Full
Outline
To address the noise and vibration issues of high‑speed，large‑displacement scroll compressors，a dynamic model of the shaft system was established based on multibody dynamics theory.The force characteristics of the main and auxiliary bearings under high‑speed operating conditions were analyzed，followed by the optimized design of the motor counterweights.Subsequently，whole‑machine vibration tests were carried out for verification.The results indicate that，over the entire speed range of the scroll compressor，the loads on both the main and auxiliary bearings increase with the rise in rotational speed before and after optimization.After optimization，the bearing loads are significantly lower across the entire speed range.Specifically，at 8 000 r/min，the load on the main bearing is reduced by 21.06 N，and that on the auxiliary bearing by 7.73 N.Furthermore，over the full speed range，the optimized prototype exhibits lower vibration acceleration than the original prototype at most rotational speeds.At 6 000 r/min，the total vibration acceleration decreases from 20.41 m/s² to 9.88 m/s².This study provides theoretical support for improving the dynamic balance performance of high‑speed scroll compressors.
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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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