螺旋槽水润滑橡胶合金轴承动压润滑特性与动态接触有限元仿真分析
发布时间：2018-12-10 23:43
【摘要】：水润滑橡胶轴承由于其良好的润滑性能，在船舶艉轴推进系统，潜水泵，洗衣机等设备上得到了普遍的认可和广泛应用。针对水润滑轴承，在科学领域对其进行了多方面的研究，包括橡胶材料，内部结构，磨擦学特性等。 螺旋槽水润滑橡胶合金轴承是重庆大学王家序教授在对水润滑橡胶轴承多年的研究基础上，对其进行结构创新得出的新型水润滑轴承。比普通的直槽结构的水润滑橡胶轴承制作工艺复杂，而其性能也有了很大的改进。 论文结合动压润滑机理，对螺旋槽水润滑橡胶合金轴承的动压特性进行了研究。首先根据轴承安装间隙和螺旋槽橡胶面结构，确定了其内部流场在稳定工况下的具体形貌，借助专业的流体计算软件ANSYS CFX对橡胶合金轴承运行过程中的内部流场进行了详细的分析，研究了不同的转速，不同偏心率，不同过渡圆角，不同螺旋角度，不同供水量，不同沟槽数目等对流体动压域内压力分布，承载力，流场速度的影响。然后对流场中出现的漩涡进行详细分析，对漩涡理论进行了验证。 由于在工作过程中，流场内部不可能是理想状况下的纯净水，必然含有不同泥沙等颗粒。论文根据实际情况，在前人研究基础上，将含有泥沙颗粒等的流场描述成为了流体-固体二相流流场。根据二相流和颗粒侵蚀磨损理论，对由泥沙颗粒可能对橡胶造成的侵蚀磨损进行了对比分析。对磨损有可能发生的位置，大小进行了初步的预测，结合漩涡理论，论证了流场中的漩涡对于排除污染颗粒作用。 由于橡胶在流场压力作用下会产生变形，进而改变了流场的稳定形貌，进而使得流场的动压润滑特性发生变化。在此种情况下，引入流固耦合计算模型，研究流场动压性能对橡胶变形的影响。 实际工作过程中，运动轴由于外伸端受到来自身和外界复杂的力学工况，有可能有短暂的集中力冲击情况。橡胶的作用就是用来对冲击进行缓冲。因此，，借助ABAQUS对不同沟槽数目和不同冲击载荷下的动态接触进行了仿真分析，得到了多沟槽数目有利于缓冲冲击，橡胶短暂缓冲作用下，会产生回弹，从而恢复形貌。 论文内容得到国家自然科学基金面上项目“大尺寸高比压水润滑轴承系统的创新设计理论与方法”（项目编号：50775230）的支持，拟通过上述研究对螺旋槽水润滑橡胶合金轴承的动压特性，排污能力和动态接触及保护提供相关研究方法和新的借鉴。
[Abstract]:Water lubricated rubber bearings have been widely accepted and widely used in marine stern shaft propulsion system, submersible pump, washing machine and so on because of their good lubricating performance. Water lubricated bearings are studied in many fields, including rubber materials, internal structure, friction characteristics and so on. The water lubricated rubber alloy bearing with spiral groove is a new type of water lubricated bearing based on the research of water lubricated rubber bearing by Professor Wang Jiaxun of Chongqing University for many years. The manufacturing process of water-lubricated rubber bearings is more complicated than that of plain straight-grooved rubber bearings, and its performance has been greatly improved. In this paper, the hydrodynamic characteristics of rubber alloy bearings lubricated by spiral grooves are studied in combination with hydrodynamic lubrication mechanism. Firstly, according to the mounting clearance of the bearing and the rubber surface structure of the spiral groove, the specific morphology of the internal flow field under the steady working condition is determined. The internal flow field of rubber alloy bearing was analyzed in detail with the help of professional fluid calculation software ANSYS CFX. Different rotational speeds, different eccentricities, different transition angles, different helical angles and different water supply were studied. The influence of different grooves on pressure distribution, bearing capacity and flow velocity in hydrodynamic pressure domain. Then the vortex in the flow field is analyzed in detail, and the vortex theory is verified. Because in the working process, the flow field interior cannot be ideal pure water, must contain the different sediment and so on particle. On the basis of previous studies, the flow field containing sediment particles is described as a fluid-solid two-phase flow field. According to the theory of two-phase flow and particle erosion wear, the erosion and wear caused by sediment particles to rubber were compared and analyzed. The possible position and size of wear are preliminarily predicted. Combined with vortex theory, the effect of swirl in flow field on the removal of contaminated particles is demonstrated. Due to the deformation of rubber under the pressure of the flow field, the stable morphology of the flow field is changed, and the hydrodynamic lubrication characteristics of the flow field are changed. In this case, the effect of hydrodynamic pressure on rubber deformation is studied by introducing the fluid-solid coupling model. In the actual working process, because the extension of the shaft is subjected to complex mechanical conditions from the body and the outside world, there may be a transient concentrated force impact. Rubber acts as a buffer against shocks. Therefore, the dynamic contact under different groove numbers and different impact loads is simulated by ABAQUS. The results show that the number of multiple grooves is favorable to buffer the impact, and the rubber short buffer will produce springback and restore the morphology. The paper is supported by the project "innovative Design Theory and method of large size and High specific pressure Water Lubricating bearing system" (Project No.: 50775230), supported by the National Natural Science Foundation of China. This study is intended to provide a new reference for the dynamic pressure characteristics, discharge capacity, dynamic contact and protection of rubber alloy bearing with spiral groove water lubrication.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH133.3
本文编号：2371433
[Abstract]:Water lubricated rubber bearings have been widely accepted and widely used in marine stern shaft propulsion system, submersible pump, washing machine and so on because of their good lubricating performance. Water lubricated bearings are studied in many fields, including rubber materials, internal structure, friction characteristics and so on. The water lubricated rubber alloy bearing with spiral groove is a new type of water lubricated bearing based on the research of water lubricated rubber bearing by Professor Wang Jiaxun of Chongqing University for many years. The manufacturing process of water-lubricated rubber bearings is more complicated than that of plain straight-grooved rubber bearings, and its performance has been greatly improved. In this paper, the hydrodynamic characteristics of rubber alloy bearings lubricated by spiral grooves are studied in combination with hydrodynamic lubrication mechanism. Firstly, according to the mounting clearance of the bearing and the rubber surface structure of the spiral groove, the specific morphology of the internal flow field under the steady working condition is determined. The internal flow field of rubber alloy bearing was analyzed in detail with the help of professional fluid calculation software ANSYS CFX. Different rotational speeds, different eccentricities, different transition angles, different helical angles and different water supply were studied. The influence of different grooves on pressure distribution, bearing capacity and flow velocity in hydrodynamic pressure domain. Then the vortex in the flow field is analyzed in detail, and the vortex theory is verified. Because in the working process, the flow field interior cannot be ideal pure water, must contain the different sediment and so on particle. On the basis of previous studies, the flow field containing sediment particles is described as a fluid-solid two-phase flow field. According to the theory of two-phase flow and particle erosion wear, the erosion and wear caused by sediment particles to rubber were compared and analyzed. The possible position and size of wear are preliminarily predicted. Combined with vortex theory, the effect of swirl in flow field on the removal of contaminated particles is demonstrated. Due to the deformation of rubber under the pressure of the flow field, the stable morphology of the flow field is changed, and the hydrodynamic lubrication characteristics of the flow field are changed. In this case, the effect of hydrodynamic pressure on rubber deformation is studied by introducing the fluid-solid coupling model. In the actual working process, because the extension of the shaft is subjected to complex mechanical conditions from the body and the outside world, there may be a transient concentrated force impact. Rubber acts as a buffer against shocks. Therefore, the dynamic contact under different groove numbers and different impact loads is simulated by ABAQUS. The results show that the number of multiple grooves is favorable to buffer the impact, and the rubber short buffer will produce springback and restore the morphology. The paper is supported by the project "innovative Design Theory and method of large size and High specific pressure Water Lubricating bearing system" (Project No.: 50775230), supported by the National Natural Science Foundation of China. This study is intended to provide a new reference for the dynamic pressure characteristics, discharge capacity, dynamic contact and protection of rubber alloy bearing with spiral groove water lubrication.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH133.3
【参考文献】
相关期刊论文 前10条
1 徐姚,张政,程学文,郑玉贵,柯伟,姚治铭;旋转圆盘上液固两相流冲刷磨损数值模拟研究[J];北京化工大学学报(自然科学版);2002年03期
2 王优强,李鸿琦,佟景伟;水润滑橡胶轴承[J];轴承;2002年10期
3 彭晋民,王家序,余江波,杨成云;水润滑塑料合金轴承摩擦性能实验[J];重庆大学学报(自然科学版);2001年06期
4 吴文权,黄远东;液固两相流中流体旋涡对固体粒子运动影响的数值研究[J];工程热物理学报;1999年03期
5 吴仁荣;水润滑轴承在离心泵结构中的应用[J];机电设备;1997年04期
6 荀振宇;徐鹏;张少凯;刘宇;;水槽结构对水润滑尾轴承润滑性能的影响研究[J];江苏船舶;2010年03期
7 周建辉;刘正林;朱汉华;海鹏洲;;船舶水润滑橡胶尾轴承摩擦性能试验研究[J];武汉理工大学学报(交通科学与工程版);2008年05期
8 吴建康,李安峰;双向人字槽液体润滑径向轴承动力性能[J];机械科学与技术;2002年02期
9 吴仁荣;水润滑轴承在船用泵中的应用[J];流体工程;1989年05期
10 梅丹;幸福堂;;气固两相流风机磨损率的数值预测研究[J];流体机械;2007年10期
相关会议论文 前1条
1 彭娅玲;张志国;陈汝钢;方成跃;;船舶艉部水润滑轴承润滑特性的数值分析研究[A];2007年船舶力学学术会议暨《船舶力学》创刊十周年纪念学术会议论文集[C];2007年
相关硕士学位论文 前4条
1 杨艳妮;星载天线在轨热稳定性影响因素分析[D];西安电子科技大学;2007年
2 刘琴华;船舶尾轴承水润滑特性数值计算与试验研究[D];武汉理工大学;2008年
3 卢磊;水润滑橡胶合金轴承接触及润滑特性分析[D];重庆大学;2010年
4 张莹博;水润滑橡胶轴承动力润滑特性研究[D];西安科技大学;2010年
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