自润滑关节轴承固化工艺的有限元模拟研究

Finite element simulation of self lubricating spherical plain bearing curing process

针对自润滑关节轴承中聚四氟乙烯(PTFE)衬垫粘合问题,利用有限元软件ANSYS建立了GE100ET-2RS/PTFE自润滑关节轴承三维分析模型,得出了在固化工艺中,轴承内外圈、衬垫、固化固化工艺套环中的等效应力、接触应力以及接触应力随固化温度变化曲线,研究了固化工艺套环结构、固化温度对等效应力、接触应力分布的影响;同时对衬垫进行了剥离强度试验并根据试验结果对固化工艺套环进行了结构优化设计。研究结果表明,套环与轴承外圈的过盈量与固化温度对在固化工艺中衬垫的所受到的固化压力值影响较大,且固化压力与PTFE衬垫剥离强度之间呈线性正比关系;套环与外圈之间最佳过盈量为0.034 mm,套环最佳厚度为14.236 mm,优化后衬垫上平均接触压力从0.6 MPa提高到1.3 MPa,说明该优化方案可以用于有效地提高PTFE衬垫粘合质量。

Aiming at the self lubricating joint bearing Teflon （PTFE） liner adhesion, the model of GEIOOET-2RS/PTFE self-lubricating spherical plain bearing was established by the ANSYS. The equivalent stress and the contact stress in outer ring, the inner ring, the liner and the curing process ring were obtained. The contact stress-temperature curve was also obtained. The effects of the structure of curing process ring and the curing temperature on the distribution of bearing＇s equivalent stress and contact pressure were predicted. And the curing process ring structure optimization calculation depended the results of the peel strength experiment was carried on. The results indicate that the interferenee between curing process ring and outer ring and the curing temperature has great influence on the liner＇s contact stress. The curing pressure is linearly proportional to PTFE liner peeling strength. The optimum interference between curing process ring and outer ring is 0.034 mm, and the curing process ring＇s optimum thickness is 14. 236 mm, and the optimized liner＇s mean contact stress is increased form 0. 6 MPa to 1.3 MPa. So the optimization scheme can effectively improve the PTFE liner＇s bonding quality.