编织衬垫自润滑关节轴承性能评估

发布时间：2018-01-23 11:55

本文关键词： 关节轴承编织衬垫摩擦学行为磨损机理粘结质量　出处：《河南科技大学》2012年硕士论文　论文类型：学位论文

【摘要】：自润滑关节轴承是在内、外圈之间镶嵌或粘结一层自润滑衬垫层，用衬垫层与内圈钢的摩擦来代替内外圈直接的钢与钢摩擦，从而实现其在航空航天、铁路机械等领域自润滑等方面的要求；其主要失效形式是磨损，磨损使关节轴承内外圈配合间隙增大；也会出现衬垫粘结不牢而脱落，导致摩擦系数升高，失去自润滑功能；而当关节轴承套圈承受重载时，套圈会产生较大变形，出现关节轴承套圈破裂的失效现象。因此，开展关节轴承粘结质量、摩擦学性能及其承载性能的研究，对提高关节轴承的使用性能，延长使用寿命有着十分重要的意义。本文以PTFE/芳纶纤维衬垫自润滑关节轴承为研究对象，对不同前处理方法及不同粘结剂制备的轴承进行剥离强度测试和摩擦学性能试验，研究了不同前处理方法、不同粘结剂及摆动条件对关节轴承粘结质量、摩擦学性能的影响，并分析了自润滑关节轴承的等效应力分布、承载变形分布规律。主要研究工作如下：通过对不同前处理方法及不同粘结剂的关节轴承进行衬垫剥离试验，分析了衬垫剥离强度的影响因素规律。对不同前处理方法及不同粘结剂的轴承进行了不同摆动频率和不同摆动方式的摩擦学性能试验，探讨了前处理方法、粘结剂及摆动条件等因素对自润滑关节轴承摩擦系数、磨损量及摩擦温度的影响。确立了最佳的前处理方法和粘结剂类型。并对比了国内外同型号关节轴承的粘结质量以及摩擦学性能，对现有国内关节轴承进行了评价。采用扫描电子显微镜(SEM)、能谱仪(EDS)对不同前处理及不同粘结剂关节轴承自润滑衬垫磨损表面进行了微观形貌分析，探讨了前处理方法、粘结剂及摆动条件等因素对自润滑衬垫磨损机理的影响。研究结果对进一步改善自润滑关节轴承粘结工艺以及其摩擦学性能具有一定的参考价值。利用ANSYS有限元软件分析了编织衬垫关节轴承等效应力分布状态，得到了关节轴承最大等效应力以及最大位移变形；并用试验结果验证了数值模拟承载变形的正确性和准确性。数值分析结合实际试验验证，，为自润滑关节轴承配副摩擦学性能与摩擦磨损机制转变提供了可靠依据。
[Abstract]:Self-lubricating joint bearings are embedded or bonded a layer of self-lubricating liner between the outer ring and the outer ring. The friction between the inner ring and the inner ring steel is used to replace the direct steel friction between the inner ring and the outer ring so as to realize the friction between the inner ring and the outer ring in the aeronautics and astronautics. Railway machinery and other areas of self-lubricating requirements; The main failure form is wear and wear, which makes the joint bearing inner and outer ring fit clearance increase. It will also appear that the gasket is not firmly bonded and falls off, resulting in the increase of the friction coefficient and the loss of self-lubricating function. However, when the joint bearing ring is under heavy load, the ring will be deformed and the failure of joint bearing ring will occur. Therefore, the bond quality, tribological performance and bearing capacity of the joint bearing will be studied. It is of great significance to improve the performance of joint bearings and prolong their service life. This paper takes PTFE / aramid fiber liner self-lubricating joint bearings as the research object. The peeling strength and tribological properties of the bearings prepared by different pretreatment methods and different binders were tested. The bond quality of the joint bearings was studied with different pretreatment methods, different binders and swing conditions. The influence of tribological properties, and the distribution of equivalent stress and load deformation of self-lubricating joint bearings are analyzed. The main research work is as follows: The peeling tests of joint bearings with different pretreatment methods and different binders were carried out. The influence factors of the peeling strength of the liner are analyzed. The tribological performance tests of bearings with different swing frequencies and different swing modes are carried out with different pretreatment methods and different binders, and the pre-treatment methods are discussed. The friction coefficient of self-lubricating joint bearing is affected by binder and swing condition. The effects of wear amount and friction temperature on the adhesion quality and tribological properties of the same type of joint bearings at home and abroad were compared. The present domestic joint bearings are evaluated. Scanning electron microscope (SEM) and energy spectrometer (EDS) were used to analyze the wear surface of self-lubricating liner of different pre-treated and different binder joint bearings, and the pre-treatment method was discussed. The effects of binder and swing conditions on the wear mechanism of self-lubricating liner are discussed. The results have some reference value for further improving the bonding process and tribological properties of self-lubricating joint bearings. The equivalent force distribution of braided pad joint bearing is analyzed by using ANSYS finite element software, and the maximum equivalent stress and the maximum displacement deformation of the joint bearing are obtained. The correctness and accuracy of the numerical simulation are verified by the experimental results, and the numerical analysis is combined with the actual test to verify the correctness and accuracy of the numerical simulation. It provides a reliable basis for the tribological properties and the transformation of friction and wear mechanism of self-lubricating joint bearings.
【学位授予单位】：河南科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH133.3

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