本文關(guān)鍵詞：小型離心風(fēng)機(jī)機(jī)械振動(dòng)分析及實(shí)驗(yàn)研究　出處：《華中科技大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 小型離心風(fēng)機(jī) 葉輪結(jié)構(gòu)優(yōu)化 蝸殼結(jié)構(gòu)分析 彈性支撐振動(dòng)響應(yīng)分析

【摘要】：振動(dòng)是衡量離心風(fēng)機(jī)運(yùn)行好壞的重要指標(biāo)之一。離心風(fēng)機(jī)的振動(dòng)和動(dòng)力學(xué)問題成為了關(guān)系到企業(yè)正常生產(chǎn)和設(shè)備安全的關(guān)鍵技術(shù)。風(fēng)機(jī)葉輪和蝸殼作為風(fēng)機(jī)的主要部件,其性能對風(fēng)機(jī)效率有極大的影響,是風(fēng)機(jī)運(yùn)行時(shí)振動(dòng)和噪聲的主要來源,因此,對其振動(dòng)特性進(jìn)行研究非常必要。 離心風(fēng)機(jī)葉輪是風(fēng)機(jī)能量轉(zhuǎn)換的核心部件,葉輪的好壞直接影響到風(fēng)機(jī)的安全系數(shù)。本文利用ANSYS軟件對葉輪進(jìn)行了強(qiáng)度計(jì)算和模態(tài)分析,并結(jié)合實(shí)際實(shí)驗(yàn)和反復(fù)的試算,提出了葉輪的設(shè)計(jì)優(yōu)化方案,優(yōu)化葉輪無論從加工性能和力學(xué)性能方面講,都比現(xiàn)用葉輪更具優(yōu)勢。 蝸殼是風(fēng)機(jī)振動(dòng)產(chǎn)生的主要部位之一。本文對蝸殼的固有頻率進(jìn)行了模擬計(jì)算,并探討了蝸殼不同部位壁厚的改變對其固有頻率的影響,提出了蝸殼的優(yōu)化方案,使其固有頻率遠(yuǎn)離風(fēng)機(jī)系統(tǒng)的基頻及其倍頻。 葉輪不平衡產(chǎn)生的偏心力是引起離心風(fēng)機(jī)振動(dòng)的重要原因之一。本文利用ANSYS有限元分析軟件對風(fēng)機(jī)支撐底座進(jìn)行了模態(tài)分析,求出了支撐底座的固有頻率;然后在支撐底座模態(tài)分析的基礎(chǔ)上分析了其在葉輪偏心力作用下的動(dòng)態(tài)響應(yīng)特性;并探尋了在不同的減振器剛度和不用的減振器布置方式下,支撐底座的動(dòng)態(tài)響應(yīng)變化規(guī)律,得到了現(xiàn)有支撐底座尺寸下最合適的減振器剛度以及現(xiàn)有減振器剛度下最優(yōu)的減振器布置范圍,對后續(xù)的風(fēng)機(jī)支撐底座結(jié)構(gòu)優(yōu)化有很好的指導(dǎo)作用。
[Abstract]:Vibration is one of the important indexes to evaluate the operation of centrifugal fan. The vibration and dynamics of centrifugal fan have become the key technology related to the normal production and equipment safety of the enterprise. The fan impeller and volute are the main fans. I need parts. Its performance has great influence on fan efficiency and is the main source of vibration and noise in fan operation. Therefore, it is very necessary to study its vibration characteristics. Centrifugal fan impeller is the core component of fan energy conversion, and the impeller directly affects the safety factor of fan. The strength calculation and modal analysis of impeller are carried out by using ANSYS software. Combined with practical experiments and repeated trial and calculation, the design optimization scheme of impeller is put forward. The optimization of impeller is superior to that of current impeller in terms of processing performance and mechanical property. Volute is one of the main parts of fan vibration. In this paper, the natural frequency of volute is simulated and calculated, and the influence of different wall thickness of volute on its natural frequency is discussed. The optimization scheme of volute case is put forward to keep its natural frequency away from the basic frequency and double frequency of fan system. The eccentric force caused by impeller unbalance is one of the important causes of centrifugal fan vibration. In this paper, the modal analysis of fan supporting base is carried out by using ANSYS finite element analysis software. The natural frequency of the supporting base is obtained. Based on the modal analysis of the supporting base, the dynamic response characteristics under the eccentric force of the impeller are analyzed. The dynamic response of the supporting base is studied under the different stiffness of the shock absorber and the arrangement of the vibration absorber. The optimum shock absorber stiffness under the existing supporting base size and the optimal shock absorber layout range under the existing shock absorber stiffness are obtained, which can be used as a good guide for the subsequent structural optimization of the fan support base.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH432;TB535

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 汪光陽;周義蓮;;風(fēng)機(jī)振動(dòng)故障診斷綜述[J];安徽工業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版);2006年01期

2 王占麗;;頻譜分析技術(shù)在實(shí)際中的應(yīng)用[J];黑龍江科技信息;2009年27期

3 時(shí)公賀;梁崗;;基于SolidWorks和ANSYS的大型全回轉(zhuǎn)架梁起重機(jī)結(jié)構(gòu)強(qiáng)度分析[J];計(jì)算機(jī)輔助工程;2009年01期

4 劉宗政;陳懇;陳振華;陳雁;黃元林;;滾動(dòng)軸承的振動(dòng)特性分析及典型故障診斷[J];機(jī)械設(shè)計(jì)與制造;2009年03期

5 黃家良;邵萬珍;;YOCQ550調(diào)速型液力偶合器葉輪強(qiáng)度的有限元分析[J];機(jī)械工程師;2008年11期

6 張學(xué)玲,徐燕申,鐘偉泓;基于有限元分析的數(shù)控機(jī)床床身結(jié)構(gòu)動(dòng)態(tài)優(yōu)化設(shè)計(jì)方法研究[J];機(jī)械強(qiáng)度;2005年03期

7 李意民,史宏超;通風(fēng)機(jī)的氣動(dòng)及耦合噪聲研究[J];流體機(jī)械;2000年02期

8 唐囡;任剛;蔡建程;袁民建;;蝸殼壁厚對離心風(fēng)機(jī)振動(dòng)噪聲影響的數(shù)值研究[J];流體機(jī)械;2009年02期

9 王建泉;王坤;;循環(huán)泵葉輪的結(jié)構(gòu)強(qiáng)度分析[J];內(nèi)蒙古科技與經(jīng)濟(jì);2008年08期

10 陳虹微;王榮杰;;風(fēng)機(jī)振動(dòng)分析與處理[J];噪聲與振動(dòng)控制;2007年02期

相關(guān)博士學(xué)位論文 前1條

1 李吉;旋轉(zhuǎn)機(jī)械結(jié)構(gòu)噪聲及其控制機(jī)理的研究[D];大連理工大學(xué);2002年

，

本文編號：1389166