医用水射流发生装置出口参数匹配设计方法  

Matching Design Method for Exit Parameters of Medical Waterjet Generating Device

作　　者：曹超[1,2] 赵继云 李桂林[3] 丁海港 康建宏[2] 韩静[1] CAO Chao;ZHAO Jiyun;LI Guilin;DING Haigang;KANG Jianhong;HAN Jing(School of Mechatronic Engineering,China University of Mining and Technology,Xuhzou 221116;School of Safety Engineering,China University of Mining and Technology,Xuhzou 221116;Xuzhou Maternal and Child Health Care Hospital,Xuzhou Medical University,Xuzhou 221000)

机构地区：[1]中国矿业大学机电工程学院,徐州221116 [2]中国矿业大学安全工程学院,徐州221116 [3]徐州医科大学附属徐州市妇幼保健院,徐州221000

出　　处：《机械工程学报》2022年第12期293-300,共8页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51175497);江苏省自然科学基金(BK20210496);河北省自然科学基金生态智慧矿山联合基金(E2020402075);江苏省自然科学基金(BK20190635);江苏高校优势学科建设工程和徐州市科技创新专项(KC16SY155)资助项目。

摘　　要：提出了用于软组织分离的医用水射流发生装置出口参数匹配设计方法,从射流动力匹配分离对象断裂性能和临床操作空间两个方面完善了射流参数的优化路径。面向软组织弹性变形特征,分析射流直径和冲击速度对冲击过程中水锤作用时间和范围的影响机制。基于微小尺度水射流的动力分布特点,建立与直径相关的射流初始段长度即临床操作时射流动力集中区间长度的计算模型。结果表明,针对力学性能不同的分离对象,在保证射流初始段长度的前提下,通过冲击速度或者压力与出口直径的组合设计能够优化临床应用效果。通过光学观测方法,以微小尺度射流发生系统试验验证了出口直径0.2mm条件下形成的射流动力集中区域能够符合临床操作需要。研究结果为医用射流发生装置分级设计和应用奠定了理论基础。An outlet parameter matching design method for a medical waterjet generator for soft tissue separation is proposed.The optimized path of the waterjet parameters is perfected from the aspects of waterjet force matching separation object fracture performance and clinical operating space.Facing the elastic deformation characteristics of soft tissue,the influence mechanism of waterjet diameter and impact velocity on the time and scope of water hammer during impact process was studied.Based on the dynamic distribution characteristics of micro-scale waterjet,a diameter-dependent initial length model of the waterjet,that is,a model for calculating the concentration length of waterjet forces in clinical operations,was established.The results show that for objects with different mechanical properties,the combination of impact speed or pressure and outlet diameter can optimize the clinical effect on the premise of ensuring the waterjet initial length.Through optical observation methods,the micro-scale waterjet generation system experiments have verified that the area of waterjet force concentration within the exit diameter of 0.2 mm can meet the operation needs.The results lay a theoretical foundation for the hierarchical design and optimization of medical waterjet generators.

关 键 词：医用水射流 水锤作用 软组织破坏 微小尺度 匹配设计 

分 类 号：TK79[动力工程及工程热物理—流体机械及工程]