Full
Outline
In the operation of hydroelectric generating unit, thrust bearings generate a considerable amount of residual heat due to load-bearing, friction, and other factors. Poor heat dissipation performance of lubricating oil can give rise to the tile burning phenomenon, thus causing massive economic losses. Nanoparticles can not only improve the lubrication characteristics of lubricating oil but also enhance the heat transfer process of lubricating oil. Accordingly, through numerical simulation, this study examined the heat dissipation enhancement effect of lubricating oil in thrust bearings when reinforced by nano-copper oxide particles with different concentrations (0.1wt%, 0.3wt%, 0.5wt%). The results demonstrate that the addition of nano-copper oxide can enhance the heat dissipation efficiency of lubricating oil, and the most favorable heat dissipation effect is achieved when the concentration of nano-copper oxide is 0.5wt%.
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| 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 |
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