本文關(guān)鍵詞： 液膜密封 空化 承載能力 表面粗糙度　出處：《潤滑與密封》2017年06期 　論文類型：期刊論文

【摘要】：為進一步探索表面粗糙度對液膜密封影響,基于質(zhì)量守恒的JFO空化模型,建立粗糙表面直線槽液膜密封物理模型,采用有限體積法離散控制方程并用Gauss-Seidel松弛迭代法求解,分析表面粗糙度、膜厚及操作工況特征數(shù)對液膜密封空穴發(fā)生及承載能力的影響。結(jié)果表明:以空化面積比為判據(jù),液膜中空穴區(qū)域隨膜厚增大而增大但承載能力呈減小趨勢,且兩者均隨工況特征數(shù)的增大而增大;在膜厚較小如低于5~6μm時,較大表面粗糙度有助于促生空穴和提升承載能力,而在膜厚較大時,其影響減弱甚至被忽略;在較高工況特征數(shù)時,較大表面粗糙度對承載能力的提升影響明顯,而在較低工況特征數(shù)時,較大表面粗糙度對空穴區(qū)域的增大影響明顯。
[Abstract]:In order to further explore the effect of surface roughness on liquid film seal, based on the JFO cavitation model of mass conservation, the physical model of linear groove liquid film seal with rough surface was established. The finite volume method is used to discretize the governing equation and the Gauss-Seidel relaxation iteration method is used to analyze the surface roughness. The effect of film thickness and operating condition characteristic number on the cavitation generation and bearing capacity of liquid film seal is studied. The results show that the cavitation area increases with the increase of film thickness, but the bearing capacity decreases with the increase of film thickness. And both of them increase with the increase of working condition characteristic number. When the film thickness is smaller than 5 渭 m, the larger surface roughness is helpful to promote cavity growth and enhance the bearing capacity, but when the film thickness is larger, the influence is weakened or even neglected. At higher operating conditions, the larger surface roughness has an obvious effect on the increase of the loading capacity, while at the lower operating condition, the larger surface roughness has an obvious effect on the increase of the hole region.
【作者單位】： 中國石油大學(華東)密封技術(shù)研究所;
【基金】：國家自然科學基金項目(51375497) 山東省自主創(chuàng)新及成果轉(zhuǎn)化專項(2014ZZCX10102-4)
【分類號】：TH136
【正文快照】： )j縥縥縥縥縥縥縥，

本文編號：1452800