Full
Outline
Aiming at the issue of insufficient accuracy in leakage prediction for metal sealing rings，which leads to increased R&D costs，a leakage prediction method based on statistical characteristics is proposed.The surfaces of C‑shaped metal sealing rings made of two materials （GH4169 and GH738） after grinding and polishing were scanned using a laser confocal microscope to obtain their micro‑anisotropic surface morphology.Based on statistical methods，an anisotropic rough surface model was constructed.This model was combined with finite element analysis and computational fluid dynamics to predict the leakage rate of the sealing ring，and a study on the influencing factors was conducted.Experimental validation shows that the error between the numerically calculated leakage and the actual measured leakage is only about 10%.Under the same working conditions，when the sealing pressure difference is reduced from 0.6 MPa to 0.3 MPa，the leakage rate of the sealing ring decreases by 49.6%；when the root mean square roughness of the sealing ring surface is reduced from 1.2 μm to 0.9 μm，the leakage rate decreases by approximately 43%；when the surface contact stress increases from 0 MPa to 380 MPa，the leakage rate decreases by about 98.7%.These results indicate that the sealing performance of the ring can be improved by reducing the surface root mean square roughness，increasing the surface contact stress，and reducing the pressure difference between the inner and outer cavities.This study provides a theoretical basis for the subsequent development and evaluation of metal sealing rings.
87
31
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
