高速泵关键技术研究

发布时间：2018-06-19 21:39

本文选题：流体动压 + 推力轴承　；参考：《长春理工大学》2017年硕士论文

【摘要】：高速泵适用于扬程较高的输送场合,近年来被广泛应用在给排水工程、石油化工、能源、航空航天等国民经济各个部门的生产活动中。在运行过程中其稳定性是至关重要的。主轴上的推力滑动轴承是影响高速泵平稳运行的关键部件,因此,对推力轴承的承载性能研究已刻不容缓。本文主要基于流体动压润滑理论,利用CFD软件对泵中改进的推力滑动轴承结构进行承载性能的研究分析。论文首先对流体动压润滑承载机制以及控制方程基本理论进行论述,并介绍了CFD方法在仿真中的具体应用。接下来进行推力轴承流体计算域模型的建立,以网格划分、边界条件设定、物理模型的选择为主线对前处理过程进行了说明。在上述基础之上研究了双斜面轴瓦推力轴承结构参数、润滑油膜厚度以及转速的变化对承载性能的影响,并分析其变化规律。并与传统斜面轴承进行对比;其次,研究了带有环形槽的斜平面推力轴承中环形槽的结构参数对承载性能的影响。本文最后针对高速泵中的转子系统进行了转子动力学分析。利用SAMCEFRotors软件对输入轴和高速轴的模态振型和临界转速进行求解分析,防止轴系在运转过程中发生共振,进而影响正常运转。
[Abstract]:High speed pump is suitable for high lift transportation. In recent years, it has been widely used in water supply and drainage engineering, petrochemical, energy, aerospace and other sectors of the national economy production activities. Its stability is very important during operation. The thrust sliding bearing on the main shaft is the key component which affects the smooth operation of the high speed pump. Therefore, it is urgent to study the bearing capacity of the thrust bearing. In this paper, based on hydrodynamic lubrication theory, CFD software is used to study and analyze the bearing capacity of the improved thrust sliding bearing structure in the pump. Firstly, the loading mechanism of hydrodynamic lubrication and the basic theory of governing equation are discussed, and the application of CFD method in simulation is introduced. Then the fluid calculation domain model of thrust bearing is established. The preprocessing process is explained by mesh generation, boundary condition setting and selection of physical model. On the basis of the above, the influence of the structural parameters, the thickness of lubricating oil film and the rotational speed on the bearing performance of the thrust bearing with double inclined bearing is studied, and the variation law of the bearing capacity is analyzed. And compared with the traditional inclined bearing. Secondly, the influence of the structural parameters of annular groove on the bearing performance of the inclined plane thrust bearing with annular groove is studied. Finally, the rotor dynamics of the high-speed pump is analyzed. Using SAMCEF Rotors software, the modal modes and critical speed of the input shaft and the high-speed shaft are solved and analyzed to prevent the shafting from resonating in the course of operation, and then to affect the normal operation.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH38

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