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In order to achieve stable operation of a shaftless magnetic suspension centrifugal pump，this study investigates the hydrodynamic forces acting on the suspended rotor through numerical simulations and experimental validation. The internal flow field was analyzed under varying inlet flow rates，focusing on temporal variations of radial and axial forces. Additionally，the effects of valve plate height and rotor inlet diameter on rotor forces were examined. Results demonstrate that at 7 000 r/min with flow rates below 43.3 L/min，a stable vortex core forms at the rotor center accompanied by uniform low‑pressure distribution，yielding periodic hydraulic excitation forces with amplitude stability. At 75.0 L/min，vortex breakdown induces chaotic low‑pressure fluctuations and irregular high‑amplitude force oscillations. Valve plate height negligibly affects radial forces but significantly influences axial forces，showing a 20 N reduction per 1 mm height increase at 65.0 L/min.Although rotor inlet diameter minimally impacts force characteristics，the D+1 configuration improves efficiency by 2.1% than D configuration at high flow rate of 65.0 L/min.These findings provide critical guidelines for optimizing pump geometry to minimize rotor loads and enhance hydraulic performance.
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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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