| Citation: | LI Luonan, XU Jianmin, HAN Yong, et al. Analysis and optimization of splash lubrication characteristics of high speed gear under low temperature conditions[J]. Journal of Aerospace Power, 2025, 40（12）：20240864 doi: 10.13224/j.cnki.jasp.20240864
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In view of the unclear lubrication characteristics of high-speed gear transmission under low temperature conditions and the limited improvement of lubrication effect by traditional baffles, a study on the splash lubrication characteristics of high-speed gear transmission was carried out. Firstly, based on the theory of computational fluid dynamics, a two-phase flow analysis model of splash lubrication of high-speed gear transmission was established, and the two-phase flow distribution characteristics were analyzed; then, on this basis, the influences of number of rotations, gear speed, and oil immersion depth on splash lubrication characteristics and torque loss were studied; finally, a bionic honeycomb baffle structure was proposed and its structure was optimized using a multi-island genetic algorithm. The results showed that: in the splash lubrication process of high-speed gear transmission under low temperature conditions, the volume fraction of lubricating oil on the tooth surface decreased with the increase of gear speed, but increased with the increase of oil immersion depth; the torque loss increased with the increase of gear speed and oil immersion depth, and the influence of speed on torque loss was much greater than that of oil immersion depth; under the same working conditions, the average volume fraction of lubricating oil on the tooth surface of the optimized bionic honeycomb baffle structure increased by 68.46% compared with the one without baffle, and increased by 7.88% compared with the original baffle. Research results provide a basis for the study of two-phase flow distribution characteristics of high-speed gear transmission under low-temperature conditions and the optimization design of splash lubrication for high-speed gear transmission.
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