【正文】 3):254306.[7] 俞書宏，馬寶嬌，[J],武漢化工學(xué)院學(xué)報，1992，14(3,4):87.[8] 孫尚亮，[J],醫(yī)藥設(shè)計,1984,(4).[9] 孫志禮,[M].沈陽:東北大學(xué)出版社,2000,3233．[10] 侯珍秀,[M].哈爾濱:哈爾濱工業(yè)大學(xué)出版社,2001,3233．[11] Erdesz K Mujumdar A S. Numerical Investigation of a Phenomenological Model for VFB[J],Drying Technology,1989,7(3):487502.[12] 聞邦春,[M],北京:機械工業(yè)出版社,1982.[13] [A],第三次全國干燥技術(shù)交流會論文集[C], .[14] 俞書宏,馬寶嬌,（VFB）干燥性能及傳熱性能的研究［A］,武漢化工學(xué)院學(xué)報[C],1992,14(3, 4):99.[15] 金國淼,[M],北京:化學(xué)工業(yè)出版社,2002.[16] Mujumdar A S. Handbook of Industrial Drying[M],New York:Marcel Dekker,1987.[17] 劉相東,[M],北京:化學(xué)工業(yè)出版社,2004.[18] 成大先,[M],北京:化學(xué)工業(yè)出版社,2002,9.[19] Kudra T, Mujudar A Drying Technologies[M],Marcel Dekker N Y 1997.[20] Wimmerstedt Drying: History and Future[J],Drying’94, , , Australia,1994,314.[21] 島村榮一. 振動干燥機的性能及應(yīng)用［M］,食品機械裝置,1976,4(141):82.[22] 施關(guān)春. 谷物烘干機的安全使用[J],農(nóng)機使用與維修,2003,(01).東北大學(xué)畢業(yè)設(shè)計（論文） 結(jié)束語東北大學(xué)畢業(yè)設(shè)計（論文） 結(jié)束語結(jié)束語45本論文是在指導(dǎo)教師鄧永勝老師的悉心指導(dǎo)下完成的，從課題選題、方案制定和到生產(chǎn)現(xiàn)場進行實驗研究等方面無不傾注了導(dǎo)師的指導(dǎo)和關(guān)懷。在學(xué)習(xí)上，鄧老師悉心的教導(dǎo)，讓我收益終身。在本次設(shè)計過程中，我也受到了其他老師的熱心幫助和指導(dǎo)，他們耐心講解的態(tài)度和有問必答的精神真的讓我很難忘。在此，謹向鄧老師、張老師、劉老師以及其他幫助過我的老師和同學(xué)們致以我最崇高的敬意和衷心的感謝!通過現(xiàn)場參觀，以及對ZL1575振動流化床干燥機參考資料的查閱，使自己對干燥機的一些知識有了初步的了解和掌握；通過實踐，鞏固了大學(xué)期間所學(xué)機械理論知識和并且也很大程度的擴展實際動手能力，理論與實踐的相結(jié)合，對于所學(xué)的知識認識的更加深刻；通過對此系列的干燥機的學(xué)習(xí)和研究，初步了解到了國內(nèi)外在此方面的科研成果和發(fā)展動態(tài)；在學(xué)習(xí)和設(shè)計研究中，讓自己學(xué)以致用，在實際中檢驗和鞏固了所學(xué)過的知識，鍛煉自己的實際動手能力，在分析問題和解決問題的能力上面有了很大的提高，對自己以后的學(xué)習(xí)和工作打下非常堅實的基礎(chǔ)。通過這次畢業(yè)設(shè)計，我也學(xué)會了一些從沒學(xué)過的知識，學(xué)會了用設(shè)計的角度來看問題，查閱資料文獻最終解決問題的一些方法。也了解到了許多除了理論知識之外，在實際設(shè)計中應(yīng)考慮多方面的實質(zhì)性的要素要求，同時我被機械設(shè)計的魅力深深感染，了解到了它的獨有的特色，也許目前我還很欠缺經(jīng)驗，但是正是這樣，讓我更加堅定了自己要隨時做好學(xué)習(xí)的準備，補充自己的經(jīng)驗值的決心；這些都為我以后的學(xué)習(xí)指明方向，同時，在本次設(shè)計中也認識到了自己在學(xué)習(xí)上的一些不足之處，例如注重理論知識的吸收，忽略了一些實際現(xiàn)場中要必須考慮的因素。而在這次設(shè)計中，讓我深刻的認識到這點，在今后的學(xué)習(xí)中一定能夠克服這些不足，使自己的設(shè)計水平不斷提高。這次畢業(yè)設(shè)計，既為我四年的大學(xué)生活劃上了句號，同時也為我今后的研究生生活拉開了序幕，也正是通過本次設(shè)計的鍛煉，讓我深刻的領(lǐng)會到在今后的學(xué)習(xí)中只有勤于發(fā)現(xiàn)問題、認真的分析和解決問題，不斷地努力奮斗，不斷提高自己，在不久的將來我也一定能為祖國的工業(yè)事業(yè)的發(fā)展，貢獻出自己的一份力量。東北大學(xué)畢業(yè)設(shè)計（論文） 附錄（外文原文）附錄（外文翻譯）外文原文60Homogeneous Fluidization Characteristics of Vibrating Fluidized BedsIn recent years, there has been growing interest in utilizing mechanical vibration to improve the performance of a fluidized bed in the processing of relatively large particles. The advantages of vibrating fluidized beds (VFB) over conventional fluidized beds include reduced minimal fluidization velocity and fluidization pressure drops, increased efficiency of gassolid contact and improved homogeneity and stability of the fluidized bed layers. These advantages can be used in drying, cooling, heating, separating, mixing process, etc.In conventional fluidized beds, the possibility for arising of homoor heterogeneous fluidization is connected directly with the socalled stability of the fluidized system. Moreover, the theories dealing the stability often examine the behavior of their density microfluctuation. The stability of the bed density is a subject of focus in the segregation of granular solids. Any large fluctuation in the bed density will result in a failure of separation in some regions and this leads to a decrease in the total separation efficiency. In developing better separation technology, a greater stability of bed layers will be required. A method for the classification of granular materials in vibrating fluidized beds has already been suggested (Zhang et al., 1996。 Chen et al., 1993), which is useful in the separation of fine coal and the segregation of waste cokeslag mixture. All these technologies use vibration energy to improve bed homogeneity.The effects of vibration on fluidization quality are important for separation in fluidized beds. However, there have been only few studies of the effect of vibration on fluidization homogeneity in the literature. By analyzing capacitance charts, Morse (1955) suggests that homogeneity and stability exist only for beds of smaller particles (1–70μm) and high frequencies of vibration (l0–50Hz). By measuring the fluctuations of voidage in space and in time using a capacitance probe, Mushtaev (1979) showed that the bed homogeneity begins to deteriorate with severe fountain action of the particle beds when the vibration acceleration exceeds 4 g, namely . Experiments by Jinescu(1972) showed that homogeneity up to 95% could be achieved by the vibration of a gas in the continuous phases in a vibrated fluidized bed and in a nonvibrated fluidized bed. Gutmam (1976) measured vibrated beds without gas flow and showed that the fluctuation of voidage was less than %. However, studies on the homogeneity and stability of vibrated fluidized beds are still not enough. The present work aims to provide guidelines for better operating conditions through theoretical analysis and experimental verification using the analysis of the fluctuation of local voidage signals.Experimental Apparatus and Measurement MethodExperimental ApparatusThe experiments were carried out in a Perspex column of m diameter and m height. Air was supplied through the distributor consisting of a perforated steel plate and textile. The perforated steel plate was a mm thick with 2 mm diameter holes and a free area of percent. The textile was type 1207 and mm thick. A hydraulic vibrator under the bed forms a sinusoidal waveform. The vibration frequency and amplitude were measured with a frequency converter (Japan Sanken Corp, SSF552) and an optical microscope (177。 mm) respectively. The local voidage signals were collected by a data acquisition system consisting of an optical fibre probe, an analogue/digital converter and a personal puter. The optical fibre probe was suspended from the top into the fluidized layer, which decreased the effect of vibration on the experimental data. The data used to derive the axial local voidage was sampled at different fixed fluidization velocity and vibration intensity. Several materials with different vibration parameters and different operat