, equipment, tools and technological equipment: materials of the 10th International scientific and practical conference]. St. Petersburg, 2008, part 2, pp. 346–353 (In Russian).
  12. Belsky S. Ye., Surus A. I., Pishchov M. N. Determination of the optimal parameters of the process of boring parts of forest machines. Trudy BGTU [Proceedings of BSTU], seies. II, Forest and Woodworking Industry, 2007, issue. XV, pp. 267–270 (In Russian).
  13. Makarevich S. S., Pishchov M. N., Belsky S. Ye. The model of the stress state of the teeth of the parts of the transmissions of skidders. Trudy BGTU [Proceedings of BSTU], series II, Forest and Woodworking Industry, 2009, issue XVII, pp. 327–330 (In Russian).
23.03.2021