Modal calculation and analysis of compact magnetic pump
TONG Kai1, KONG Fanyu1, ZHOU Yisong2, QIAN Wenfei1, WANG Jiaqiong1
1. National Research Center of Pump, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. Bureau of Housing and Urban-Rural Development of Jiangning, Nanjing, Jiangsu 211100, China
Abstract：In order to ensure the safe operation of the magnetic pump unit and verify the rationality of its structural design, the fluid field and the structural components of the pump were modeled with Pro/E software,meanwhile, modal calculation and analysis of compact magnetic pump, combined with the influence of the axial frequency of the pressure pulsation, the blade frequency and the harmonic freque-ncy, of the pressure pulsation were made based on ANSYS Workbench. The calculation results show that the natural frequencies of the first six orders of the magnetic pump components are consistent with the amplitude trend in the prestressed and non-prestressed states, and the amplitude of the change is not large in the prestressed state compared with that in non-prestressed state. For the rotating impeller, the modal deformation is mainly concentrated at the edge of the impeller; the position of inlet tube of the static component pump body is more prone to deform; and the position of the middle axle sleeve of the static component isolation cover is more prone to deform. The natural frequencies of each order of magnetic pump are far away from the induced excitation frequency, and the magnetic pump is not easy to resonate. The calculation results prove that the structure of compact magnetic pump is reasonable. It also provides some re-ferences for the structure design and optimization of similar structure magnetic pump in the future.
