發(fā)布時(shí)間：2019-03-14 17:09

【摘要】：旋轉(zhuǎn)閃蒸干燥機(jī)是一種利用熱空氣與物料相互接觸以熱交換形式對(duì)物料進(jìn)行干燥的對(duì)流干燥機(jī),它具有結(jié)構(gòu)緊湊,干燥強(qiáng)度高,能耗低,生產(chǎn)效率高,操作維修簡(jiǎn)便等優(yōu)點(diǎn)。主軸旋轉(zhuǎn)機(jī)構(gòu)是粉碎物料主要裝置,其主要在高轉(zhuǎn)速、高溫環(huán)境工作,所以要對(duì)旋轉(zhuǎn)機(jī)構(gòu)進(jìn)行動(dòng)力學(xué)分析以及靜力學(xué)分析,判斷旋轉(zhuǎn)機(jī)構(gòu)結(jié)構(gòu)強(qiáng)度是否滿足設(shè)計(jì)要求。本文主要通過有限元分析方法對(duì)旋轉(zhuǎn)機(jī)構(gòu)進(jìn)行靜力學(xué)及動(dòng)力學(xué)分析�？紤]陀螺效應(yīng),通過偽模態(tài)法得出轉(zhuǎn)子系統(tǒng)Campbell圖并計(jì)算其臨界轉(zhuǎn)速,考慮軸承支撐剛度對(duì)轉(zhuǎn)子系統(tǒng)臨界轉(zhuǎn)速的影響。本文通過幅頻響應(yīng)曲線分析轉(zhuǎn)子系統(tǒng)激勵(lì)響應(yīng),分析轉(zhuǎn)子系統(tǒng)瞬態(tài)不平衡響應(yīng),改變轉(zhuǎn)子系統(tǒng)啟動(dòng)加速度觀察對(duì)振動(dòng)響應(yīng)的影響。通過Fluent仿真分析得出流場(chǎng)物理參數(shù),并將分析結(jié)果導(dǎo)入Workbench穩(wěn)態(tài)熱分析及靜力學(xué)分析中求出結(jié)構(gòu)熱響應(yīng)及結(jié)構(gòu)響應(yīng),并校核其靜強(qiáng)度是否滿足設(shè)計(jì)要求。并將靜力學(xué)分析結(jié)果作為預(yù)應(yīng)力導(dǎo)入模態(tài)分析中,分析旋轉(zhuǎn)機(jī)構(gòu)固有振型及頻率。提出改進(jìn)設(shè)計(jì)方案,觀察其對(duì)結(jié)構(gòu)強(qiáng)度影響。
[Abstract]:Rotary flash dryer is a convection dryer which uses hot air and material to dry the material in the form of heat exchange. It has the advantages of compact structure, high drying intensity, low energy consumption, high production efficiency, easy operation and maintenance, etc. It has the advantages of compact structure, high drying intensity, low energy consumption, high production efficiency and easy operation and maintenance. The spindle rotating mechanism is the main device for crushing materials, which works in high speed and high temperature environment. Therefore, the dynamic analysis and statics analysis of the rotating mechanism should be carried out to determine whether the structural strength of the rotating mechanism meets the design requirements. In this paper, the statics and dynamics of rotating mechanism are analyzed by finite element method. Considering gyro effect, the Campbell diagram of rotor system is obtained by pseudo-mode method, and the critical speed of rotor system is calculated. The effect of bearing support stiffness on critical speed of rotor system is considered. In this paper, the amplitude-frequency response curve is used to analyze the excitation response of the rotor system, the transient unbalanced response of the rotor system is analyzed, and the influence of the starting acceleration of the rotor system on the vibration response is changed. The physical parameters of the flow field are obtained by Fluent simulation, and the thermal response and structural response of the structure are obtained by Workbench steady-state thermal analysis and statics analysis, and the static strength of the structure is checked to meet the design requirements. The statics analysis results are taken as prestressing force into the modal analysis to analyze the natural vibration modes and frequencies of the rotating mechanism. An improved design scheme is put forward to observe the influence of the design on the structural strength.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TB4

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本文編號(hào)：2440182