Abstract:

A mathematical model of the urethra valve was built based on the theories of electromagnetics and hydromechanics. The model was used to analyze the characteristics of the urethra valve effected by different electromagnet current, air gap and so on. The validity of the model was confirmed through the comparison between simulations and experiments. The effects of the urethra valve on the micturition characteristics of the bladder power pump were studied on simulation experimental system. The results show that the increasing of electromagnet current and the decreasing of air gap between electromagnet and urethra valve are beneficial to increasing maximal urine flow rate and decreasing urine flow time. The research provides the basis for characteristics analysis and optimal structure design of the bladder power pump.

Key words: bladder power pump, urethra valve, urine flow rate, urine flow time

摘要：

运用电磁学理论和流体力学理论,建立了尿道阀的数学模型,利用该模型仿真分析了电流和气隙等不同因素对尿道阀特性的影响。通过仿真和实验对比,验证了所建立模型的有效性。在模拟实验系统上,探讨了尿道阀对膀胱动力泵排尿动力特性的影响,结果表明：增大电磁铁电流、减小电磁铁与尿道阀之间的气隙,有利于提高最大尿流率、缩短尿流时间。研究结果可为膀胱动力泵的特性分析和结构优化设计提供参考。

关键词: 膀胱动力泵, 尿道阀, 尿流率, 尿流时间