Abstract
The development of modern production is impossible without creating a testing base for manufactured products. The important tests that determine reliability and service life are tests for resistance to mechanical influences. These tests are carried out for land-based, sea-based and air-based products, space technology and special-purpose equipment. The most difficult tests are for devices with large mass and dimensions. In these cases, the only effective testing equipment can be powerful hydraulic tracking drives capable of creating shock and vibration loads that simulate transportation and operating conditions. The basis of the SGP are electrohydraulic power amplifiers (EGUM), devices that combine an electromechanical drive (EMF) and a spool distributor (SP). The EMF is the most important element of the system. It operates under severe operating conditions with high current loads and frequencies. It is a closed device for the ingress of solids and moisture, having a small volume. For these reasons, the removal of heat losses from the internal volume is a difficult task. The purpose of the study is to propose and justify an effective cooling system for EMF. The following methods are used: the article proposes a two-circuit air cooling system. To analyze the proposed solution, the method of equivalent substitution schemes for an aerodynamic circuit and thermal analysis is applied. The following results were achieved: calculations have shown the effectiveness of a dual-circuit air cooling system. With a stepwise increase in the thermal load of 250 W, the heating of the armature winding did not exceed insulation heat resistance class F, and the temperature of the permanent magnets did not exceed the operating temperature for the neodymium-iron-boron material. The practical significance of the investigation includes: the use of a dual-circuit air cooling system will not lead to a significant change in the design of the EGUM. The increased dimensions for EGUM are not a significant factor, while the range of operating modes is expanded, the reliability and service life of the device increase.
Keywords
hydraulic tracking drive, electrohydraulic power amplifier, electromechanical drive, dual-circuit air cooling system, equivalent replacement circuit, aerodynamic drag, thermal drag
1. Ardashev D.V., Zhukov A.S. Technological features of manufacturing a high-precision spool pair. Vestnik Yuzhno-Uralskogo gosudarstvennogo universiteta. Seriya: Mashinostroenie [Bulletin of the South Ural State University. Series "Mechanical engineering industry"], 2024, vol. 24, no.3, pp. 38-52. (In Russian). doi: 10.14529/engin240304
2. Ardashev D.V., Zhukov A.S. Technological Features of Manufacturing a High Precision Spool Pair. Proceedings of the 10th International Conference on Industrial Engineering (ICIE 2024). Lecture Notes in Mechanical Engineering. Springer, Cham. 2024, pp. 555-568. doi: 10.1007/978-3-031-65870-9_51
3. Kuai J., Duan Y., Li X., Liu S., Ardashev D.V. Effect of tool wear and variable friction coefficient on cutting force. Optics and Precision Engineering. 2024, vol. 32, no. 14, pp. 2211-2224. doi: 10.37188/OPE.20243214.2211
4. Baturin A., Ardashev D.V., Abbasova H. Requirements Definition, Modeling, and Simulation of Con-trol Units of an Electrohydraulic Power Amplifier. Advances in Science and Technology. 2024, vol. 148, pp. 179-186. doi: 10.4028/p-c1JZF9
5. Gandzha S.A., Neustroev N., Sogrin A., Korobatov D., Ardashev D.V., Dadashov R. The Development and Study of an Electromechanical Converter for an Electro-Hydraulic Power Amplifier of a Servo-Hydraulic Drive. Advances in Science and Technology, 2024, vol. 148, pp.163-178. doi: 10.4028/p-6hcdrD
6. Lifanov V.A. Raschet elektricheskikh mashin maloi moshchnosti s vozbuzhdeniem ot postoyannykh magnitov [Calculation of low-power electric machines with excitation from permanent magnets]. Chelyabinsk, SUSU Publishing Center, 2010. 164p. (In Russian)
7. Kopylov I.P., Klokov B.K., Morozkin V.P., Tokarev B.F. Proektirovanie elektricheskikh mashin [Design of electric machines]. Moscow, Higher School Publ., 2005. 767 p. (In Russian)
8. Voldek A.I. Elektricheskie mashiny [Electric machines]. Leningrad, Energiya Publ., 1979. 832 p. (In Russian)
9. Bodrov V.V., Bagautdinov R.M., Bagautdinov A.R., Suvorov K.B., Ardashev D.V., Neustroev N.I., Sogrin A.I., Gandzha S.A., Korobatov D.V. Elektromekhanicheskiy preobrazovatel elektrogidravlicheskogo usilitelya [Electromechanical converter of an electrohydraulic amplifier]. Patent RF, no. 222690, 2023.
10. Wu S., Jiang Z., Zhahg R., Ju J., Chen C.-Y. Development of a Direct-Drive Servo Valve With High-Frequency Voice Coil Motor and Advanced Digital Controller. IEEE/ASME Transactions on Mechatronics. 2014, no. 19(3), pp. 932-942.doi:10.1109/TMECH.2013.2264218
11. Sibikin Yu.D. Otoplenie, ventilyatsiya i konditsionirovanie vozdikha [Heating,ventilationandair conditioning]. Moscow, Akademiya Publ., 2007. (In Russian)
12. Zelikov V.V. Spravochnik inzhenera po otopleniyu, ventilyatsii i koditsionirovaniyu [Handbook of an engineer on heating, ventilation and air conditioning]. Moscow, Infra-Engineering Publ., 2013. (In Russian)
13. Biryuk V.V., Blagin E.V., Lysenko Yu.D., Uglanov D.A. Aerodinamika i samoletostroenie [Aerodynamics and aircraft engineering]. Samara: Publishing House of Samara University, 2018. 180 p. (In Russian)
14. Types of electric motor cooling. Available at: https://el-dv.com/electrodvigateli-statiy/tipy-ohlazhdeniya-elektrodvigatelej (accessed 10 February 2025) (In Russian).
15. Cooling of industrial electric motors. Available at: https://www.ttaars.ru/news/oxlazhdenie-promyishlennyix-elektrodvigatelej (accessed 10 February 2025) (In Russian).
16. Kazakov V.G., Lukanin P.V., Smirnova O.S. Eksenergeticheskie metody otsenki effektivnosti teplotekhnicheskikh ustanovok. [Exergetic methods for evaluating the efficiency of thermal technology installations]. Saint Petersburg, Saint Petersburg State Technological University of Plant Polymers Publ., 2013. 63 p. (In Russain)
17. Thermal calculation using thermal substitution schemes. Available at: https://studfile.net/preview/16568105 (accessed 10 February 2025) (In Russian).
18. Annenkov A.N., Akimov S.S., Volkov V.D., Rodionov O.V. Detailed thermal substitution schemes for contactless motors powered by permanent magnets. Vestnik Voronezhskogo gosudarstvennogo tekhnicheskogo universiteta [Bulletin of Voronezh State Technical University], 2011, vol. 7, no. 12-3, pp. 19-22. (In Russian)
Gandzha D.S., Ardashev D.V. Two-Circuit Cooling System for Electromechanical Drive of Electro Hydraulic Power Amplifier. Elektrotekhnicheskie sistemy i kompleksy [Electrotechnical Systems and Complexes], 2025, no. 1(66), pp. 25-31. (In Russian). https://doi.org/10.18503/2311-8318-2025-1(66)-25-31