RESEARCH OF THE POSSIBILITY OF APPLICATION OF VACCUM- HIGH-FREQUENCY TECHNOLOGY FOR DRYING WOODEN SUPPORTS

Ilhomjon Qodirov

Authors

 

Kachanov A.N. – doctor of Technical Sciences, Professor, Head of the Department of Electrical Equipment and Energy Saving, Oryol State Technical University, Oryol, Russia, kan@ostu.ru

Korenkov D.A. – Candidate of Technical Sciences, Associate Professor, Department ofElectrical Equipment and Energy Saving, Oryol State Technical University, Oryol, Russia, dimas.corenkov@yandex.ru

Maksimov V.V. – Candidate of Technical Sciences, Associate Professor, Head of the Department of Power Systems and Networks, Kazan State Power Engineering University,Kazan, Republic of Tatarstan, Russia, viktor.maksimmov.1968@mail.ru

Vorkunov O.V. – Candidate of Technical Sciences, Associate Professor, Department of Power Systems and Networks, Kazan State Power Engineering University, Kazan, Republic of Tatarstan, Russia, vorcunov_oleg@mail.ru

 

Annotation

 

 Drying of billets of supports used in power transmission lines up to 35 kV, currently performed by atmospheric or convective methods, is a responsible stage of their production, requiring a lot of time and energy. At the same time, there are promising technologies of drying, which can reduce the duration and improve the quality of the process at comparable specific energy costs. Drying in the field of high-frequency currents under vacuum may be referred to such technologies, wide implementation of which is complicated by a number of unsolved scientific and technical problems: optimization of the process of vacuum high-frequency drying and ensuring the uniformity of the electromagnetic field in workpieces of large length. The aim of the present work is to consider the mentioned limiting factors as well as to outline the directions of ongoing theoretical and experimental research in the field of vacuum high-frequency drying of long-length wood materials. Consideration of accumulated world practical experience in construction and operation of high-frequency electro-technological complexes using modern results of theoretical research in the future will allow to adapt vacuum-high-frequency technology for drying of capillary-porous materials of cylindrical shape of big length, including billets of wooden supports. If this condition is met, it will be possible to increase their service life, which will have a positive effect on the reliability of electricity distribution networks of consumers at low and high voltage levels up to 35 kV.

 

Keywords

 

 drying of wooden supports; drying in an electromagnetic field; drying in vacuum; electrotechnical drying installations; increasing the reliability of overhead transmission lines; energy and resource saving technologies

 

References

 

  1. Gatiyanov I.Z., Sibitov L.S. Methods and installations for monitoring tubular rod supports used in power engineering under the influence of static and dynamic loads on them. Proceedings of higher educational institutions. ENERGY PROBLEMS 2018; 20 (5-6); P. 93-101.
  2. Kachanov A.N., Korenkov D.A. Description of the electromagnetic field in a flat capacitor with high-frequency heating of long dielectrics // Bulletin of KrasGAU. 2016. No. 10 (121). P. 137-143.
  3. Kachanov A.N., Korenkov D.A., Revkov A.A., Maksimov V.V., Vorkunov O.V. Modeling the processes of high-frequency drying of wooden supports in a vacuum chamber // Izvestiya vysshikh uchebnykh zavod. ENERGY PROBLEMS. 2020.Vol. 22. No. 6. P. 130-142.
  4. Komarov V.V. Formulations of mathematical models of processes of interaction of electromagnetic waves with dissipative media in microwave heating systems // Physics of wave processes and radio engineering systems. 2010. Vol.13. No. 4. P. 57-63.
  5. Pat. No. 783541, IPC F26B3 / 34. Method of high-frequency drying of long-dimensional material / Grach I.M., Urseitov O.U., Doroshenko N.N., Filin A.Y., applicant and patentee of the Fzuzen Polytechnic Institute. – No. 2663936; declared 09/06/78; publ. 30.11.80.
  6. Savina N.V., Varygina A.O. Development of overhead transmission line supports and their adaptation to modern conditions // Proceedings of the conference Energy: management, quality and efficiency of resource use, Blagoveshchensk, March 11-12, 2019, pp. 347-352.
  7. Safin R.R., Khasanshin R.R., Safin R.G. Mathematical model of the process of convective drying of lumber in a rarefied environment // Lesnoi Zhurnal. 2006. No. 4. P. 64-71.

 

Publication date

2023-10-27