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  本文選題：轉鼓　切入點：螺旋輸送器　出處：《中北大學》2015年碩士論文

【摘要】：臥螺離心機作為一種固液分離設備廣泛應用于煤炭、化工、醫(yī)藥、食品等領域。臥螺離心機作為一種高效的細粒煤脫水設備，能夠很好地應用于煤泥和浮選精煤的脫水。隨著臥螺離心機的應用愈加廣泛，對臥螺離心機關鍵零部件如轉鼓、螺旋輸送器結構的強度、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了臥螺離心機生產(chǎn)能力計算公式，通過對沉渣滑動動力學研究推導出螺旋輸送器的受力情況，為后續(xù)的分析研究打下基礎。在使用SolidWorks建立的三維模型的基礎上，應用有限元前處理軟件HyperMesh對轉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量的有限元模型。再使用ANSYS軟件對轉鼓和螺旋輸送器進行靜力分析、模態(tài)分析和臨界轉速的計算。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鼓和螺旋輸送器進行強度校核，驗證其強度剛度滿足使用要求； （2）研究轉鼓排渣口排渣口尺寸對應力集中系數(shù)的影響，得到應力集中系數(shù)與排渣口尺寸關系曲線； （3）研究螺旋輸送器應力強度隨轉速和軸向力的變化關系； （4）在ANSYS中使用Block Lanczos法分別對轉鼓和螺旋輸送器進行模態(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)轉子動力學理論，計算在陀螺效應下螺旋輸送器的臨界轉速，驗證設備遠離其臨界轉速，并且研究了支撐剛度對螺旋輸送器轉子系統(tǒng)臨界轉速的影響規(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.
【學位授予單位】：中北大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ051.84

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