Full
Outline
Aiming at the issues of complex structure and poor self‑sealing in traditional positive displacement pumps，a double‑acting five‑blade scraper pump was designed.Using the up‑and‑down scrapers to replace the reciprocating vanes found in traditional vane pumps，creating a novel non‑valved，compact fluid power device.Based on the 2.5D dynamic grid coupled viscous wall strategy and experimental testing，a fluid-solid coupling analysis was conducted on a double‑acting five‑blade scraper pump.The stress distribution and deformation distribution characteristics of the rotor scraper under pressure load were obtained under the influence of flow field characteristics，as well as the modal characteristics of the rotor scraper.The results indicate that the fluid-solid coupling significantly affects the structure of the rotor‑scrapers.The stress and deformation of the rotor scrapers decrease with the increasing of rotational speed.Specifically，with the rotational speed increased from 900 r/min to 2 700 r/min，the maximum equivalent stress decreases by 24.56%，and the maximum deformation decreases by 13.79%.The vibration frequency of rotor and scraper under different load pressure has no obvious change，and the wet mode vibration frequency is slightly lower than that under fluid-solid coupling.This study provides valuable insights into the structural optimization and design of double‑acting five‑blade scraper pumps.
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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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