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以在线式全流量可视铁谱仪为背景,对静磁场的磁路进行了设计。采用轴向充磁,双环异极嵌套安装方式,两环的间隙采用不导磁的材料做成的圆环作为衬套,并从磁荷模型出发,利用标量磁位法,引入广义二项式定理对同心双环嵌套磁体产生的磁感应强度进行了解析计算。通过对比磁感应强度的理论值和实际测量值发现解析表达式很好地反映了静磁场的磁感应强度分布规律。将所设计的静磁场应用到某新型涡喷航空发动机性能监测中,对监测到的磨粒进行了分析。分析结果间接验证了所设计的静磁场在润滑油高流速条件下吸附铁磁颗粒的有效性。
Based on the on-line full-flow visual iron spectrometer, the magnetic circuit of static magnetic field is designed. Using axial magnetization, double-pole nested installation, the gap between the two rings made of non-magnetic material made of the ring as a bushing, and from the magnetic charge model, the use of scalar magnetic method, the introduction of generalized binomial Type theorem to calculate the magnetic induction intensity of the concentric double-ring nested magnet. By comparing the theoretical value of the magnetic flux density and the actual measured value, it is found that the analytic expression well reflects the magnetic flux density distribution of the static magnetic field. The designed static magnetic field is applied to the performance monitoring of a new turbojet engine, and the monitored abrasive particles are analyzed. The analysis results indirectly verify the effectiveness of the designed static magnetic field to adsorb the ferromagnetic particles under the conditions of high lubricating oil flow rate.