PM流量控制器节流液体静压轴承静动态特性分析
发布时间：2018-08-08 16:20
【摘要】：将PM流量控制器用于无周向回油槽四腔向心静压轴承,建立了PM流量控制器静压轴承数学模型,重点研究分析了轴承结构参数及PM流量控制器参数对静压轴承特性的影响。研究结果表明:轴承轴流封油边系数越小、周流封油边系数越大,轴承油膜刚度和承载力越大,初始油膜间隙增大,油膜刚度减小;润滑油动力粘度较大且初始油膜间隙较小时,油膜刚度和承载力较大;液阻比越小,比流量越大,油膜刚度越大;供油压力越大,油膜刚度、承载力和流量越大。同时基于线性化下液体静压轴承系统的传递函数,利用Matlab Simulink软件在时域和频域内分别研究了静压轴承系统的动态特性。研究结果表明:在阶跃载荷作用下,随着供油压力和比流量的提高,过渡过程时间越短,静压轴承系统的动态特性越好;在正弦载荷作用下,提高供油压力、比流量都会使轴心偏移量的稳态幅值减小,油膜动刚度增大,且供油压力较比流量对系统频率特性的影响显著。
[Abstract]:The PM flow controller is applied to the hydrostatic bearing with four cavities with no circumferential return tank. The mathematical model of the static bearing of the PM flow controller is established. The influence of bearing structure parameters and PM flow controller parameters on the hydrostatic bearing characteristics is studied. The results show that the smaller the oil edge coefficient is, the greater the circumferential seal edge coefficient is, the greater the bearing film stiffness and bearing capacity are, the larger the initial oil film clearance is, and the smaller the oil film stiffness is. The larger the dynamic viscosity of the lubricating oil is and the smaller the initial oil film clearance is, the greater the film stiffness and bearing capacity are; the smaller the liquid resistance ratio is, the greater the specific flow rate is, the greater the oil film stiffness is; the greater the oil supply pressure is, the greater the oil film stiffness, the bearing capacity and the flow rate are. At the same time, based on the transfer function of hydrostatic bearing system under linearization, the dynamic characteristics of hydrostatic bearing system in time domain and frequency domain are studied by Matlab Simulink software. The results show that with the increase of oil supply pressure and specific flow rate, the shorter the transition time, the better the dynamic characteristics of the hydrostatic bearing system, and the higher the oil supply pressure under sinusoidal load. The steady amplitude of the axial offset decreases and the dynamic stiffness of the oil film increases with the specific flow rate, and the influence of the specific flow rate on the frequency characteristics of the system is more significant than that of the specific flow rate.
【作者单位】： 湖南大学机械与运载工程学院;湖南机电职业技术学院;
【基金】：国家科技重大专项项目(2012ZX04002-091)资助
【分类号】：TH133.36
本文编号：2172344
[Abstract]:The PM flow controller is applied to the hydrostatic bearing with four cavities with no circumferential return tank. The mathematical model of the static bearing of the PM flow controller is established. The influence of bearing structure parameters and PM flow controller parameters on the hydrostatic bearing characteristics is studied. The results show that the smaller the oil edge coefficient is, the greater the circumferential seal edge coefficient is, the greater the bearing film stiffness and bearing capacity are, the larger the initial oil film clearance is, and the smaller the oil film stiffness is. The larger the dynamic viscosity of the lubricating oil is and the smaller the initial oil film clearance is, the greater the film stiffness and bearing capacity are; the smaller the liquid resistance ratio is, the greater the specific flow rate is, the greater the oil film stiffness is; the greater the oil supply pressure is, the greater the oil film stiffness, the bearing capacity and the flow rate are. At the same time, based on the transfer function of hydrostatic bearing system under linearization, the dynamic characteristics of hydrostatic bearing system in time domain and frequency domain are studied by Matlab Simulink software. The results show that with the increase of oil supply pressure and specific flow rate, the shorter the transition time, the better the dynamic characteristics of the hydrostatic bearing system, and the higher the oil supply pressure under sinusoidal load. The steady amplitude of the axial offset decreases and the dynamic stiffness of the oil film increases with the specific flow rate, and the influence of the specific flow rate on the frequency characteristics of the system is more significant than that of the specific flow rate.
【作者单位】： 湖南大学机械与运载工程学院;湖南机电职业技术学院;
【基金】：国家科技重大专项项目(2012ZX04002-091)资助
【分类号】：TH133.36
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