Influence of self-sealing performance of hydrophobic surface on face of mechanical seal

被引：0

作者：

Peng X. ^{[1
]}

Liu X. ^{[1
]}

Meng X. ^{[1
]}

Li J. ^{[1
]}

Sheng S. ^{[1
]}

机构：

[1] Engineering Research Center of Process Equipment and its Remanufacture, Zhejiang University of Technology, Hangzhou 310032, Zhejiang

来源：

Huagong Xuebao/CIESC Journal | 2011年 / 62卷 / 05期

关键词：

Hydrophobic surface; Laser surface textured; Liquid surface tension coefficient; Mechanical seal; Self-sealing;

D O I：

10.3969/j.issn.0438-1157.2011.05.027

中图分类号：

学科分类号：

摘要：

The lubrication film thickness developed between the two faces in a mechanical seal normally ranges in size from 1 to 15 μm. Therefore the influence of the surface tension of sealing medium cannot be ignored. In this paper a study of sealing ability of a laser-textured surface mechanical seal(LST-MS) with hydrophobic surface located at the inner radius was performed. The geometrical models of hydrophobic surface with nano-columns or nano-pores were presented, and their self-sealing ability was theoretically proved. The Reynolds equation for controlling film pressure between the two faces of such a LST-MS was solved by using the finite element method. The effects of surface tension coefficients of the sealing medium on film stiffness, opening force and leakage rate were studied at different rotational speeds and sealing pressures. It was proved theoretically that such a LST-MS could get zero-leakage under specific conditions. The results showed that when the LST-MS operated at the rotational speeds lower than 100 r·min-1 and low fluid pressure ratios lower than 2, film stiffness and opening force were kept high while leakage was substantially decreased. The film thickness fluctuation would take place due to external perturbation, but leakage would be controlled by using barrier fluids or flushing fluids with high surface tension coefficients. The width ratio of hydrophobic face to seal face was optimized in the range from 0.01 to 0.10. © All Rights Reserved.

引用

页码：1365 / 1370

页数：5

共 17 条

[1]

Jiang L., Feng L., Bionic Intelligent Nano Interface Materials, (2007)

[2]

Zhou Y., Engineering Fluid Mechanics, (2006)

[3]

Ren X., Liu N., Qu Z., Et al., Effect of wettability alteration on the relative permeability of low-permeability water-wet oil and gas reservoirs, Petroleum Exploration and Development, 32, 3, pp. 123-124, (2005)

[4]

Song X., Zhang L., Cao X., Et al., Effects of wettability on oil and water flow through porous media, Oilfield Chemistry, 25, 4, pp. 305-308, (2008)

[5]

Gu Z., Zhou Q., Wei C., Et al., New methods of exploiting liquid repellent textile, Cotton Textile Technology, 1, pp. 13-16, (2002)

[6]

Fu Y., Liu P., Wang D., Et al., Development and present condition of waterproof and moisture permeable fabrics, J. Qingdao University, 14, 4, pp. 33-35, (1999)

[7]

Tao N., Dyeing and Finishing Engineering, 4, (2007)

[8]

Peng X., Li J., Anti-wear constructions of a mechanical seal face, (2008)

[9]

Etsion I., Burstein L., A model for mechanical seals with regular microsurface, Tribology Trans., 39, 3, pp. 677-683, (1996)

[10]

Etion I., Halperin G., A laser surface textured hydrostatic mechanical seal, Sealing Technology, 3, pp. 6-10, (2003)

← 1 2 →