Abstract
This article presents a mathematical model of thermal processes in a flow hydraulic drive under extreme operating conditions. Transient processes for liquids of the A, AMG-10 brand in the range of ambient temperature change from −40 ℃ to +20 ℃ are considered. For liquid DP-11 from +20 ℃ to +40 ℃. In order to determine the adequacy of the proposed model, we calculated the average deviation of the theoretical results obtained from the experimental ones. It was found that for A grade A liquid, the average deviation does not exceed 3.5%, for AMG-10 liquid −3.2%, for DP-11 liquid −3,84%. The results showed that due to the circulation of the working fluid in the flow system allows, at low ambient temperatures (at −30 ℃), to raise the temperature in the hydraulic drive to medium for 15 min and maintain this temperature regime, at ambient temperatures of 40 ℃, after 40 min of operation of the hydraulic system, the temperature of the working fluid rises to 80 ℃, in the next 110 min the temperature rises to 96 ℃, which is a severe temperature regime for the fluid in question. The article shows that by changing the external heat exchange area of the hydraulic drive, in particular the shape of the hydraulic tank, it is possible to reduce the temperature rise of the working fluid by 15 ℃.
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Shermukhamedov, A., Astanov, B., Tojiboev, S. (2023). Modeling of Thermal Processes in Flow-Through Hydraulic Drives. In: Zokirjon ugli, K.S., Muratov, A., Ignateva, S. (eds) Fundamental and Applied Scientific Research in the Development of Agriculture in the Far East (AFE-2022). AFE 2023. Lecture Notes in Networks and Systems, vol 706. Springer, Cham. https://doi.org/10.1007/978-3-031-36960-5_55
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