Dynamic Characteristic Analysis of Centrifugal Pump Impeller Based on Fluid-Solid Coupling

Purpose: Centrifugal pumps are prone to vibration problems during operation due poor dynamic characteristics of its impellers that serve as the only running parts such devices; impeller main reasons for centrifugal pump. Therefore, it is important study internal fluid flow and influence on pump explore causes transient start-up process. The understanding phenomena may lead better design impellers. Methods: geometry channel inside established using Creo 4.0 software (American PTC company). computer simulation carried out Flomaster V9 (UK Flowmaster company) obtain variation law speed pump, which loaded into calculation process was further processed fluid-structure coupling method, structural under radial force obtained by harmonic response analysis. Results: During starting first increased sharply then decreased until reaching a stable this period, changed sharply; overall amplitude fluctuated stably at 0.01 mm. In unsteady numerical changes periodically. time domain signal transformed frequency signal, fundamental passing blade 101.67 Hz 610 Hz, respectively. Conclusions: cause vibration, has least impact structure condition relatively large off-design condition. order ensure necessary avoid working non-standard condition, especially small