北京生物醫(yī)學(xué)工程

旋磨氣動(dòng)渦輪轉(zhuǎn)子的設(shè)計(jì)及有效性分析

Design and effectiveness analysis of pneumaticturbine rotor for rotational atherectomy

作者：王常焰張劫葉萍常兆華

單位：上海理工大學(xué)醫(yī)療器械與食品學(xué)院(上海200093) 通信作者：常兆華。E-mail：m8090313@ 126. com

關(guān)鍵詞：旋磨術(shù);渦輪轉(zhuǎn)子;ANSYS FLUENT；磨削轉(zhuǎn)速;動(dòng)力性能

分類(lèi)號(hào)：R318. 6

出版年·卷·期（頁(yè)碼）：2021·40·6（598-604）

摘要：

目的基于對(duì)高速氣動(dòng)渦輪理論和牙科手機(jī)中渦輪轉(zhuǎn)子的研究和分析，設(shè)計(jì)并制造出了 3 種結(jié)構(gòu)的旋磨氣動(dòng)渦輪轉(zhuǎn)子，并研究這3種旋磨氣動(dòng)渦輪轉(zhuǎn)子的轉(zhuǎn)速與供氣壓力之間的關(guān)系，使其與目前旋磨系統(tǒng)中的渦輪轉(zhuǎn)子相兼容。方法采用SolidWorks三維設(shè)計(jì)軟件分別設(shè)計(jì)尖型、直型和凹型3種結(jié)構(gòu)渦輪轉(zhuǎn)子。利用ANSYS FLUENT軟件對(duì)其進(jìn)行壓力分析，接著搭配特制的導(dǎo)管和磨頭構(gòu)成簡(jiǎn)易旋磨系統(tǒng)進(jìn)行體外實(shí)驗(yàn)，通過(guò)改變供氣壓力使用光纖測(cè)速系統(tǒng)實(shí)時(shí)測(cè)得轉(zhuǎn)速。結(jié)果仿真結(jié)果表明尖型和凹型渦輪轉(zhuǎn)子葉片上壓差明顯小于直型渦輪轉(zhuǎn)子(0. 15 MPa)，體外磨削實(shí)驗(yàn)結(jié)果顯示供氣壓力為0. 5 MPa時(shí)3種轉(zhuǎn)子轉(zhuǎn)速均達(dá)到140 000 r/mino結(jié)論凹型渦輪轉(zhuǎn)子的轉(zhuǎn)速波動(dòng)性最穩(wěn)定，且轉(zhuǎn)速可達(dá)現(xiàn)有的旋磨系統(tǒng)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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