目的 对现有临床引流装置进行改进,设计了两种新型的结构并进行有限元分析,对比两种结构并验证其是否满足临床使用的设计需求。方法 新结构一、二分别采用电磁驱动方式及永磁体磁化方式进行吸合,建立有限元模型,比较两种结构在施加不同电流大小作用下的受力情况,分析其磁力线分布及磁感应强度云图,设计模拟实验进行初步实验研究。结果 结构一通1A电流时仿真电磁力为6.35N,实验值为6.08N,磁感应强度最大出现在两铁芯接触面处。结构二仿真电磁力为6.89N,实验值为6.68N,磁感应强度集中分布在永磁体-铁芯段。结论 两种结构设计均符合临床设计需求,结构二在使用过程中更具备安全性,极大地降低了引流风险。同时有限元分析及实验测试验证了结构的可行性。
Objective The existing clinical drainage device was improved, two new structures were designed and finite element analysis was performed, and the two structures were compared and verified to meet the design requirements for clinical use. Methods The new structures 1 and 2 adopt electromagnetic driving method and permanent magnet magnetization method to pull in, establish a finite element model, compare the force conditions of the two structures under the application of different current magnitudes, analyze the magnetic field line distribution and magnetic induction intensity cloud diagram, design The simulation experiment is used for preliminary experimental research. Results The simulated electromagnetic force was 6.35 N when the mechanism passed a 1A current, and the experimental value was 6.08 N. The maximum magnetic induction intensity appeared at the contact surface between the two iron cores. In mechanisms 2, the simulated electromagnetic force is 6.89N, and the experimental value is 6.68N. The magnetic induction intensity is concentrated in the permanent magnet-iron core section. Conclusion Both structural designs are in line with clinical design requirements, and the second structure is more secure during use, which greatly reduces the risk of drainage. At the same time, the finite element analysis and experimental tests verify the feasibility of the structure.