本文選題：行星齒輪減速系統(tǒng)　切入點：骨鉆　出處：《齊魯工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：行星齒輪傳動系統(tǒng)具有結(jié)構(gòu)緊湊、承載能力大的特性,在汽車、船舶、風(fēng)電設(shè)備中廣泛應(yīng)用。在醫(yī)用小型槍式骨鉆中,行星齒輪傳動系統(tǒng)屬于關(guān)鍵的減速和增加扭矩的功能部分,其性能對于骨鉆的整體性能至關(guān)重要。行星齒輪傳動系統(tǒng)動力學(xué)特性復(fù)雜,振動和噪聲是影響系統(tǒng)性能和壽命的重要因素,同時對于醫(yī)用設(shè)備來講,其振動和噪聲也對醫(yī)生和患者的影響更加明顯,直接影響到手術(shù)的質(zhì)量。針對骨鉆行星傳動系統(tǒng)的實際工況特點,研究行星齒輪傳動系統(tǒng)的動態(tài)性能,預(yù)測齒輪嚙合激勵對系統(tǒng)噪聲的貢獻量,有利于突破高端行星齒輪減速裝置的核心技術(shù),減少高端設(shè)備的進口依賴,推動我國醫(yī)用骨鉆設(shè)備的設(shè)計制造的長足發(fā)展。本文以醫(yī)用骨科電鉆的行星減速部分為研究對象,圍繞行星齒輪傳動系統(tǒng)的振動噪聲產(chǎn)生機理展開研究,結(jié)合行星傳動系統(tǒng)動力學(xué)仿真、骨鉆箱體模態(tài)分析、骨鉆箱體聲學(xué)有限元和聲學(xué)邊界元分析方法指導(dǎo)減速機箱體結(jié)構(gòu)振動噪聲的控制,主要以減少振動、降低噪聲、改善骨鉆動力學(xué)性能為重點,從而達到減少振動、降低噪聲、改善骨鉆動力學(xué)性能目的。本研究主要做了以下工作：對骨鉆行星齒輪傳動的傳動機理進行了分析,并結(jié)合齒輪系統(tǒng)動力學(xué)基本理論對骨鉆噪聲產(chǎn)生機理進行了分析；對骨鉆行星齒輪傳動部分主要部件進行了三維建模；建立起了骨鉆行星傳動系統(tǒng)的虛擬樣機模型,分析求解了額定工況下骨鉆箱體振動噪聲的主要激勵；對骨鉆箱體進行了模態(tài)分析并對主要振型做了相關(guān)描述；基于動力學(xué)仿真以及模態(tài)分析結(jié)果,對額定工況下骨鉆箱體結(jié)構(gòu)表面振動的響應(yīng)進行求解；分別利用聲學(xué)有限元和聲學(xué)邊界元法結(jié)合骨鉆箱體表面振動結(jié)果對骨鉆箱體進行結(jié)構(gòu)噪聲預(yù)測,并提取和分析了場點處的聲壓頻率圖譜,獲得了聲學(xué)模態(tài)貢獻圖譜,確定了對聲壓貢獻較大的模態(tài)階數(shù),在此基礎(chǔ)上制定了骨鉆箱體結(jié)構(gòu)噪聲控制方案,并對相關(guān)方案進行了仿真分析。
[Abstract]:The planetary gear transmission system is widely used in automobile, ship and wind power equipment because of its compact structure and high bearing capacity. Planetary gear transmission system belongs to the key function of reducing speed and increasing torque, and its performance is very important to the overall performance of bone drill. Vibration and noise are important factors that affect the performance and life of the system. At the same time, for medical equipment, the effects of vibration and noise on doctors and patients are more obvious. According to the actual operating conditions of the planetary transmission system of bone drill, the dynamic performance of the planetary gear transmission system is studied, and the contribution of gear meshing excitation to the system noise is predicted. It is helpful to break through the core technology of the high-end planetary gear deceleration device, reduce the import dependence of the high-end equipment, and promote the rapid development of the design and manufacture of the medical bone drill equipment in China. This paper takes the planetary deceleration part of the medical orthopedic electric drill as the research object. The mechanism of vibration and noise generation of planetary gear transmission system is studied. Combined with the dynamic simulation of planetary transmission system, the modal analysis of bone drill box is carried out. The acoustic finite element method and acoustic boundary element analysis method of bone drill box are used to guide the vibration and noise control of reducer box structure. The emphasis is mainly on reducing vibration, reducing noise and improving the dynamic performance of bone drill so as to reduce vibration and noise. The purpose of this study is to improve the dynamic performance of bone drill. The main work of this study is as follows: the transmission mechanism of bone drill planetary gear transmission is analyzed, and the mechanism of bone drill noise generation is analyzed based on the basic theory of gear system dynamics; The 3D modeling of the main parts of the bone drill planetary gear transmission is carried out, and the virtual prototype model of the bone drill planetary transmission system is established, and the main vibration and noise excitation of the bone drill box under rated working conditions is analyzed and solved. Based on the dynamic simulation and modal analysis results, the response of the surface vibration of the bone drill box under rated conditions is solved. The acoustic finite element method and the acoustic boundary element method are used to predict the structural noise of the bone drill box, and the frequency spectrum of sound pressure at the field point is extracted and analyzed, and the acoustic modal contribution map is obtained. The modal order which contributes a lot to the sound pressure is determined. On the basis of this, the noise control scheme of the bone drill box is established, and the related scheme is simulated and analyzed.
【學(xué)位授予單位】：齊魯工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TH132.425

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