Hydrodynamic lubrication performance of lip seal with inclined micropores manufactured on rotary shaft surface

doi:10.11949/j.issn.0438-1157.20141123

CIESC Journal ›› 2015, Vol. 66 ›› Issue (2): 678-686.DOI: 10.11949/j.issn.0438-1157.20141123

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Hydrodynamic lubrication performance of lip seal with inclined micropores manufactured on rotary shaft surface

JIANG Huasheng^1,2, MENG Xiangkai¹, SHEN Mingxue¹, PENG Xudong¹

1 School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China;
2 School of Biological and Chemical Engineering, Jiaxing University, Jiaxing 314001, Zhejiang, China

Received:2014-07-28 Revised:2014-10-10 Online:2015-02-05 Published:2015-02-05
Supported by:
supported by the National Basic Research Program of China (2014CB046404) and the National Natural Science Foundation of China (51375449, 51305398).

唇形密封轴表面方向性微孔的润滑特性

江华生^1,2, 孟祥铠¹, 沈明学¹, 彭旭东¹

1 浙江工业大学机械工程学院, 浙江杭州 310014;
2 嘉兴学院生物与化学工程学院, 浙江嘉兴 314001

通讯作者: 彭旭东
基金资助:
国家重点基础研究发展计划项目(2014CB046404);国家自然科学基金项目(51375449,51305398)。

Abstract

Abstract:

In order to study the effects of shaft surface inclined micropores on lubrication performance of lip seal, a mathematical model of lip seal under steady state was developed based on mass conservation with Jakobsson- Floberg-Olsson (JFO) cavitation boundary condition. The lubrication governing equation was solved by the finite element method, and the non-dimensional reverse pumping rate and friction force were obtained, then a comparative study of lip seal lubrication performance for different shaft surface inclined micropores shapes (ellipse, rectangle, diamond, isosceles triangle) was conducted. Micropores symmetrical with the shaft tangential direction produced zero reverse pumping rate, while others with 45° inclination to the axial direction produced maximum reverse pumping rate. Friction force was minimum when the micropore oil wedge dimension along the tangential direction was minimum. Reverse pumping rate and friction force decreased with micropore depth. Micropores with higher shape factor could produce higher reverse pumping rate and lower friction force. Rectangle micropore produced the maximum reverse pumping rate and minimum friction force among four kinds of micropores under the same conditions.

Key words: lip seal, inclined micropores, JFO cavitation, reverse pumping rate, friction force

摘要：

为研究方向性微孔对唇形密封润滑特性的影响,建立了遵循质量守恒的JFO空化边界条件的唇形密封润滑理论模型,采用有限单元法求解雷诺控制方程,获得了泵汲率、摩擦力等性能参数,对比分析了椭圆形、矩形、菱形、等腰三角形4种不同形状方向性微孔织构唇形密封的润滑特性。结果表明:微孔结构对称于轴切向时泵汲率为零,而与轴线呈45°倾斜时具有最大泵汲率;微孔结构沿轴切向形成的油楔尺寸最小时,具有最小摩擦力;增加微孔深度将使泵汲率下降,但能减小摩擦力;增大形状因子既可以提高泵汲率,又能减小摩擦力;相同条件下,矩形微孔具有最大泵汲率和最小摩擦力。

关键词: 唇形密封, 方向性微孔, JFO空化, 泵汲率, 摩擦力

CLC Number:

TH117.2

JIANG Huasheng, MENG Xiangkai, SHEN Mingxue, PENG Xudong. Hydrodynamic lubrication performance of lip seal with inclined micropores manufactured on rotary shaft surface[J]. CIESC Journal, 2015, 66(2): 678-686.

江华生, 孟祥铠, 沈明学, 彭旭东. 唇形密封轴表面方向性微孔的润滑特性[J]. 化工学报, 2015, 66(2): 678-686.

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Hydrodynamic lubrication performance of lip seal with inclined micropores manufactured on rotary shaft surface

唇形密封轴表面方向性微孔的润滑特性

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