Numerical Simulation and Optimization Design for Magnetic Fluid Sealing Device
In this paper the principle of magnetic fluid seals is discussed. Based on the finite element software ANSYS, the magnetic field of magnetic fluid sealing device with three slots and four pole teeth is analyzed, and the size parameters of magnetic fluid sealing pole are optimized. The results show that the difference between the maximum and minimum intensity of magnetic field in the area near the shaft determine the sealing capacity of sealing device. The gap of seal should not be larger than 0.3mm. The optimized parameters which are provided for practical design can increase sealing capacity of sealing device as well as decrease the volume of sealing device.
Numerical analysis on the action of centrifuge force in magnetic fluid rotating shaft seals
The magnetic fluid seal is suitable for high-speed rotating shaft seal applications. Centrifuge force will have evident influence on magnetic fluid rotating shaft seals. The seal capacity of the rotating shaft seal can be improved or increased by some measures. Through hydrodynamic analysis the moving status of the magnetic fluid is worked out. By numerical method, the magnetic field and the isobars in the magnetic fluid of a seal device are computed. Then the influence of the centrifuge force on the magnetic fluid seal is calculated quantitatively.
Some aspects of permanent-magnet aerospace-instrument devices
The paper presents modeling techniques for simulating permanent magnets in computer-aided analysis for either the finite-element or finite-difference schemes, methods to deal with various geometries and inherent symmetry that may be a characteristic of the problem. By numberically analyzing the model, detailed flux-distribution plots have been obtained by means of a high-speed digital computer. The paper discusses typical cases that have been studied. By making the computer programs sufficiently flexible for a given class of problems, various configurations could be studied with the ultimate aim of optimized designs, size and weight reduction, and improved sensitivity, stability and overall reliability.