| Now the application of the self-lubricating joints bearing is more and more widely, but more and more requirements of materials are put forward for the complicated conditions such as high-temperature and overloading. TiAL-based self-lubricating composite material (TA) has high specific strength, good oxidation resistance and wearability at high temperatures, so it’s a promising materials which is used as high-temperature and lightweight joint bearing, but there is few research on this material for the manufacturing joint bearing. In this paper, the software ANSYS was used to analyze the joint bearing which was manufactured by this composite material in high temperature and overloading. And then, through the optimization analysis the reasonable structure of the TA material joint bearing was got. This study laid the foundation of the further experimental and the manufacture of joint bearing. In addition, this study provided a theoretical basis for the self-lubricating joint bearing which is used in high-temperature and heavy-loading environment.Hertz theory was used to calculate the contact pressure and displacement, and the calculated value closely related to the external loading. The method of the finite element for the contact problem was researched, and the factors affecting the accuracy of solving bearing contact problem was analyzed. Finally, the iterative calculation formulas of contact pressure and friction force in ANSYS contact algorithm were summarized, these studies laid a foundation for finite element analysis of joint bearing.The modeling of the spherical plain bearing was established by the software Solidworks, the bearing was analyzed under pure radial load by the finite element software ANSYS. In the same conditions, the stress and deformation on the outer ring were significantly greater than the inner ring, so the strength material should be selected for the outer ring, and the self-lubrication material which has good friction performance should be selected for the inner ring. TA material can be used to manufacture the inner ring of the bearing. Under the same load, the stress and strain of TA material self-lubricating spherical plain bearing were compared with the gasket type self-lubricating spherical plain bearing and the inlay type of self-lubricating spherical plain bearing. Through the analysis, it was found that the TA material self-lubricating spherical plain bearing was more suitable for working in overload conditions. When the load increased, the stress, contact pressure and friction force of the TA material self-lubricating bearing linearly increased with the load increased. The growth speed of the outer ring stress and the contact pressure were fast.The simplified model of the spherical plain bearing was directly established in ANSYS coupling field. Thermal-stress coupling analysis was carried on the bearing which inner ring material was TA material or bearing steel. TA materials had obvious advantages than the ordinary bearing steel under the high temperature of 500℃. In contact surface, the temperature and stress increased slowly over time. A large number of experiments had been carried on spherical plain bearing which inner ring material was TA material. The influence on stress of the change of load and sliding speed was observed. The temperature and stress of bearing were greater when the load and sliding speed were greater. When the load was large or the sliding speed was high, the rising speed of the bearing’s temperature was faster and faster as the prolongation of time.Single factor and multiple factors analysis was conducted on spherical plain bearing which inner ring material was TA material. The influencing factors on the bearing’s stress, contact pressure and friction were analyzed respectively, such as the width of the inner and outer ring, ball diameter. Finally, the TA self-lubricating spherical plain bearing which had smaller stress and contact pressure was got through structural optimization. |
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