【摘要】：旋流器具有體積小、分離效率高及操作維護(hù)方便等突出優(yōu)點被廣泛應(yīng)用于工業(yè)領(lǐng)域中。然而旋流器壁面磨損嚴(yán)重已制約其應(yīng)用與發(fā)展。為提高旋流器的使用壽命,本文通過數(shù)值模擬與試驗結(jié)合的方法,研究旋流器各部分磨損行為和形態(tài)以及磨損率分布。并針對性的進(jìn)行耐磨材料的沖蝕磨損試驗,尋找最優(yōu)耐磨材料組合,提高整機(jī)使用壽命。研究結(jié)果對于降低旋流器運行成本、節(jié)約材料消耗、提高其運行可靠性具有一定的現(xiàn)實意義。本文利用DPM Erosion模型分析顆粒在050mm旋流器內(nèi)部的運動軌跡及壁面磨損狀態(tài),發(fā)現(xiàn)經(jīng)螺旋運動的固體粗顆粒沉積在錐體壁面。底流口是磨損最嚴(yán)重的部位,下錐段區(qū)域磨損次之,且由錐段中間到底流口,磨損率急劇上升,磨損率為上錐段的4.5倍;入口環(huán)形空間磨損率為柱段磨損率的4倍,柱段和頂板磨損率最小。本文通過探討不同口徑底流口對整機(jī)磨損的影響,發(fā)現(xiàn)底流口經(jīng)磨損增大后會在一定程度上降低整機(jī)磨損,底流口直徑對旋流器磨損規(guī)律影響不大。根據(jù)壁面磨損率確定分段加工原則,并在實驗室進(jìn)行了磨損模擬試驗,根據(jù)實測結(jié)果計算不同部位的平均磨損率,試驗結(jié)果與數(shù)值模擬結(jié)果一致。根據(jù)旋流器壁面磨損形貌及顆粒運動軌跡可以得出,顆粒對壁面的沖擊角度不同導(dǎo)致了各部位有不同的磨損形式。結(jié)合受力分析及顆粒速度矢量,將旋流器磨損行為分為兩個區(qū)域:撞擊磨損區(qū)域和沖刷磨損區(qū)域。最后根據(jù)旋流器磨損失效形式,對7種商業(yè)用耐磨材料進(jìn)行了不同沖擊角度下的沖蝕磨損試驗,最終確定內(nèi)襯材料優(yōu)化設(shè)計原則為:入口環(huán)形區(qū)域和頂板內(nèi)襯邵A72的高分子材料;柱段、錐段和底流口區(qū)域內(nèi)襯陶瓷材料,并對整機(jī)延長使用壽命和等壽命設(shè)計提供指導(dǎo)。
[Abstract]:Hydrocyclone has been widely used in industrial field because of its small size, high separation efficiency and convenient operation and maintenance. However, wall wear of hydrocyclone has restricted its application and development. In order to improve the service life of hydrocyclone, the wear behavior, morphology and wear rate distribution of all parts of cyclone are studied by numerical simulation and experiment. In order to improve the service life of the machine, the erosion wear test of wear-resistant material is carried out to find the best wear-resistant material combination. The results are of practical significance to reduce the operation cost, save the consumption of materials and improve the reliability of the hydrocyclone. In this paper, DPM Erosion model is used to analyze the motion trajectory and wall wear state of particles in 050mm hydrocyclone. It is found that solid coarse particles with spiral motion are deposited on the wall of cone. The bottom flow is the most serious part, the lower cone is the second, and from the middle to the end of the cone, the wear rate increases sharply, and the wear rate is 4.5 times of that of the upper cone. The wear rate of the inlet ring space is 4 times of that of the column segment, and the wear rate of the column and roof is the least. In this paper, the influence of different caliber bottom flow on the wear of the whole machine is discussed. It is found that the wear of the bottom flow will be reduced to a certain extent after the increase of the wear, and the diameter of the bottom flow has little effect on the wear law of the hydrocyclone. The principle of segmental machining was determined according to the wall wear rate and the wear simulation tests were carried out in the laboratory. The average wear rates of different parts were calculated according to the measured results. The experimental results were in agreement with the numerical simulation results. According to the wall wear morphology and particle motion trajectory of the hydrocyclone, it can be concluded that the different impact angle of particles on the wall leads to different wear patterns in different parts. Combined with force analysis and particle velocity vector, the wear behavior of hydrocyclone is divided into two regions: impact wear zone and erosion wear zone. Finally, according to the wear failure form of hydrocyclone, the erosion wear tests of 7 kinds of commercial wear resistant materials are carried out at different impact angles. Finally, the optimum design principles of lining materials are determined as follows: high molecular material with Shore A72 in inlet annular area and in roof lining; Column section, conical section and bottom flow zone lining ceramic materials, and provide guidance for the whole machine to extend the service life and equal life design.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD455

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