本文選題：刮板輸送機(jī)　切入點(diǎn)：齒輪箱箱體　出處：《太原理工大學(xué)》2017年碩士論文

【摘要】：刮板輸送機(jī)作為煤機(jī)綜采裝備重要組成之一,其工作性能、使用壽命等因素直接影響著煤礦高效生產(chǎn)。應(yīng)用于刮板輸送機(jī)驅(qū)動環(huán)節(jié)中的可控啟動裝置(controlled start transmission),具有空載啟動、卡鏈保護(hù)和軟啟動等功能,解決了刮板輸送機(jī)啟動困難、沖擊載荷大等問題。箱體作為CST主要支撐和減振部件,力學(xué)特性的好壞直接影響CST的技術(shù)性能和使用壽命。因此,有必要對CST齒輪箱箱體進(jìn)行有限元分析。首先,通過網(wǎng)格劃分、設(shè)置邊界條件建立箱體有限元模型。同時,基于多體動力學(xué)理論,利用Adams軟件建立CST齒輪傳動系統(tǒng)虛擬樣機(jī)模型并進(jìn)行動力學(xué)仿真,獲得了箱體各軸承座處的支反力,作為后續(xù)箱體的靜、動力學(xué)分析的載荷數(shù)據(jù)。其次,基于有限元分析理論,對所建箱體模型進(jìn)行靜力學(xué)分析,得到最大輸出扭矩工況下箱體最大應(yīng)力61.86MPa、位移0.14mm,小于箱體許用抗拉強(qiáng)度,表明箱體具有足夠的強(qiáng)度。此外,對箱體展開模態(tài)分析,獲得前30階自由模態(tài)和約束模態(tài)固有頻率,確定了箱體共振下易發(fā)生疲勞破壞的部位;對箱體進(jìn)行瞬態(tài)動力學(xué)仿真,得到動態(tài)應(yīng)力曲線,其均值與靜力學(xué)分析結(jié)果接近,波動趨勢與負(fù)載變化一致。最后,搭建了CST齒輪箱動態(tài)特性試驗(yàn)臺,并測量額定工況下箱體的應(yīng)力和振動加速度數(shù)據(jù),得到了箱體振動和動態(tài)響應(yīng)特性,將應(yīng)力仿真結(jié)果與試驗(yàn)數(shù)據(jù)、箱體固有頻率和箱體振動頻率進(jìn)行對比分析。結(jié)果表明,所建箱體有限元模型能準(zhǔn)確的表現(xiàn)出箱體的受力情況,同時可以較好的反映齒輪箱的動態(tài)特性,可為齒輪箱的工程實(shí)際應(yīng)用提供一定的依據(jù)。
[Abstract]:As one of the important components of fully mechanized coal mining equipment, scraper conveyer has a direct impact on the high efficiency production of coal mine, such as its working performance and service life. The functions of chain protection and soft start solve the problems of scraper conveyor such as difficult starting and large impact load. As the main support and damping component of CST, the mechanical properties of the box directly affect the technical performance and service life of CST. It is necessary to analyze the CST gearbox box by finite element method. Firstly, the finite element model of the CST gearbox box is established by meshing and the boundary conditions are set up. At the same time, based on the theory of multi-body dynamics, The virtual prototype model of CST gear transmission system is established by using Adams software, and the dynamic simulation is carried out, and the supporting reaction force at each bearing seat of the box is obtained as the load data of the static and dynamic analysis of the subsequent box body. Secondly, based on the finite element analysis theory, the dynamic and static load data of the box are obtained. By static analysis of the model, the maximum stress of the box under maximum output torque is 61.86 MPa and the displacement is 0.14 mm, which is less than the allowable tensile strength of the box, which indicates that the box has sufficient strength. In addition, the modal analysis of the box is carried out. The natural frequencies of the first 30 free modes and constrained modes are obtained, and the position of fatigue failure is determined under the box resonance. The dynamic stress curve is obtained by the transient dynamic simulation of the box, and the mean value is close to that of the static analysis. The fluctuation trend is consistent with the load change. Finally, the dynamic characteristic test bed of CST gearbox is built, and the stress and vibration acceleration data of the box under rated working condition are measured, and the vibration and dynamic response characteristics of the box are obtained. The stress simulation results are compared with the experimental data, the natural frequency and vibration frequency of the box. The results show that the finite element model of the box body can accurately show the stress situation of the box body. At the same time, it can better reflect the dynamic characteristics of the gearbox, and provide a certain basis for the engineering application of the gearbox.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD528.3

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