Affiliations: [a] Department of Energy and Power Engineering, Tsinghua University, Beijing, China | [b] Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China
Correspondence:
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Corresponding author: Suyuan Yu, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China. Tel./Fax: 010 627 88687; E-mail: [email protected]
Abstract: Active magnetic bearings (AMBs) have been extensively used in the vibration reduction of rotating machinery because of active control technology. In fact, the mechanical characteristics of the magnetic bearing are also important for vibration isolation as the main vibration transmission path. In this paper, a finite element (FE) model of a 30 kW magnetic suspended prototype pump suspended by 5-DOF AMBs was established to simulate the vibration transmission of the system. Two external excitations, unbalanced force of the rotor and hydrodynamic force acted on the impeller were considered. Based on the model, several main factors that affect the vibration transmission of magnetic suspended pump were investigated, such as mass distribution of the system, the equivalent stiffness of the AMBs and the rubber vibration isolators were investigated. Based on the above work, a new magnetic suspended pump was developed. The results of simulation and experiments show that the new design can effectively reduce the vibration transmission of the system.
Keywords: Active magnetic bearings, magnetic suspended pump, equivalent stiffness, vibration isolation, model
