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To study the lubrication characteristics of oil-cooled electric drive system, this article analyzed the splash lubrication characteristics of an oil cooled electric drive system and the phenomenon of poor low-speed lubrication under extreme attitudes, analyzed the forced lubrication and suction phenomenon of oil pump. The results show that the main characteristics of splash lubrication are poor lubrication at low flow rates and good lubrication at high flow rates; As the inclination angle increases, the flow rate shows a downward trend in uphill condition, while the flow rate in downhill conditions is just the opposite; The left tilt of 20° shows no lubrication effect and oil suction port is empty, while the right tilt of 20° shows poor oil stirring effect at low speed, while splash lubrication oil amount at left and right tilt is just the opposite. Forced lubrication can comprehensively consider the flow demand and proportion of the motor and reducer in the electric drive. The risk of empty suction of oil pumps will lead to forced lubrication failure. The solution of empty suction shall also consider the reduction of efficiency.
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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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