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| 1 | Friction Characteristics of Mechanical Seals with Laser-textured Seal Faces显示文摘Heat generated by friction between faces of mechanica l seals is a major factor that causes deterioration of the seals and shortens th eir service life. Excessive temperature rise can greatly alter the seal geometry and vaporize the sealing fluid, resulting in friction of boundary lubrication. These effects on face seals usually lead to excessive leakage and ultimately ren der the seal inoperable. In order to maintain the reliability of seals, high fri ction and unwanted wear must be avoided. Using the laser-texturing process to produce regular micro-surface structures is a fast and convenient technique compared to some more conventional etching or erosion technique currently used by the seal industry for various grooved face seals. Indeed, by using a pulse laser, better control is obtained on the geometr y, size and pore ratio of seal rings made of metallic or ceramic materials. In t his study, seal rings are made of silicon carbide and carbon. Mating faces of th e rings are polished and only silicon carbide rings are laser-textured. The las er texturing can be controlled to produce spherical pores at selected diameters, depths and pore ratio. The textured rings are then super-polished to remove th e bulges formed on the pores rims. After this process the average pore diameter, pore depth and pore ratio reach the predetermined parameter. Some untextured ri ngs are also treated to the same surface roughness and served as a reference for comparison of the textured rings. A special test rig is used to simulate a mech anical seal system and to measure the effect of the laser texturing on friction and seal performance. Tests are performed at various rotational speeds and vario us axial loads. Compared with the conventional mechanical seals, temperature rise, friction torq ue and friction coefficient of mechanical seals with laser-textured seal faces are much lower. These preliminary results show the potential of improving fricti on performance and increasing seal life with laser-textured seal faces. | YU Xin-qi 1,2, HE Song 1, CAI Ren-ling 1 (1. Research Institute of Pressure Vessel and Process Equi pment, East China University of Science and Technology, Shanghai 200237, China 2. College of Mechanical Science and Engineering, Hebei University of Science an d Technology, Shijiazhuang 050018, China) | 2002 | 厦门大学学报(自然科学版)2002，41，S1： | 9 |
| 2 | Analysis of macular edema after cataract surgery in patients with diabetes using optical coherence tomography显示文摘 | Kim SJ Equi R Bressler NM | 2007 | Ophthalmology2007，114，5： | 1 |
| 3 | Long-Term Preservation of Vision in Progressive Outer Retinal Necrosis Treated with Combination Antiviral Drugs and Highly Active Antiretroviral Therapy显示文摘 | Stephen J. Kim Robert Equi Marie-Lyne Belair Howard F. Fine James P. Dunn | 2007 | Ocular Immunology and Inflammation2007，，6： | 1 |
| 4 | Endogenous Serratia marcescens en- dophthalmitis with dark hypopyon: case report and review显示文摘 | Equi RA Green WR | 2001 | Survey of ophthalmology2001，46，3： | 1 |
| 5 | Long term preservation of vision in progressive outer retinal necrosis treated with combination antiviral drugs and highly active antiretroviral therapy显示文摘 | Kim SJ Equi R Belair ML | 2007 | Ocul Immunol Inflamm2007，15，6： | 1 |
| 6 | Case-control study of Stenotrophomonas mahophilia acquisition in cystic fibrosis patients显示文摘 | Marchac V Equi A Le Bihan-Benjamin C | 2004 | Eur Respir J2004，23，1： | 1 |
| 7 | Oxidation of putrescine and cadaverine derivatives by diamine oxidases 显示文摘 | Equi A M Brown A M Cooper A | 1991 | Tetrahedron1991，47，3： | 1 |
| 8 | A combined transportation and scheduling problem显示文摘 | EQUI L GALLO G MARZIALE S | 1997 | European Journal of Operational Research1997，97，1： | 1 |
| 9 | A Combined Transportation and Scheduling Problem 显示文摘 | L Equi G Gallo S Marziale and A Weintraub | 1996 | Working Paper Pisa University Pisa Italy1996，，8： | 1 |
| 10 | Long term azithromycin inchildren with cystic fibrosis:a randomised,placebo-controlled,crossover trial显示文摘 | Equi A Balfour-Lynn I Bush A | 2002 | Lancet2002，360，9338： | 1 |
| 11 | Benign strictures ofthe esophagus:endoscopic approach with Savary-Gilliardbougies显示文摘 | Novais P Lemme E Equi C | 2008 | Arq Gastroenterol2008，45，4： | 1 |
| 12 | Analysis of macular edema after cataract surgery in patients with diabetes using optical coherence tomography 显示文摘 | KIM S J EQUI R BRESSLER NM | 2007 | Ophthalmology2007，114，5： | 1 |
| 13 | Long-term preservation of vision in progressive outer retinal necrosis treated with combination antiviral drugs and highly active antiretroviral therapy显示文摘 | Kim SJ Equi R Belair ML | 2007 | Ocul Immunol Inflamm2007，15，6： | 1 |
| 14 | Timing of dexamethasone treatment in experimental Staphylococcus aureus endophthalmitis 显示文摘 | Yoshizumi M O Lee G C Equi R A | 1998 | Retina1998，18，2： | 1 |
| 15 | Idiopathic retinitis,vasculitis,aneurysms,and neuroretinitis (IRVAN):new observations and a proposed staging system显示文摘 | Samuel MA Equi RA Chang TS | | 0，，： | 1 |
| 16 | Case-control study of Stenotrophomonas maltophilia acquisition in cystic fibrosis patients显示文摘 | Marchac V Equi A Le-Bihan-Benjamin C | 2004 | Eur Respir J2004，23，1： | 1 |
| 17 | Analysis of macular edema after cataract surgery in patients with diabetes using optical coherence tomography显示文摘 | Kim SJ Equi R Bressler NM | 2007 | Ophthalmology2007，114，： | 1 |
| 18 | A combined transportation and scheduling Problem显示文摘 | Equi L GaUo G Marziale S | 1997 | Working Paper Pisa University Pisa Italy1997，，1： | 1 |
| 19 | Analysis of macular edema after cataract surgery in patients with diabetes using optical coherence tomography显示文摘 | Kim SJ Equi R Bressler NM | 2007 | Ophthalmology2007，114，5： | 1 |
| 20 | A combined transportation and scheduling problem显示文摘 | Equi L Galio G Marziale S | 1997 | European Journal of Operational Research1997，，97： | 1 |
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