本文選題：雙齒輥破碎機(jī) + 離散元方法�。� 參考：《吉林大學(xué)》2017年碩士論文

【摘要】：雙齒輥破碎機(jī)是一種重要的礦山機(jī)械,與其他破碎設(shè)備相比,具有功耗低,生產(chǎn)率高、排料粒度均勻等突出優(yōu)勢,符合機(jī)械產(chǎn)品節(jié)能高效的發(fā)展方向。為使雙齒輥破碎機(jī)結(jié)構(gòu)參數(shù)與工作參數(shù)更加合理,就必須對現(xiàn)有設(shè)備進(jìn)行持續(xù)的改進(jìn)與優(yōu)化。雙齒輥破碎機(jī)等大型礦山機(jī)械設(shè)備的傳統(tǒng)研發(fā)與優(yōu)化需要在實(shí)物樣機(jī)上進(jìn)行大量試驗(yàn),不僅需要耗費(fèi)大量人力物力,而且時(shí)效性低。離散元法是一種新型的數(shù)值模擬方法,將基于離散元法的工程應(yīng)用仿真軟件EDEM應(yīng)用于雙齒輥破碎機(jī)等機(jī)械產(chǎn)品的優(yōu)化與研發(fā),可以有效減少研發(fā)成本和時(shí)間,對實(shí)現(xiàn)機(jī)械產(chǎn)品結(jié)構(gòu)優(yōu)化和工作性能改進(jìn)具有重要意義。本文通過查閱國內(nèi)外相關(guān)文獻(xiàn),論述了離散元法在雙齒輥破碎機(jī)研究領(lǐng)域中的應(yīng)用,介紹了雙齒輥破碎機(jī)的研究背景及國內(nèi)外應(yīng)用現(xiàn)狀、主要結(jié)構(gòu)以及破碎原理,分析了雙齒輥破碎機(jī)生產(chǎn)能力和有用功率等性能參數(shù)的計(jì)算方法。本文重點(diǎn)研究了雙齒輥破碎機(jī)的結(jié)構(gòu)參數(shù)和工作參數(shù)對其工作性能的影響,并應(yīng)用離散元和有限元耦合的方法對齒輥的強(qiáng)度和磨損規(guī)律進(jìn)行了研究,為雙齒輥破碎機(jī)的結(jié)構(gòu)優(yōu)化提供了參考。利用離散元法,建立雙齒輥破碎機(jī)仿真模型,并選取齒輥轉(zhuǎn)速、齒輥間距和齒牙螺旋角為變量建立離散元仿真組。分別提取了仿真過程中雙齒輥破碎機(jī)的生產(chǎn)能力、有用功率和物料顆粒的運(yùn)動(dòng)受力情況,且有用功率的仿真結(jié)果與理論公式計(jì)算結(jié)果之間的差別在合理范圍之內(nèi),從而驗(yàn)證了仿真結(jié)果的正確性。總結(jié)了齒輥轉(zhuǎn)速、齒牙螺旋角以及齒輥間距對產(chǎn)量、能耗和產(chǎn)品粒度的影響規(guī)律,確定了一定齒輥轉(zhuǎn)速范圍內(nèi)的雙齒輥破碎機(jī)齒牙螺旋角和齒輥間距的最佳值。基于EDEM-Workbench耦合方法對雙齒輥破碎機(jī)齒輥的應(yīng)力和變形情況進(jìn)行了研究,得出了相應(yīng)的應(yīng)力分布及位移數(shù)據(jù),為雙齒輥破碎機(jī)齒環(huán)和齒牙的優(yōu)化提供了參考。并通過分析齒輥能量積累分布云圖,總結(jié)出齒牙頂部和齒牙側(cè)面接近齒尖處兩個(gè)位置發(fā)生磨損的主要原因是法向磨損,而齒牙側(cè)面發(fā)生磨損的主要原因是切向磨損。本文通過對不同的結(jié)構(gòu)參數(shù)與工作參數(shù)的雙齒輥破碎機(jī)的仿真分析,得到了雙齒輥破碎機(jī)工作和結(jié)構(gòu)參數(shù)對其破碎效果的影響;并基于離散元與有限元耦合的方法初步探究了雙齒輥破碎機(jī)的磨損規(guī)律,對提高雙齒輥破碎機(jī)的生產(chǎn)效益和經(jīng)濟(jì)效益都具有積極的促進(jìn)作用。
[Abstract]:Double-toothed roller crusher is an important mining machinery. Compared with other crushing equipment, it has the advantages of low power consumption, high productivity, uniform grain size and so on, which is in line with the development direction of energy saving and high efficiency of mechanical products. In order to make the structural parameters and working parameters more reasonable, the existing equipment must be continuously improved and optimized. The traditional research and development and optimization of large mining machinery such as double-toothed roller crusher need a large number of experiments on the physical prototype, which not only need a lot of manpower and material resources, but also have low timeliness. The discrete element method is a new numerical simulation method. Applying the engineering application simulation software EDEM based on the discrete element method to the optimization and development of mechanical products such as double-tooth roller crusher can effectively reduce the cost and time of research and development. It is of great significance to realize the structure optimization and performance improvement of mechanical products. In this paper, the application of discrete element method in the research field of double tooth roller crusher is discussed by consulting relevant documents at home and abroad. The research background, application status, main structure and crushing principle of double tooth roller crusher are introduced. The calculation method of performance parameters such as productive capacity and useful power of double tooth roller crusher is analyzed. In this paper, the influence of the structure parameters and working parameters of the double-tooth roller crusher on its working performance is mainly studied, and the strength and wear law of the tooth roller are studied by using the coupling method of discrete element and finite element. It provides a reference for the structure optimization of double tooth roller crusher. The simulation model of double-tooth roller crusher was established by using discrete element method, and the discrete element simulation group was established by selecting the rotation speed of tooth roll, the distance between tooth rollers and the spiral angle of tooth teeth as variables. The productive capacity, the useful power and the moving force of the material particle are extracted respectively during the simulation process, and the difference between the simulation results of the useful power and the calculation results of the theoretical formula is within a reasonable range. The correctness of the simulation results is verified. The effects of the rotation speed of the tooth roller, the spiral angle of the tooth tooth tooth and the distance between the teeth rollers on the output, energy consumption and product granularity are summarized. The optimum values of the tooth spiral angle and the tooth roll spacing of the double-tooth roller crusher in a certain range of rotational speed of the tooth roll are determined. Based on the EDEM-Workbench coupling method, the stress and deformation of the tooth roller of the double tooth roller crusher are studied, and the corresponding stress distribution and displacement data are obtained, which provides a reference for the optimization of the tooth ring and tooth tooth of the double tooth roller crusher. By analyzing the energy accumulation and distribution of tooth roller, it is concluded that normal wear is the main cause of wear at the top and side of tooth near the cusp, and tangential wear is the main cause of wear on the side of tooth. Through the simulation analysis of the double-tooth roller crusher with different structure parameters and working parameters, the influence of the working and structure parameters of the double-tooth roller crusher on its crushing effect is obtained. Based on the coupling method of discrete element and finite element, the wear law of double-tooth roller crusher is preliminarily explored, which can promote the production benefit and economic benefit of double-tooth roller crusher.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD451

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