# Research on Temperature Field Analysis Method of High-Speed Bearing Chamber-Bearing System
## 4 Conclusions  
This article proposes a decoupling method based on the finite volume method, which separates fluid motion from the thermal analysis of the solid temperature field. A study was conducted to investigate the oil-air distribution within the bearing chambers and the temperature distribution of the bearing chamber-bearing system under three different operating conditions. Firstly, geometric and discrete models of the bearing chamber-bearing system and the individual bearing chambers within the system are established. Utilizing the Volume of Fluid (VOF) method, the characteristics of the oil-air two-phase distribution within the bearing chamber are determined under specified conditions, including bearing speed, load, oil flow rate, and oil inlet temperature. The convective heat transfer boundary conditions derived from this analysis are then applied as thermal boundary conditions for the temperature distribution of the bearing chamber-bearing system. Secondly, a thermal analysis model for the entire bearing chamber-bearing system is established, and the temperature field of the system is calculated under the three operating conditions. Finally, the temperature distribution of the bearing chamber-bearing system is obtained. Under the three operating conditions, the rotational speed, bearing axial load, oil inlet temperature, and oil mass flow rate remain constant, with the only variation being the radial load of the bearing, which differs between individual bearings. This results in minimal changes to the bearing heat generation. Consequently, the maximum temperature of the bearing chamber-bearing system under the three operating conditions is essentially the same, at approximately 179 \({}^{\circ}\)C. The temperature field distributions under Operating Conditions 1, 2, and 3 are generally consistent, indicating that the region surrounding the oil supply pipeline is cooled, while the bearing chamber is heated through convective heat transfer with the splashed oil, with the highest temperature occurring in the central bearing chamber. The calculated results are found to be largely consistent with experimental data, with an error of less than 10%. This validates the thermal analysis model presented in the article, demonstrating its ability to accurately reflect the heat generation, two-phase flow, heat transfer, and temperature distribution within the bearing chamber-bearing system. Furthermore, it confirms the feasibility of the decoupling method proposed, providing technical support for the research of bearing chamber-bearing systems and offering significant practical value in engineering applications. Compared with the traditional heat-fluid-solid coupling method, the decoupling method proposed in this paper saves 90.75% of the calculation time under the condition of using only 21.9% of the number of computer cores, which achieves the effect of using a  
Figure 8: Temperature distribution of the bearing chamber-bearing system under Operating Condition 1.  
lower computer specification and significantly improves the efficiency of the calculation, which is of great significance for engineering practice. The application of the method of this paper in the research of bearing oil breakage can be explored in the future. Conceptualization, P.G. and J.Z. ; methodology, P.G. ; software, M.L. ; validation, M.L., J.Z. and Z.L. ; formal analysis, P.G. ; investigation, Z.L. ; resources, Z.L. ; data curation, P.G. ; writing--original draft preparation, J.Z. ; writing--review and editing, J.Z. ; visualization, M.L. ; supervision, Z.L. ; project administration, M.L. ; funding acquisition, P.G. All authors have read and agreed to the published version of the manuscript.