本文關(guān)鍵詞： 制粒 壓輥 轉(zhuǎn)子 扭矩 能耗　出處：《南京理工大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著飼料產(chǎn)業(yè)和生物質(zhì)能源產(chǎn)業(yè)的快速發(fā)展,制粒機的需求越來越大,性能要求也越來越高,但目前制粒設(shè)備低產(chǎn)能、高能耗問題很突出,已成為制約國內(nèi)制粒機械裝備發(fā)展的瓶頸,極大地削弱了產(chǎn)品的國際競爭力。本文通過理論建模、數(shù)值模擬分析和實驗驗證對高效節(jié)能擠壓制粒成形技術(shù)進行了研究,主要工作如下： (1)基于對制粒結(jié)構(gòu)和制粒機理的研究,建立了粉體單孔擠壓力學(xué)模型,確定了壓輥的受力區(qū)域,并建立了環(huán)模制粒扭矩模型和能耗模型。 (2)對設(shè)計的六種壓輥支撐結(jié)構(gòu)進行了有限元分析,結(jié)果表明支撐結(jié)構(gòu)的剛性跟支承軸的位置、軸的截面形狀和截面面積有關(guān)；只要采用合適的支撐方式,支撐剛性最多可以提高25%以上,有利于提高制粒穩(wěn)定性,實現(xiàn)節(jié)能降耗。 (3)對�？字胁煌锪蠑D壓過程作了有限元分析,結(jié)果表明：長徑比對擠壓受力有重大影響,采用合適的長徑比可有效降低能耗。 (4)對轉(zhuǎn)子系統(tǒng)進行了模態(tài)分析,分析了不同模態(tài)下的固有頻率和振型；基于不同邊界條件和不同筋板厚度對轉(zhuǎn)子系統(tǒng)進行了對比。 (5)建立了轉(zhuǎn)子系統(tǒng)動態(tài)分析模型,基于該模型對轉(zhuǎn)子系統(tǒng)的動態(tài)特性進行了分析,結(jié)果表明擠壓制粒過程呈不穩(wěn)定狀態(tài),不同轉(zhuǎn)速下轉(zhuǎn)子的動態(tài)特性存在差異,進而影響制粒穩(wěn)定性。 (6)進行了扭矩實驗,并驗證了轉(zhuǎn)子系統(tǒng)動態(tài)特性分析結(jié)果。 本文研究成果對制粒機理的完善,制粒產(chǎn)量的提高及制粒能耗的降低具有重要的指導(dǎo)意義。
[Abstract]:With the rapid development of feed industry and biomass energy industry, the demand of granulator is increasing, and the performance requirements are higher and higher. But at present, the problem of low production capacity and high energy consumption of pelletizing equipment is very prominent. Has become a bottleneck restricting the development of domestic granulation machinery and equipment, greatly weakening the international competitiveness of products. Numerical simulation analysis and experimental verification are carried out to study the high efficiency and energy saving extrusion granulation technology. The main work is as follows: 1) based on the research of granulation structure and granulation mechanism, the mechanical model of single hole extrusion of powder is established, the force region of press roller is determined, and the torque model and energy consumption model of ring die granulation are established. The results show that the rigidity of the supporting structure is related to the position of the supporting shaft, the shape of the shaft section and the area of the section. As long as suitable support mode is adopted, the rigidity of support can be increased by more than 25%, which is helpful to improve the stability of granulation and realize energy saving and consumption reduction. The finite element analysis of the extrusion process of different materials in the die hole shows that the ratio of length to diameter has a great influence on the extrusion force, and the energy consumption can be effectively reduced by adopting the appropriate aspect ratio. (4) the modal analysis of rotor system is carried out, and the natural frequency and mode shape under different modes are analyzed, and the rotor system is compared based on different boundary conditions and different stiffened plate thickness. Based on the model, the dynamic characteristics of the rotor system are analyzed. The results show that the extrusion granulation process is unstable. The dynamic characteristics of rotor are different at different speeds, which will affect the stability of granulation. The torque experiment is carried out and the analysis results of the dynamic characteristics of the rotor system are verified. The research results in this paper have important guiding significance for the improvement of granulation mechanism, the increase of granulation yield and the reduction of granulation energy consumption.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH69;S817.12

【引證文獻】

相關(guān)碩士學(xué)位論文 前1條

1 王以龍;高穩(wěn)定、低能耗環(huán)模制粒關(guān)鍵技術(shù)研究[D];南京理工大學(xué);2013年

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本文編號：1447914