本文選題：轉(zhuǎn)鼓　切入點(diǎn)：螺旋輸送器　出處：《中北大學(xué)》2015年碩士論文

【摘要】：臥螺離心機(jī)作為一種固液分離設(shè)備廣泛應(yīng)用于煤炭、化工、醫(yī)藥、食品等領(lǐng)域。臥螺離心機(jī)作為一種高效的細(xì)粒煤脫水設(shè)備，能夠很好地應(yīng)用于煤泥和浮選精煤的脫水。隨著臥螺離心機(jī)的應(yīng)用愈加廣泛，對臥螺離心機(jī)關(guān)鍵零部件如轉(zhuǎn)鼓、螺旋輸送器結(jié)構(gòu)的強(qiáng)度、變形和振動等問題的研究的需求就更加迫切。 本文通過對離心分離理論的研究推導(dǎo)了臥螺離心機(jī)生產(chǎn)能力計(jì)算公式，通過對沉渣滑動動力學(xué)研究推導(dǎo)出螺旋輸送器的受力情況，為后續(xù)的分析研究打下基礎(chǔ)。在使用SolidWorks建立的三維模型的基礎(chǔ)上，應(yīng)用有限元前處理軟件HyperMesh對轉(zhuǎn)鼓和螺旋輸送器劃分六面體網(wǎng)格并施加邊界條件和載荷得到較高質(zhì)量的有限元模型。再使用ANSYS軟件對轉(zhuǎn)鼓和螺旋輸送器進(jìn)行靜力分析、模態(tài)分析和臨界轉(zhuǎn)速的計(jì)算。主要研究包括以下幾個方面： （1）根據(jù)靜力分析在不同工況下對轉(zhuǎn)鼓和螺旋輸送器進(jìn)行強(qiáng)度校核，驗(yàn)證其強(qiáng)度剛度滿足使用要求； （2）研究轉(zhuǎn)鼓排渣口排渣口尺寸對應(yīng)力集中系數(shù)的影響，得到應(yīng)力集中系數(shù)與排渣口尺寸關(guān)系曲線； （3）研究螺旋輸送器應(yīng)力強(qiáng)度隨轉(zhuǎn)速和軸向力的變化關(guān)系； （4）在ANSYS中使用Block Lanczos法分別對轉(zhuǎn)鼓和螺旋輸送器進(jìn)行模態(tài)分析，得到分別在有、無離心力場作用下的固有頻率和振型； （5）根據(jù)轉(zhuǎn)子動力學(xué)理論，計(jì)算在陀螺效應(yīng)下螺旋輸送器的臨界轉(zhuǎn)速，驗(yàn)證設(shè)備遠(yuǎn)離其臨界轉(zhuǎn)速，并且研究了支撐剛度對螺旋輸送器轉(zhuǎn)子系統(tǒng)臨界轉(zhuǎn)速的影響規(guī)律。
[Abstract]:As a solid-liquid separation equipment, horizontal spiral centrifuge is widely used in the fields of coal, chemical industry, medicine, food and so on. It can be used well in dewatering of coal slime and flotation concentrate coal. With the increasing application of horizontal screw centrifuge, the strength of the key parts of horizontal screw centrifuge such as drum, screw conveyor structure, The study of deformation and vibration is more urgent. In this paper, through the study of centrifugal separation theory, the calculation formula of horizontal screw centrifuge's production capacity is derived, and the force condition of screw conveyor is deduced by studying the sliding dynamics of sediment. In order to lay the foundation for the subsequent analysis. On the basis of the three-dimensional model built with SolidWorks, The finite element pre-processing software HyperMesh is used to divide the hexahedron mesh between the drum and the helical conveyer, and the finite element model with high quality is obtained by applying boundary conditions and loads. The static analysis of the drum and the helical conveyer is carried out by using the ANSYS software. Modal analysis and calculation of critical speed. The main research includes the following aspects:. 1) according to the static analysis, the strength of the drum and the screw conveyor are checked under different working conditions to verify that the strength and stiffness of the drum meet the requirements of use. 2) the influence of slag discharge size on stress concentration factor is studied, and the relationship curve between stress concentration factor and slag discharge size is obtained. 3) the relationship between the stress intensity and the rotational speed and axial force of the screw conveyer is studied. (4) using Block Lanczos method in ANSYS, the modal analysis of drum and helical conveyer is carried out, and the natural frequency and mode shape are obtained respectively under the action of no centrifugal force field. According to the rotor dynamics theory, the critical speed of the screw conveyor under the gyroscope effect is calculated, the critical speed of the equipment far from the critical speed is verified, and the influence of the supporting stiffness on the critical speed of the rotor system of the screw conveyor is studied.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ051.84

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