發(fā)布時(shí)間：2018-02-01 19:51

  本文關(guān)鍵詞： 高速旋轉(zhuǎn)圓盤 空氣流場(chǎng) 氣固耦合 計(jì)算機(jī)硬盤　出處：《吉林大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：封閉腔室旋轉(zhuǎn)圓盤作為典型的機(jī)械結(jié)構(gòu),被廣泛應(yīng)用于工業(yè)領(lǐng)域,如機(jī)械式硬盤、圓鋸片、壓縮機(jī)圓盤等。為了提高圓盤工作穩(wěn)定性,對(duì)高速旋轉(zhuǎn)圓盤封閉腔室內(nèi)流體和圓盤的耦合特性研究,具有重要的實(shí)際意義和應(yīng)用價(jià)值。本文通過理論與實(shí)驗(yàn)相結(jié)合的方法,研究氣固耦合下剛性和柔性旋轉(zhuǎn)圓盤封閉腔室流體的特性和規(guī)律,分析了不同轉(zhuǎn)速、傾角、厚度、軸向位置和軸徑尺寸的旋轉(zhuǎn)圓盤對(duì)腔室內(nèi)圓盤和流體運(yùn)動(dòng)的影響,并設(shè)計(jì)搭建了專門的試驗(yàn)臺(tái),實(shí)驗(yàn)驗(yàn)證理論仿真結(jié)果的正確性。首先,根據(jù)流體力學(xué)理論,對(duì)封閉腔室內(nèi)剛性旋轉(zhuǎn)圓盤的流場(chǎng)進(jìn)行理論分析�；诜⻊�(wù)器硬盤的內(nèi)部腔室結(jié)構(gòu),建立空氣腔室三維模型并劃分網(wǎng)格。借助Fluent軟件,依照流體真實(shí)流動(dòng)狀態(tài)設(shè)置邊界條件,并進(jìn)行仿真計(jì)算。對(duì)計(jì)算結(jié)果進(jìn)行后處理,研究不同轉(zhuǎn)速下剛性圓盤腔室內(nèi)速度場(chǎng)、壓強(qiáng)場(chǎng)和渦量場(chǎng)的變化規(guī)律。分析表明:腔室內(nèi)速度和壓強(qiáng)整體均隨圓盤轉(zhuǎn)速升高而增大;指定轉(zhuǎn)速下,速度和壓強(qiáng)沿圓盤半徑向外逐漸增大;高轉(zhuǎn)速時(shí),磁頭對(duì)腔室內(nèi)流場(chǎng)影響明顯。其次,進(jìn)一步研究封閉腔室內(nèi)柔性旋轉(zhuǎn)圓盤的氣固耦合特性。首先建立了不同轉(zhuǎn)速、傾角、厚度、軸向位置和軸徑尺寸的柔性旋轉(zhuǎn)圓盤和腔室簡化模型,運(yùn)用COMSOL軟件對(duì)氣體和圓盤進(jìn)行雙向氣固耦合仿真分析。最后對(duì)結(jié)果進(jìn)行后處理,得出氣固耦合作用下圓盤的應(yīng)力應(yīng)變?cè)茍D和氣體的速度壓強(qiáng)云圖。探究不同狀態(tài)下旋轉(zhuǎn)圓盤位移和應(yīng)力的變化,及其對(duì)腔室內(nèi)流體速度和壓強(qiáng)分布造成的影響。分析表明:圓盤和流體間的耦合作用,使傾斜圓盤向垂直于電機(jī)軸圓盤變形;圓盤位置升高度,腔室內(nèi)壓強(qiáng)減小,但速度大小變化不明顯;軸徑增大圓盤應(yīng)力和壓強(qiáng)減小,流體流速增大;當(dāng)圓盤增厚時(shí),應(yīng)力增大,位移減小。最后,設(shè)計(jì)實(shí)驗(yàn)方案,搭建試驗(yàn)臺(tái)軟件和硬件,開展封閉腔室旋轉(zhuǎn)圓盤實(shí)驗(yàn)研究。利用有機(jī)玻璃板構(gòu)造密封腔室,并在上蓋半徑方向上等距布置三個(gè)壓強(qiáng)傳感器,外緣布置轉(zhuǎn)速表。圓盤在不同轉(zhuǎn)速和腔室軸向位置條件下,采集圓盤轉(zhuǎn)速和腔室內(nèi)的壓強(qiáng)。對(duì)壓強(qiáng)數(shù)據(jù)進(jìn)行處理,得出腔室內(nèi)流體壓強(qiáng)隨圓盤轉(zhuǎn)速和位置變化的特性。針對(duì)實(shí)驗(yàn)平臺(tái)構(gòu)建模型進(jìn)行氣固耦合仿真,提取腔室內(nèi)沿半徑方向三點(diǎn)流體壓強(qiáng)值,與實(shí)驗(yàn)結(jié)果相對(duì)照,驗(yàn)證了柔性圓盤氣固耦合仿真結(jié)果的正確性。本文以理論仿真與實(shí)驗(yàn)驗(yàn)證相結(jié)合的方法,研究了剛性旋轉(zhuǎn)圓盤封閉腔室內(nèi)流場(chǎng)的變化特征,和封閉腔室內(nèi)柔性旋轉(zhuǎn)圓盤與空氣的耦合特性,具有一定研究價(jià)值和實(shí)際意義。
[Abstract]:As a typical mechanical structure, closed chamber rotary disk is widely used in industrial fields, such as mechanical hard disk, circular saw blade, compressor disc, etc. In order to improve the stability of disk operation. It is of great practical significance and practical value to study the coupling characteristics of fluid and disk in the chamber of high speed rotating disk. The method of combining theory with experiment is adopted in this paper. The characteristics and rules of fluid in rigid and flexible rotating disk chamber under gas-solid coupling are studied, and different rotational speeds, inclination angles and thickness are analyzed. The influence of the axial position and the diameter of the rotating disc on the disk and fluid motion in the chamber was studied and a special test rig was designed to verify the correctness of the theoretical simulation results. Firstly, according to the hydrodynamics theory. The flow field of rigid rotating disk in closed chamber is analyzed theoretically. Based on the structure of the inner chamber of the server hard disk, the three-dimensional model of the air chamber is established and meshed. Fluent software is used. The boundary conditions are set according to the real flow state of the fluid, and the simulation results are calculated. The velocity field in the rigid disk chamber under different rotational speeds is studied by post-processing the calculated results. The variation of pressure field and vorticity field. The analysis shows that the velocity and pressure of the chamber increase with the increase of the rotating speed of the disk. The velocity and pressure increase gradually along the radius of the disk at specified rotational speed. At high speed, the magnetic head has an obvious effect on the flow field in the cavity. Secondly, the gas-solid coupling characteristics of the flexible rotating disk in the closed chamber are further studied. Firstly, different rotational speeds, inclination angles and thickness are established. The simplified model of flexible rotating disk and chamber with axial position and axial diameter size is used to simulate and analyze bidirectional gas-solid coupling of gas and disk by using COMSOL software. Finally, the results are processed after processing. The stress-strain cloud diagram of the disk and the velocity pressure cloud diagram of the gas are obtained under the action of gas-solid coupling. The changes of displacement and stress of the rotating disc under different states are investigated. The analysis shows that the coupling action between the disk and the fluid causes the inclined disk to be perpendicular to the electric shaft disk. The pressure of the chamber decreases with the elevation of the disc position, but the change of the velocity is not obvious. The axial diameter increases the disc stress and pressure decreases, and the fluid velocity increases. When the disk is thickened, the stress increases and the displacement decreases. Finally, the experimental scheme is designed, the software and hardware of the test bed are built, the closed chamber rotating disk experimental research is carried out, and the sealed chamber is constructed by using the plexiglass plate. At the same time, three pressure sensors are arranged in the radius direction of the upper cover, and the tachometer is arranged on the outer edge. The disk is arranged under the conditions of different rotational speed and axial position of the chamber. The pressure data were processed to get the characteristics of the fluid pressure changing with the rotating speed and position of the disc. The gas-solid coupling simulation was carried out on the experimental platform. Compared with the experimental results, the correctness of gas-solid coupling simulation results of flexible disk is verified by extracting the pressure values of three-point fluid along the radius of the chamber. The method of combining theoretical simulation with experimental verification is used in this paper. The characteristics of the flow field in the closed chamber of rigid rotating disk and the coupling characteristics between the flexible rotating disc and the air in the closed chamber are studied, which is of certain value and practical significance.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH113

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王曉東;陳曉飛;孫淑榮;;波動(dòng)轉(zhuǎn)速旋轉(zhuǎn)圓盤的動(dòng)力學(xué)分析[J];黃金;2010年07期

2 聞蘇平,朱報(bào)禎,秦國良;旋轉(zhuǎn)圓盤系統(tǒng)的流動(dòng)研究現(xiàn)狀與進(jìn)展[J];流體機(jī)械;1997年07期

3 郭厚q,熊國良,李駿;任意作用力下旋轉(zhuǎn)圓盤的動(dòng)態(tài)模型[J];華東交通大學(xué)學(xué)報(bào);2003年01期

4 聞蘇平;胡小文;王軍;馬新民;席光;;旋轉(zhuǎn)圓盤系統(tǒng)過流速度場(chǎng)疊加的研究[J];工程熱物理學(xué)報(bào);2009年01期

5 劉智;何同瑞;胡雨村;;空心旋轉(zhuǎn)圓盤的彈塑性位移分析[J];河北機(jī)電學(xué)院學(xué)報(bào);1991年02期

6 劉信聲,徐秉業(yè),劉越;旋轉(zhuǎn)圓盤的安定分析[J];清華大學(xué)學(xué)報(bào)(自然科學(xué)版);1988年02期

7 王彤,陸逢升,任儉;封閉殼體內(nèi)旋轉(zhuǎn)圓盤附近流場(chǎng)的研究[J];西安交通大學(xué)學(xué)報(bào);1998年05期

8 劉詩漢;陳大融;;旋轉(zhuǎn)圓盤空蝕實(shí)驗(yàn)設(shè)備電機(jī)功率的選擇[J];機(jī)械設(shè)計(jì)與制造;2010年04期

9 潘冬遠(yuǎn);王彤;張斌;楊華;;封閉缸體內(nèi)旋轉(zhuǎn)圓盤流動(dòng)的PIV測(cè)試研究[J];水動(dòng)力學(xué)研究與進(jìn)展A輯;2009年02期

10 李俊妮;栗秀萍;劉有智;涂傳璞;;基于Fluent的高速旋轉(zhuǎn)圓盤表面流場(chǎng)的數(shù)值模擬[J];機(jī)械設(shè)計(jì)與制造;2013年02期

相關(guān)會(huì)議論文 前2條

1 王省哲;李龍飛;;旋轉(zhuǎn)圓盤的空氣彈性動(dòng)力穩(wěn)定性分析[A];慶祝中國力學(xué)學(xué)會(huì)成立50周年暨中國力學(xué)學(xué)會(huì)學(xué)術(shù)大會(huì)’2007論文摘要集（下）[C];2007年

2 趙翔;李映輝;;旋轉(zhuǎn)圓盤上可變擺長的單擺的分岔問題分析[A];第十四屆全國非線性振動(dòng)暨第十一屆全國非線性動(dòng)力學(xué)和運(yùn)動(dòng)穩(wěn)定性學(xué)術(shù)會(huì)議摘要集與會(huì)議議程[C];2013年

相關(guān)碩士學(xué)位論文 前4條

1 遇超;封閉腔室高速旋轉(zhuǎn)圓盤空氣流場(chǎng)仿真與實(shí)驗(yàn)研究[D];吉林大學(xué);2017年

2 潘冬遠(yuǎn);封閉缸體內(nèi)旋轉(zhuǎn)圓盤流動(dòng)研究[D];上海交通大學(xué);2009年

3 宋旭圓;旋轉(zhuǎn)圓盤行波振動(dòng)分析及靜止態(tài)諧響應(yīng)計(jì)算[D];東北大學(xué);2012年

4 李穩(wěn)作;高速旋轉(zhuǎn)圓盤片振動(dòng)特性與失穩(wěn)抑制研究[D];吉林大學(xué);2015年

，

本文編號(hào)：1482734