本文選題：液氣比 + 混合潤滑　； 參考：《潤滑與密封》2016年04期

【摘要】：針對小液滴均勻分布在氣相中的兩相潤滑狀態(tài)下的密封工況,建立氣液混合物理模型,推導氣液兩相混合流體的等效黏度,建立氣液混合潤滑動壓密封端面間的氣液混合潤滑Reynolds方程。利用MATLAB軟件編寫有限元程序求解氣液混合潤滑Reynolds方程,得到動壓密封端面間氣液混合流體的壓力分布及密封性能參數,并分析在操作工況一定時,液氣比對密封性能的影響。分析結果表明:在相同的膜厚下,液滴增強了端面流體動壓效應;動壓密封在運轉過程中,端面密封間隙、摩擦功耗和質量泄漏率隨液氣比的增加而增加,體積泄漏率隨液氣比的增加而減少,而剛度隨液氣比的增加先增加后降低,存在最大值。
[Abstract]:The physical model of gas-liquid mixing is established for the condition of sealing under the condition of homogeneous distribution of small droplets in gas phase under the condition of two-phase lubrication, and the equivalent viscosity of gas-liquid two-phase mixed fluid is deduced. The Reynolds equation of gas-liquid mixed lubrication between the end surfaces of hydrodynamic seal was established. The finite element software MATLAB is used to solve the Reynolds equation of gas-liquid mixed lubrication. The pressure distribution and sealing performance parameters of the gas-liquid mixed fluid between the end surfaces of the dynamic pressure seal are obtained. The effect of liquid-gas ratio on the sealing performance is analyzed when the operating conditions are fixed. The results show that under the same film thickness, the droplet enhances the hydrodynamic pressure effect on the end face, and the gap, friction power consumption and mass leakage rate increase with the increase of the liquid-gas ratio during the operation of the hydrodynamic seal. The volume leakage rate decreases with the increase of the liquid-gas ratio, while the stiffness increases first and then decreases with the increase of the liquid-gas ratio, and there is a maximum value.
【作者單位】： 北京化工大學機電工程學院;
【基金】：國家重點基礎研究發(fā)展計劃項目(973計劃)(2012CB026000)
【分類號】：TH136

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本文編號：1777471