北京生物医学工程

旋磨气动涡轮转子的设计及有效性分析

Design and effectiveness analysis of pneumaticturbine rotor for rotational atherectomy

作者：王常焰张劫叶萍常兆华

单位：上海理工大学医疗器械与食品学院(上海200093) 通信作者：常兆华。E-mail：m8090313@ 126. com

分类号：R318. 6

出版年·卷·期（页码）：2021·40·6（598-604）

摘要：

目的基于对高速气动涡轮理论和牙科手机中涡轮转子的研究和分析，设计并制造出了 3 种结构的旋磨气动涡轮转子，并研究这3种旋磨气动涡轮转子的转速与供气压力之间的关系，使其与目前旋磨系统中的涡轮转子相兼容。方法采用SolidWorks三维设计软件分别设计尖型、直型和凹型3种结构涡轮转子。利用ANSYS FLUENT软件对其进行压力分析，接着搭配特制的导管和磨头构成简易旋磨系统进行体外实验，通过改变供气压力使用光纤测速系统实时测得转速。结果仿真结果表明尖型和凹型涡轮转子叶片上压差明显小于直型涡轮转子(0. 15 MPa)，体外磨削实验结果显示供气压力为0. 5 MPa时3种转子转速均达到140 000 r/mino结论凹型涡轮转子的转速波动性最稳定，且转速可达现有的旋磨系统要求。

Objective Based on the research and analysis of the theory of high-speed pneumatic turbines and the turbine rotors in dental handpieces, we design and manufacture three types of rotational atherectomy pneumatic turbine rotors, and study the relationship between the rotational speed and the air supply pressure of these three types of rotational atherectomy pneumatic turbine rotors. The relationship between them makes it compatible with the turbine rotor in the current rotational atherectomy system. Methods SolidWorks three-dimensional design software is used to design the tip, straight and concave turbine rotors. We use ANSYS FLUENT software to analyze its pressure, and then use a special catheter and grinding head to form a simple rotational atherectomy system for in vitro experiments. By changing the air supply pressure, the optical fiber speed measurement system is used to measure the speed in real time. Results The simulation results show that the pressure difference between the tip and concave turbine rotor blades is significantly smaller than that of the straight turbine rotor (0.15 MPa). The in vitro grinding experimental results show that the speed of the three rotors reaches 140 000 r/min when the air supply pressure 0.5 MPa- Conclusions The rotational speed fluctuation

of the concave turbine rotor is the most stable, and the rotational speed can meet the requirements of the existing rotational grinding system.

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