本文選題：對旋風機 + 磁-流-固耦合分析��； 參考：《哈爾濱理工大學》2017年博士論文

【摘要】：對旋風機為高風壓雙級葉輪機械通風設備,其前后級葉輪由前后級電機單獨驅動,兩級葉輪對轉使氣流沿軸向流出。對旋風機的送風反風性能良好,近年來已被廣泛應用于礦井、隧道等變距離通風換氣場合。然而,在變距離送風條件下,對旋風機存在機電性能難以匹配、機械系統(tǒng)振動劇烈等問題。因此,深入研究對旋風機的工作機理,明確影響風機性能的關鍵因素,并對其運行情況進行有效的預測和控制,是實現(xiàn)對旋風機高精度穩(wěn)定運行的重要前提。為了更加真實地反映對旋風機電磁場與流場之間的耦合作用與相互影響,本文把電機部分和流體機械部分作為一個整體,以電磁場有限元理論和流場有限元理論為基礎,構建對旋風機磁-流耦合仿真模型,對仿真過程中的狀態(tài)變量殘差、瞬態(tài)時間步以及信息交互機制進行說明,通過采用分步回歸的求解技術,對非慣性負載下的電磁場情況和葉輪變轉速下的流場情況進行模擬,完成對旋風機異構仿真系統(tǒng)的瞬態(tài)場耦合分析過程,并在此基礎上進一步分析對旋風機機械結構的磁-固和流-固耦合特性,為全文的研究工作奠定基礎。在進行對旋風機性能研究時,將數(shù)值模擬方法與實驗測試相結合,對原型風機性能參數(shù)值進行計算,得到原型風機性能曲線。引入以電功率為輸入的對旋風機系統(tǒng)效率考核指標,對不同工況下對旋風機的運行性能進行研究。為了提高掘進初期和中期對旋風機的系統(tǒng)效率值,在雙極對數(shù)槽號相位圖的基礎上,構造具有較高繞組系數(shù)且不存在支路環(huán)流的變極繞組,詳細闡述調衡繞組變極電機的設計過程。通過改變前后兩級電機的轉速配合方式,使各級電機容量分別與不同送風距離下的兩級葉輪負載相匹配,為高性能對旋風機調速控制研究和節(jié)能控制研究提供參考。對旋風機為電磁力和氣動力協(xié)同作用的機電一體化通風設備,為了探究對旋風機運行過程中的機電匹配狀況,給出作用在兩級葉輪上的脈動力波和兩級電機氣隙電磁力波的解析計算方法和仿真計算方法。在葉柵翼型氣動力解析計算過程中,通過干涉系數(shù)考慮孤立翼型的相互作用效果,在仿真計算中,根據(jù)伯努利方程直接求解出作用在葉片表面上的氣動力。在電機電磁力解析計算過程中,以麥克斯韋定律為理論基礎研究各次徑向電磁力波的幅頻特性。在電磁力仿真計算過程中,通過合適的路徑選擇,將高精度電磁力虛位移計算法與麥克斯韋應力計算法進行等效,求解切向電磁力和徑向電磁力的時變曲線。根據(jù)計算結果,說明有限元計算方法的優(yōu)越性,并進一步得到氣動轉矩和電磁轉矩的時變曲線。借助快速傅里葉變換方法,得到低通濾波后的壓力脈動轉矩和電機電磁轉矩的主要頻率、幅值及其變化規(guī)律,對氣動轉矩和電磁轉矩存在同頻分量時出現(xiàn)的轉矩諧振現(xiàn)象進行研究。采用三維激光掃描法構造不同葉片數(shù)目的兩級葉輪模型,分析前后級葉輪葉片數(shù)目配合方式對兩級葉輪轉矩諧振情況的影響及機械振動與轉矩諧振之間的內在聯(lián)系。同時,進一步研究變工況下的前后級葉的轉矩諧振情況,據(jù)此選擇兩級葉輪葉片與兩級電動機定轉子的最優(yōu)匹配方式。為了研究由氣動力和電磁力頻率與固有頻率相同時引起的機械共振情況,通過使用RNG k-ε湍流模型模擬對旋風機內部湍流流動情況,獲得表征湍流流場特性的主要參數(shù)值,說明湍流強度與系統(tǒng)效率之間的關系。同時,對葉輪附近處的壓力脈動情況進行監(jiān)測,以輸運方程計算所得湍動能和湍流耗散率為基礎,選擇Broudband噪聲仿真計算模型,分析對旋風機各部件表面上的聲功率分布情況。研究電機電磁噪聲特性時,根據(jù)電磁力得到時域內的集中力及頻域內的實部力和虛部力,在ANSYS Mechanical中對不同轉子數(shù)目的電機定子鐵心和機殼部分進行諧響應分析,并在ANSYS Acoustic中完成電機噪聲聲壓級仿真計算過程。
[Abstract]:The cyclone machine for high pressure double impeller mechanical ventilation equipment, driving the impeller by the motor before and after stage alone, two of the impeller axial flow air flow. The anti wind performance of cyclone machine is good, in recent years has been widely used in mines, tunnels and other variable distance ventilation applications. However, in the variable distance air supply condition of cyclone machine electrical performance is difficult to match the problem of mechanical vibration system. Therefore, research on working mechanism of cyclone machine deeply, find the key factors influencing the performance of the fan, and the operation of effective forecast and control, is an important prerequisite for implementation of cyclone high precision and stable operation. In order to more accurately reflect the coupling effect between electric field and flow field of cyclone and influence each other, the motor part and fluid mechanical part as a whole, the electromagnetic field finite element theory Theory and finite element theory, the construction of fan magnetic flow coupling simulation model of state variable residuals in the simulation process, the transient time step and information interaction mechanism is described, solving technique through using step regression, the non inertia load of the electromagnetic field and flow field of the impeller with variable speed simulation analysis process of transient field coupling on heterogeneous cyclone machine simulation system, and on the basis of further analysis on the mechanical structure of solid magnetic cyclone machine and fluid solid coupling characteristics, which lays the foundation for the whole research work. In the study of cyclone machine performance, the numerical simulation method and experimental test the combination of prototype fan performance parameters were calculated by the prototype fan performance curve. With the introduction of electric power input on the system fan efficiency evaluation index, the machine on the cyclone under different conditions Research on the operation performance. In order to improve the driving efficiency of cyclone system early and middle machine value based on bipolar logarithmic slot number phase graph on the structure has higher winding coefficient and no branch circulation pole changing winding design process, regulating winding pole changing motor is introduced in this paper. By changing before and after level two the speed of motor coordination, make the motor capacity respectively matched with the load of different air distance of the two stage impeller, fan speed control to provide the reference for the research and study of energy saving control for high performance. The mechanical and electrical integration of ventilation equipment for electromagnetic fan and aerodynamic forces of synergy, in order to explore the matching situation of electromechanical cyclone in the process of operation, calculation methods and simulation analysis are fluctuating force in the two stage and two stage impeller on the wave motor air gap electromagnetic force wave in cascade aerodynamic. The analytical calculation of the process, the interference coefficient considering the interaction effect of isolated airfoils, in numerical simulation, according to the Bernoulli equation is obtained in the blade aerodynamic surface. In the analysis of the electromagnetic force in the process of calculation, the Maxwell amplitude frequency characteristics of law as the theoretical basis of the radial electromagnetic force wave the electromagnetic force. In the simulation process, through appropriate path selection, calculation method and the Maxwell stress calculation method of equivalent electromagnetic force will move high precision virtual curved line for tangential electromagnetic force and radial electromagnetic force. According to the calculation results, illustrate the superiority of the finite element calculation method, and further gas dynamic torque and torque curves. By fast Fourier transform method, the main frequency of low-pass filter, pressure pulsation of torque and motor torque, and the change of amplitude The law, to study the torque resonance phenomena of pneumatic torque and torque has the same frequency component. The two stage impeller model constructed by 3D laser scanning method with different number of blades, the intrinsic link between the analysis before and after class with the number of impeller blades on the impact of the two stage impeller torque resonance and mechanical vibration and torque resonance at the same time, the further research of torque resonant stage under variable conditions leaves, optimal select two stage impeller blades and two motor stator and rotor matching. In order to study the mechanical resonance by the aerodynamic force and the electromagnetic force frequency and natural frequency caused by the phase at the same time, by using the RNG k- turbulence model to simulate the the internal turbulent flow cyclone machine, the main parameter characterization of flow field characteristics of turbulence, illustrate the relationship between turbulence intensity and efficiency of the system. At the same time, near the impeller Monitoring the pressure fluctuations of the transport equation to calculate turbulent kinetic energy and turbulent dissipation rate as the basis, select the Broudband noise model, analysis of the acoustic power distribution of each component on the surface of the cyclone machine. Research on electromagnetic noise characteristics of the motor, according to the electric magnetic force and get concentrated in frequency domain the real part and imaginary force force of motor stator core and shell of different parts of the rotor in the ANSYS Mechanical in the number of harmonic response analysis, and complete the motor noise sound pressure level simulation in ANSYS Acoustic in the calculation process.

【學位授予單位】：哈爾濱理工大學
【學位級別】：博士
【學位授予年份】：2017
【分類號】：TH43

【參考文獻】

相關期刊論文 前8條

1 梁齊文;楊波;;進口速度畸變對軸流風機性能影響的全周數(shù)值研究[J];流體機械;2014年12期

2 曾華;馮浩;趙浩;;有刷直流電機振動轉矩的解析與實驗研究[J];輕工機械;2014年01期

3 李春曦;尹攀;葉學民;;單動葉安裝角深度異常對軸流風機性能及噪聲影響的數(shù)值模擬[J];中國電機工程學報;2012年35期

4 崔淑梅;于天達;宋立偉;;基于ANSYS和SYSNOISE的電機噪聲仿真分析方法[J];電機與控制學報;2011年09期

5 陳慶光;房菲;張振東;賈祥省;;對旋風機葉輪內部流場的壓力脈動分析[J];山東科技大學學報(自然科學版);2011年02期

6 鮑曉華,王群京,劉磊;交流電機繞組的諧波分析與噪聲計算[J];合肥工業(yè)大學學報(自然科學版);2004年10期

7 李秋實,陸亞鈞,李玲;對旋軸流風機的穩(wěn)態(tài)流場數(shù)值模擬[J];北京航空航天大學學報;2002年05期

8 朱巍,李秋實,范洪濤,陸亞鈞;對旋風機對旋葉輪級間流場的實驗研究[J];航空動力學報;2001年02期

，

本文編號：1747452