The Study of Inter Flow Field and Impeller Strength for Thermal Power Unit Absorption Tower Desulphurization Pump

摘要

The study of inter flow field and impeller strength for thermal power unit absorption tower desulphurization pump were performed. The numerical simulation results of flow field in thermal power unit absorption tower desulphurization pump under 0.8Q operating point, 1 .OQ and 1.2Q were analyzed. The numerical simulation results of flow field were imported to ANSYS Workbench, and the structure field of thermal power unit absorption tower desulphurization pump was studied to find the stress distribution law of impeller. In the end, the strength of impeller was checked. The results show that the stress distribution of main impellers, back impellers and impeller-shroud is axial symmetrical and the maximum equivalent stress is located in the junction between the impeller-shroud and main impeller outlet, which means that this area has phenomena of stress fo-cus. This paper was performed to provide reference and guidance for the design of thermal power unit absorption tower desulphurization pump.