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Surface texture design is an effective way to achieve small leakage, long life and highly reliable operation of mechanical end seals. To investigate the characteristics of the interface film of guide groove texture, through the design and preparation of semi-circular, herringbone and E-shaped guide groove textures, experiments and theoretical research under high-speed operation conditions were carried out, the influence of different guide groove textures on the tribological properties of end face seals was explored. The results show that the existence of the guide groove can effectively improve the bearing capacity of the interface film and improve the tribological performance. In numerical calculations, the results show that the frictional performances of face seals varied with the configuration of guide groove. The herringbone textures and E-type ones show an obvious guide-aggregation effect. When the lubricant in E-type texture after being guide-aggregation through the groove, the pressure accumulates at the textured tail barrier, and fluid in the face seal clearance cannot escape from the guide groove boundary. As a result,the low energy loss in system, and an optimal liquid film bearing capacity achieves. Under different depths, the existence of guide groove promotes the hydrodynamic pressure. With the increase in depth, the bearing capacity of the liquid film increases first and then decreases. For the E-shape texture, the optimum bearing capacity of liquid film Pav=0.527 5 MPa is obtained at h1=10 μm. The bearing capacity of fluid film of E-shape texture has a 51.2% increase in comparison to the common grooved texture, the value of frictional torque has a 53.5% decrease. The analysis show that, the configuration of guide groove results in an accumulation of lubricant on the top of texture, which enhances the pressure convergence, thereby improving the bearing capacity of the lubricating fluid film and reducing friction(‘guide⁃aggregation effect’). The geometric parameters of the guide groove have a significant impact on the fluid dynamic pressure in the end face sealing pair,which will influence the tribological performances of face seal. The research result provides theoretical support for the design of non-contact end face seal material surface texture in future.
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表面织构设计是实现非接触式机械端面密封低泄漏、长寿命、高可靠运行的有效途径。为考察导向槽织构的界面膜特性,通过设计制备半圆形、人字形与E形等导向槽织构,开展高速运行条件下的试验与理论研究,探究不同导向槽织构对端面密封摩擦学性能的影响。结果表明,导向槽的存在可以有效提升界面膜承载力,改善摩擦学性能。其中,E形导向槽织构性能表现最佳,在深度h1=10 μm时,液膜承载力最高可达Pav=0.527 5 MPa,相比普通沟槽形织构提高了104.6%,摩擦转矩数值降低了53.5%。分析认为沟槽形织构中导向槽的存在能够有效引导润滑介质在织构顶部产生有效聚集并形成压力收敛,进而提高润滑液膜承载力、减少摩擦(“引-聚效应”)。研究结果可为实际应用中非接触式端面密封材料表面织构设计提供参考。
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, authorsList=陈小亚, 张磊, 李蒙, 时礼平)}, authors=[Author(id=1241049268459459063, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=chenxiaoya2021@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1241049268597871099, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, authorId=1241049268459459063, language=EN, stringName=Xiaoya CHEN, firstName=Xiaoya, middleName=null, lastName=CHEN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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陈小亚,男,1998年生,安徽六安人,硕士研究生;主要研究方向为摩擦学与表面工程;E-mail:chenxiaoya2021@163.com。
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陈小亚,男,1998年生,安徽六安人,硕士研究生;主要研究方向为摩擦学与表面工程;E-mail:chenxiaoya2021@163.com。
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Geometric model of the microtexture of the mechanical-end seal ring’s surface, figureFileSmall=kG2WGQT6ViDI1Q4cZbNp2A==, figureFileBig=xYy/hyUV64BGHuJLSQ4fOA==, tableContent=null), ArticleFig(id=1241049274054660706, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=CN, label=图1, caption=
机械端面密封环表面微织构几何模型, figureFileSmall=kG2WGQT6ViDI1Q4cZbNp2A==, figureFileBig=xYy/hyUV64BGHuJLSQ4fOA==, tableContent=null), ArticleFig(id=1241049274520228457, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=EN, label=Fig.2, caption=
Surface morphology of the texture, figureFileSmall=qyKb0AbAUkQtmI3vZKMg6A==, figureFileBig=O1vAgOQwsJxbah7j4NMdHA==, tableContent=null), ArticleFig(id=1241049274599920237, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=CN, label=图2, caption=
织构表面形貌, figureFileSmall=qyKb0AbAUkQtmI3vZKMg6A==, figureFileBig=O1vAgOQwsJxbah7j4NMdHA==, tableContent=null), ArticleFig(id=1241049274679612017, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=EN, label=Fig.3, caption=
High-speed mechanical face seal tester, figureFileSmall=7/kCFBN0oKCpI4SkZeu7aQ==, figureFileBig=5dKmaHcDQ8eIEU0f+Rn8PQ==, tableContent=null), ArticleFig(id=1241049276525105784, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=CN, label=图3, caption=
高速机械端面密封试验台, figureFileSmall=7/kCFBN0oKCpI4SkZeu7aQ==, figureFileBig=5dKmaHcDQ8eIEU0f+Rn8PQ==, tableContent=null), ArticleFig(id=1241049276831289981, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=EN, label=Fig.4, caption=
Frictional performance of each texture at different depths, figureFileSmall=QiGeI0rBb1D2CfRGDy7xCA==, figureFileBig=3JW7ccTys5Ex9QNlQm2UXw==, tableContent=null), ArticleFig(id=1241049276894204544, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=CN, label=图4, caption=
不同深度下各导向槽织构摩擦学性能, figureFileSmall=QiGeI0rBb1D2CfRGDy7xCA==, figureFileBig=3JW7ccTys5Ex9QNlQm2UXw==, tableContent=null), ArticleFig(id=1241049277099725446, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=EN, label=Fig.5, caption=
Nephogram of liquid film bearing capacity with different guide groove textures, figureFileSmall=LDJaCex8hhB/RtRMUR25Zw==, figureFileBig=Gw13z+FTV1FWO3lKy6LS6g==, tableContent=null), ArticleFig(id=1241049277380743817, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=CN, label=图5, caption=
不同导向槽织构的液膜承载力云图, figureFileSmall=LDJaCex8hhB/RtRMUR25Zw==, figureFileBig=Gw13z+FTV1FWO3lKy6LS6g==, tableContent=null), ArticleFig(id=1241049277473018513, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=EN, label=Fig.6, caption=
Numerical calculation results of each texture at different depths, figureFileSmall=SzAXUBgNxmK4XQbdm7PqZw==, figureFileBig=ZuGm9IKvx090yH3z0jsa9g==, tableContent=null), ArticleFig(id=1241049277569487509, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=CN, label=图6, caption=
不同深度下各织构数值计算结果, figureFileSmall=SzAXUBgNxmK4XQbdm7PqZw==, figureFileBig=ZuGm9IKvx090yH3z0jsa9g==, tableContent=null), ArticleFig(id=1241049277779202714, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=EN, label=Fig.7, caption=
Flow field diagram for different guide groove textures, figureFileSmall=aaKQbs5Jtm+PjYIAvj29qg==, figureFileBig=57XkUFFUYdAA+QcYyw8hsA==, tableContent=null), ArticleFig(id=1241049277938586272, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=CN, label=图7, caption=
不同导向槽织构的流场图, figureFileSmall=aaKQbs5Jtm+PjYIAvj29qg==, figureFileBig=57XkUFFUYdAA+QcYyw8hsA==, tableContent=null), ArticleFig(id=1241049278257353385, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=EN, label=Tab.1, caption=
Geometrical parameters
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 Parameter | 值 Value |
|---|
| 外径Outer radius ro/mm | 20 |
| 内径Inner radius ri/mm | 14.50 |
| 单元域边长Length of computational domain L /mm | 2.50 |
| 导向槽宽度Width of guide groove a /mm | 0.20 |
| 织构宽度Texture width b /mm | 1.50 |
| 导向槽长度Length of guide groove c /mm | 1.25 |
| 密封间隙厚度Thickness of sealing clearance h0/μm | 5 |
| 织构深度Texture depth h1/μm | 5~20 |
), ArticleFig(id=1241049278358016685, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=CN, label=表1, caption=
几何参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 Parameter | 值 Value |
|---|
| 外径Outer radius ro/mm | 20 |
| 内径Inner radius ri/mm | 14.50 |
| 单元域边长Length of computational domain L /mm | 2.50 |
| 导向槽宽度Width of guide groove a /mm | 0.20 |
| 织构宽度Texture width b /mm | 1.50 |
| 导向槽长度Length of guide groove c /mm | 1.25 |
| 密封间隙厚度Thickness of sealing clearance h0/μm | 5 |
| 织构深度Texture depth h1/μm | 5~20 |
), ArticleFig(id=1241049278521594548, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=EN, label=Tab.2, caption=
Operating parameters
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 Parameter | 值 Value |
|---|
| 动力黏度Dynamic viscosity /(mPa·s) | 1.001 |
| 大气压力Atmospheric pressure P0/MPa | 0.103 |
| 空化压力Cavitation pressure P1/MPa | 0.02 |
| 润滑介质压力Lubricating medium pressure Pi /MPa | 0.60 |
| 轴向推力Axial force F/N | 50 |
| 转速Rotational speed ω /(r/min) | 3 000 |
), ArticleFig(id=1241049278706143932, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241049261165564305, language=CN, label=表2, caption=
工况参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 Parameter | 值 Value |
|---|
| 动力黏度Dynamic viscosity /(mPa·s) | 1.001 |
| 大气压力Atmospheric pressure P0/MPa | 0.103 |
| 空化压力Cavitation pressure P1/MPa | 0.02 |
| 润滑介质压力Lubricating medium pressure Pi /MPa | 0.60 |
| 轴向推力Axial force F/N | 50 |
| 转速Rotational speed ω /(r/min) | 3 000 |
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