复合材料油膜轴承衬套的界面结合性能研究

发布时间：2018-03-03 05:13

本文选题：油膜轴承衬套　切入点：分子动力学　出处：《太原科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：油膜轴承广泛应用于重型机械、大型水利水电及航空航天工程等领域。衬套作为油膜轴承的核心部件,其结构和运行过程中的受力情况对油膜轴承的使用性能起着至关重要的作用。作为油膜轴承中最易损的零件,衬套复合材料的结合问题容易导致衬套损坏。因此,对于复合材料油膜轴承衬套的结合性能研究有非常重要的意义。本文通过对衬套界面的微观模拟分析,了解其界面结合的机理,研究其界面结合能的影响因素;通过对于衬套实际工作中所受的力场进行分析,研究对于衬套应力分布的影响因素;并通过试验对于新型复合材料衬套的结合性能进行了研究。为提高衬套的结合性能提供了一定的参考。其主要研究内容如下:(1)基于分子动力学理论,对于衬套复合材料的界面进行了分子尺度的建模,对其进行分子动力学模拟并对界面结合能进行计算,研究了衬套界面结合的机理。并对有无锡层对于界面结合性能的影响进行了研究。模拟计算了不同厚度巴氏合金层界面的界面结合能,从微观角度探究了巴氏合金厚度对于衬套界面结合性能的影响。(2)对于衬套实际的受力进行了分析和计算,利用厚壁圆筒理论计算了衬套所受的装配应力,并通过衬套有限元模拟验证其计算的可靠性。对有无装配应力下的衬套进行了分析,同时对于衬套有无摩擦力时的情况进行了模拟,研究摩擦力对于衬套的影响。(3)对于不同挂金形状表面的衬套进行有限元模拟,观察其对于衬套应力分布等的影响。对于不同厚度巴氏合金层的衬套所受应力情况进行了模拟分析,研究了巴氏合金厚度对于衬套应力的影响,研究结论对衬套结构的设计和改进提供了一定参考。(4)对于新型工艺下的复合材料油膜轴承衬套进行结合性能的试验研究,选定合适的试验方法,对常用的两种实验方法进行了对比分析。对实验试样进行双金属结合强度破坏性试验,测出其结合强度。同时,与其它工艺的结合强度进行了对比,并对衬套的制造工艺提出了建议。
[Abstract]:Oil film bearing is widely used in heavy machinery, large-scale water conservancy and hydropower and aerospace engineering and other fields. As the core component of the oil film bearing bushing, using the force performance of the structure and operation process of oil film bearing plays a vital role. As the most vulnerable in the oil film bearing parts, combined with the problem of Bush composite material is easy to cause the liner damage. Therefore, the composite material of the oil film bearing bushing has a very important significance in performance research. Through analysis of microscopic simulation of liner interface, understand the interface bonding mechanism of the interface factors can influence; through the bushing by the actual work in the field analysis of the factors influencing the stress distribution in bushing; and through the test was used to study the binding properties of new composite materials. In order to improve the performance of bushing bushing To provide a certain reference. The main research contents are as follows: (1) based on the theory of molecular dynamics, the liner composite interface for modeling molecular scale, molecular dynamics simulations are performed on the interface and the binding energy is calculated, studies the mechanism of interfacial bonding. Bush and the Wuxi layer on the interface bonding performance the effect of the different thickness of interface Babbitt layer interface simulation of binding energy, from the microscopic point of view to explore the impact of Babbitt Bush thickness on the interfacial properties. (2) the Bush actual stress was analyzed and calculated by calculating the bushing assembly stress using thick walled cylinder the theory of reliability and the liner finite element simulation verifies the computing. On the bush without assemblage stress are analyzed, at the same time for the situation when the Bush has no friction of die To study for the influence of friction lining. (3) were simulated for different liner hanging gold surfaces, to observe the effect of the stress distribution of the bushing. The bushing Babbit layer with different thickness on stress are analyzed by simulation, studied the effect of Ba's alloy thickness for lining should be the conclusion of the study on the lining structure design and provides some reference for improvement. (4) for the composite model under the process of oil film bearing bush are combined with the experimental study on the performance, select the appropriate test method, two kinds of methods are compared and analyzed. The experimental samples are double metal bonding strength destructive test, measure the bonding strength. At the same time, compared with a combination of strength and other processes, and proposes the manufacturing process of bushing.

【学位授予单位】：太原科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH133.3

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