發(fā)布時間：2018-08-08 16:20

【摘要】：將PM流量控制器用于無周向回油槽四腔向心靜壓軸承,建立了PM流量控制器靜壓軸承數(shù)學(xué)模型,重點(diǎn)研究分析了軸承結(jié)構(gòu)參數(shù)及PM流量控制器參數(shù)對靜壓軸承特性的影響。研究結(jié)果表明:軸承軸流封油邊系數(shù)越小、周流封油邊系數(shù)越大,軸承油膜剛度和承載力越大,初始油膜間隙增大,油膜剛度減小;潤滑油動力粘度較大且初始油膜間隙較小時,油膜剛度和承載力較大;液阻比越小,比流量越大,油膜剛度越大;供油壓力越大,油膜剛度、承載力和流量越大。同時基于線性化下液體靜壓軸承系統(tǒng)的傳遞函數(shù),利用Matlab Simulink軟件在時域和頻域內(nèi)分別研究了靜壓軸承系統(tǒng)的動態(tài)特性。研究結(jié)果表明:在階躍載荷作用下,隨著供油壓力和比流量的提高,過渡過程時間越短,靜壓軸承系統(tǒng)的動態(tài)特性越好;在正弦載荷作用下,提高供油壓力、比流量都會使軸心偏移量的穩(wěn)態(tài)幅值減小,油膜動剛度增大,且供油壓力較比流量對系統(tǒng)頻率特性的影響顯著。
[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.
【作者單位】： 湖南大學(xué)機(jī)械與運(yùn)載工程學(xué)院;湖南機(jī)電職業(yè)技術(shù)學(xué)院;
【基金】：國家科技重大專項(xiàng)項(xiàng)目(2012ZX04002-091)資助
【分類號】：TH133.36

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