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Outline
Aiming at addressing issues such as noise，vibration，and component wear caused by rotor system imbalance and hydraulic excitation in high‑temperature molten salt circulation main pumps，this paper analyzes the influence of fluid‑induced forces on the dynamic response of the pump rotor system.Taking a new type of cold salt pump as the research object，the unsteady flow field inside the pump is calculated using Ansys CFX software to obtain the radial forces on each stage impeller under different operating conditions.Based on the SAMCEF platform，the critical speed and mode shapes of the pump rotor are analyzed，and the transient response of the rotor system under radial forces at different flow rates is investigated，with validation through clear water experiments.The results show that the discrepancy between the performance curves of clear water and 300 °C molten salt is within 5%；under the 1.0Q condition，the radial force on the first‑stage impeller is 4 350 N，which is significantly greater than that on the other impellers；under different flow conditions ranging from 0.6Q to 1.4Q，the radial forces on the first‑stage and fifth‑stage impellers exhibit opposite variation patterns due to rotor-stator interaction；the critical speed of the rotor system is 1 894.5 r/min，indicating that resonance will not occur at the rated speed；when radial forces are not considered，the transient displacements of all impellers show regular elliptical patterns，with the fourth‑stage impeller having the largest displacement of 7.1×10⁻⁶ mm；when radial forces are considered，the radial displacements of all impellers become complex due to shaft system constraints，and the fifth‑stage impeller exhibits the largest transient displacement of 0.289 4 mm.The research findings can provide a reference for the optimal design of the cold salt pump rotor system.
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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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