本文選題：螺旋卸船機 + 垂直輸送機��； 參考：《武漢理工大學(xué)》2014年碩士論文

【摘要】：螺旋卸船機是一種大型的專用連續(xù)型散貨卸船機械，在現(xiàn)代港口及散貨碼頭物流中占有非常重要的地位，具有卸船效率高、環(huán)境污染小、對船型與貨物的適用性廣、重量輕、結(jié)構(gòu)簡單等優(yōu)點。本文所研究的新型L型螺旋卸船機，相比于傳統(tǒng)螺旋卸船機，在取料方式、垂直螺旋中間支撐方式、料流轉(zhuǎn)接方式、輸送機支承結(jié)構(gòu)以及俯仰平衡系統(tǒng)等方面進行了大量創(chuàng)新，提高了卸船效率，降低了卸船能耗。 垂直螺旋輸送機是新型L型螺旋卸船機的核心組成部分，它的性能直接影響整個螺旋卸船機的工作效率，對其進行研究主要可分為兩個方面：1、物料垂直輸送性能；2、結(jié)構(gòu)的動力學(xué)性能。其中，由于垂直螺旋輸送機結(jié)構(gòu)龐大，載荷組合極為復(fù)雜，動力學(xué)行為難以預(yù)測，目前國內(nèi)外對其結(jié)構(gòu)的動力學(xué)性能研究還處于基礎(chǔ)階段。本文以新型L型螺旋卸船機垂直螺旋輸送機作為研究對象，運用動力學(xué)理論以及有限元分析方法，對輸送機的結(jié)構(gòu)振動特性進行研究，，主要工作包括以下幾個方面： 1、針對垂直螺旋輸送機結(jié)構(gòu)動載的初始激勵形式以及振動機理進行了研究，確定了激勵的產(chǎn)生與作用方式，并給出了激勵的計算式。 2、建立了集中參數(shù)下垂直螺旋輸送機結(jié)構(gòu)響應(yīng)系統(tǒng)的離散模型和模型的動力學(xué)方程，選取X方向振動為研究對象，求解動力學(xué)方程，得到了離散模型的固有特性以及對任意激勵的響應(yīng)。 3、運用Ansys軟件建立了垂直螺旋輸送機結(jié)構(gòu)響應(yīng)系統(tǒng)的有限元模型，分析了作用于模型的靜載荷，求出了模型的結(jié)構(gòu)靜力特性以及模態(tài)特性，明確了電機和螺旋軸的偏心振動是引起輸送機振動的主要原因。 4、通過擴展分析周期，將瞬態(tài)動力學(xué)分析方法運用到本文的振動效應(yīng)研究中，求出了垂直電機額定轉(zhuǎn)速下結(jié)構(gòu)的位移響應(yīng)結(jié)果與應(yīng)力響應(yīng)結(jié)果，由結(jié)果可知，輸送機的振動最終將達到穩(wěn)態(tài)，并且結(jié)構(gòu)在Y方向的振動要比在X方向的振動嚴重。運用諧響應(yīng)分析技術(shù)，研究了垂直螺旋輸送機結(jié)構(gòu)響應(yīng)系統(tǒng)在不同的電機轉(zhuǎn)速下結(jié)構(gòu)的振動響應(yīng)幅值分布規(guī)律，得到了結(jié)構(gòu)的共振速度區(qū)間，為輸送機工作速度的選取與制定提供了理論依據(jù)。
[Abstract]:Spiral ship unloader is a kind of special and continuous bulk ship unloader, which occupies a very important position in modern port and bulk terminal logistics. It has high unloading efficiency, low environmental pollution, wide applicability to ship type and cargo, and light weight. Simple structure and other advantages. Compared with the traditional spiral ship unloader, the new L type screw ship unloader studied in this paper has made a great deal of innovations in the aspects of material collection, vertical screw intermediate support, material flow connection, conveyor support structure and pitching balance system, etc. The efficiency of unloading is improved and the energy consumption of unloading is reduced. Vertical screw conveyer is the core part of the new L type screw ship unloader. Its performance directly affects the working efficiency of the whole screw ship unloader. The research can be divided into two aspects: 1, the vertical conveying performance of material and the dynamic performance of the structure. Due to the large structure of vertical screw conveyor, the load combination is extremely complex, and the dynamic behavior is difficult to predict, the research on the dynamic performance of the structure is still in the basic stage at home and abroad. In this paper, the dynamic theory and finite element analysis method are used to study the structural vibration characteristics of the new type L screw ship unloader vertical screw conveyor. The main work includes the following aspects: 1. The initial excitation form and vibration mechanism of the vertical screw conveyor structure are studied, and the generation and action mode of the excitation are determined, and the calculation formula of the excitation is given. 2. The discrete model and the dynamic equation of the structural response system of vertical spiral conveyor under concentrated parameters are established. The vibration in X direction is selected as the research object, and the dynamic equation is solved. The inherent characteristics of the discrete model and the response to arbitrary excitation are obtained. 3. The finite element model of the structural response system of vertical spiral conveyor is established by using Ansys software. The static load acting on the model is analyzed, and the static and modal characteristics of the model are obtained. The eccentricity vibration of motor and helical shaft is the main cause of the vibration of conveyer. 4. By extending the analysis period, the transient dynamic analysis method is applied to the study of vibration effect in this paper, and the displacement response and stress response of the structure under rated speed of vertical motor are obtained. The vibration of the conveyor will eventually reach steady state, and the vibration of the structure in Y direction is more serious than that in X direction. By means of harmonic response analysis technique, the amplitude distribution of structural vibration response of vertical spiral conveyor under different motor speeds is studied, and the resonance velocity range of the structure is obtained. It provides a theoretical basis for the selection and formulation of the working speed of the conveyer.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U653.928.1

【參考文獻】

相關(guān)期刊論文 前10條

1 劉榮煜;;國內(nèi)外港口物流的借鑒與比較[J];對外經(jīng)貿(mào)實務(wù);2010年12期

2 顧德軍,欒華;2極中型異步電動機振動產(chǎn)生的原因及處理[J];防爆電機;2005年03期

3 肖曙光,陳琦,孫美忠,蔣國慶,羅崢,陳再新;九十年代先進水平的港口散貨裝卸系統(tǒng)[J];港口裝卸;2000年06期

4 陳寧;散貨卸船技術(shù)綜述[J];中國港口;1999年05期

5 黃雅達;散裝物料垂直螺旋輸送機[J];港口裝卸;2003年06期

6 閆舒靜;三相異步電機故障診斷的振動頻譜分析研究[J];河北建筑科技學(xué)院學(xué)報;1998年02期

7 周秀明;;電機振動故障診斷方法[J];機械管理開發(fā);2007年01期

8 王天煜;王鳳翔;白浩然;張國衛(wèi);;大型異步電機結(jié)構(gòu)振動特性的研究[J];機械強度;2009年01期

9 張心華;;分析電機振動的原因及預(yù)防措施[J];科技信息(科學(xué)教研);2008年16期

10 孟文俊;王曉z

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