The Numeric Simulation Design Of Dynamic Magnetic Fluid Seals And Its Application At High Temperature

In the paper, the effect of temperature on the properties of magnetic materials and capacity of the magnetic fluid seal has been investigated based on the research achievements in home and abroad. For improving the static and dynamic seal properties of the magnetic fluid seal, the correlation between the seal capacity and the residual induction intensity and coercive force of permanent magnet has been studied. An ANSYS model for analyzing parametrically magnetic path was developed and optimize design of the magnetic path parameters has also been carried out based on the model and simulation analysis.In the design of magnetic seal, a baffling problem is too much computing work to obtain a reasonable solution within a sort time due to lots design parameters needing to be considered, especially whiling these parameters needs to be revised during design. For solving the problem, a software system was developed in the paper. The magnetic fluid seal device can be designed and optimized by using the software system. The software has been used in engineering and obtained a satisfaction result.A series of experiments were also done for verifying the theoretical results above. A magnetic fluid seal device for a new high capacity motor that oil is enclosed in it was also designed and checked on real engine test rig. The test result shows that the seal device can be used up to 160℃, which exceeds one time of define temperature value (80℃) recommended by engineering handbook.