精密液体静压主轴薄膜反馈节流器结构设计及特性研究
发布时间：2018-09-01 13:45
【摘要】：液体静压轴承、滑轨或者传动机构,都是利用外部提供的流体压力设备或轴承或滑轨内具有多腔室的结构设计,来保持流体压力的稳定。对于液体静压轴承,除了轴承本身以外,还必须有节流器及供油装置。薄膜反馈节流器在国外高档机械设备中已得到了大量的应用,且对我国形成了技术垄断,阻碍了我国精密液体静压主轴技术的发展及推广应用。针对薄膜反馈节流器的研究,首先建立物理模型,通过有限元软件ANSYS建立耦合模型;对节流器流体与金属弹性薄膜进行双向流固耦合分析,研究膜片上的压力分布对节流器节流特性的影响,得到不同压力作用下金属弹性薄膜的变形,并总结出其变化规律。针对薄膜的性能和变形系数进行了分析研究,得到变形系数与薄膜厚度之间的关系;对薄膜反馈节流器的结构进行优化设计,并对其与液体静压主轴的装配体进行设计分析,得到一种薄膜反馈节流器新结构;分析节流器材料特性与轴承特性的关系,并对薄膜的压力变形和硬度分别进行了实验,为节流器参数的选取提供依据。最后对薄膜反馈节流器液体静压主轴的静态特性和动态特性进行了实验分析,对其回转精度、刚度和承载能力进行实验研究,得到薄膜反馈节流器对液体静压轴承性能的影响数据,综合各种影响因素并对节流器的设计提出建设性意见。
[Abstract]:Hydrostatic bearings, sliding rails or transmission mechanisms are designed to maintain the stability of fluid pressure by using externally provided fluid pressure equipment or structural design of multi-chamber chambers in bearings or sliding rails. For hydrostatic bearings, in addition to the bearing itself, there must also be throttle and oil supply device. The thin-film feedback throttle has been widely used in foreign high-grade mechanical equipment, and has formed a technical monopoly in China, which hinders the development and application of precision hydrostatic spindle technology in China. In view of the research of thin-film feedback throttle, the physical model is established, the coupling model is established by finite element software ANSYS, and the two-way fluid-structure coupling analysis of the throttle fluid and metal elastic film is carried out. The influence of pressure distribution on the throttling characteristics of the throttle is studied. The deformation of the metal elastic film under different pressures is obtained and the variation law of the film is summarized. The relationship between the deformation coefficient and the film thickness is obtained, the structure of the film feedback throttle is optimized, and the assembly of the hydrostatic spindle is designed and analyzed. A new structure of thin-film feedback throttle is obtained, and the relationship between material characteristic and bearing characteristic of throttle is analyzed, and the pressure deformation and hardness of thin film are experimented respectively, which provides the basis for selecting the parameters of throttle. Finally, the static and dynamic characteristics of the hydrostatic spindle of the thin-film feedback throttle are analyzed experimentally, and the rotary accuracy, stiffness and bearing capacity of the spindle are studied experimentally. The influence data of thin-film feedback throttle on the performance of hydrostatic bearing were obtained, and some constructive suggestions on the design of the throttle were put forward.
【学位授予单位】：中原工学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH133.3
本文编号：2217391
[Abstract]:Hydrostatic bearings, sliding rails or transmission mechanisms are designed to maintain the stability of fluid pressure by using externally provided fluid pressure equipment or structural design of multi-chamber chambers in bearings or sliding rails. For hydrostatic bearings, in addition to the bearing itself, there must also be throttle and oil supply device. The thin-film feedback throttle has been widely used in foreign high-grade mechanical equipment, and has formed a technical monopoly in China, which hinders the development and application of precision hydrostatic spindle technology in China. In view of the research of thin-film feedback throttle, the physical model is established, the coupling model is established by finite element software ANSYS, and the two-way fluid-structure coupling analysis of the throttle fluid and metal elastic film is carried out. The influence of pressure distribution on the throttling characteristics of the throttle is studied. The deformation of the metal elastic film under different pressures is obtained and the variation law of the film is summarized. The relationship between the deformation coefficient and the film thickness is obtained, the structure of the film feedback throttle is optimized, and the assembly of the hydrostatic spindle is designed and analyzed. A new structure of thin-film feedback throttle is obtained, and the relationship between material characteristic and bearing characteristic of throttle is analyzed, and the pressure deformation and hardness of thin film are experimented respectively, which provides the basis for selecting the parameters of throttle. Finally, the static and dynamic characteristics of the hydrostatic spindle of the thin-film feedback throttle are analyzed experimentally, and the rotary accuracy, stiffness and bearing capacity of the spindle are studied experimentally. The influence data of thin-film feedback throttle on the performance of hydrostatic bearing were obtained, and some constructive suggestions on the design of the throttle were put forward.
【学位授予单位】：中原工学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH133.3
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