本文選題：磁流變液　切入點：加載裝置設(shè)計　出處：《上海工程技術(shù)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：磁流變液(Magnetorheological Fluids,簡稱MRF)是一種智能材料,其流變特性可以在外加磁場作用下發(fā)生巨大變化,且這種變化連續(xù)、可逆、可控。在無外加磁場作用時,其表現(xiàn)出流動性好、粘度低的牛頓流體特性;當(dāng)有外加磁場作用時,其表觀粘度在毫秒級時間內(nèi)變化出流動性低、粘度高的Bingham流體特性�；谶@一特性開發(fā)的磁流變液加載裝置結(jié)構(gòu)簡單、加載平穩(wěn)、體積小、能耗低、響應(yīng)快,在工程應(yīng)用領(lǐng)域具有廣泛的前景。本文設(shè)計的磁流變液加載裝置是通過改變磁流變液的剪切屈服強(qiáng)度實現(xiàn)加載力矩的改變,剪切屈服強(qiáng)度的大小可由外加磁場的變化來控制。本文在分析了國內(nèi)外對磁流變液材料及其應(yīng)用研究現(xiàn)狀的基礎(chǔ)上,結(jié)合機(jī)械設(shè)計方法對圓盤剪切式磁流變液加載裝置進(jìn)行了分析,建立了盤式加載裝置的加載力矩方程,闡述了盤式加載裝置的設(shè)計過程和實驗方法,對磁流變效應(yīng)的可逆性進(jìn)行了驗證,為擴(kuò)展磁流變材料工程應(yīng)用領(lǐng)域提供了依據(jù)。本文的主要研究工作如下:1)回顧了磁流變液在工程領(lǐng)域中的應(yīng)用,對磁流變液技術(shù)目前存在的一些問題進(jìn)行簡單闡述,介紹磁流變液的組成成分及各成分的作用,研究磁流變液的分類、磁流變效應(yīng)、流變特征、流變機(jī)理,分析磁流變效應(yīng)的影響因素。2)對磁流變液加載裝置進(jìn)行理論分析,研究磁流變液加載裝置的特點及工作模式并對每一工作模式進(jìn)行詳細(xì)介紹,研究磁流變液加載裝置的工作形式并對每一工作形式進(jìn)行介紹,對加載執(zhí)行機(jī)構(gòu)的磁路進(jìn)行設(shè)計,對圓盤剪切式磁流變液加載裝置進(jìn)行分析,基于Bingham模型研究圓盤式加載裝置的工作原理、建立圓盤式加載裝置加載力矩的計算公式,分析加載力矩的影響因素以及與各影響因素之間的關(guān)系,為加載裝置的設(shè)計提供理論依據(jù)。3)對磁流變液加載執(zhí)行機(jī)構(gòu)進(jìn)行結(jié)構(gòu)設(shè)計,介紹磁流變液加載裝置的設(shè)計準(zhǔn)則,對加載執(zhí)行機(jī)構(gòu)的密封裝置、軸承、鍵、螺栓以及轉(zhuǎn)軸等主要裝置或部件進(jìn)行設(shè)計和計算。4)對磁流變液加載系統(tǒng)實驗臺架的搭建進(jìn)行介紹,介紹加載系統(tǒng)中冷卻系統(tǒng)、電力控制系統(tǒng)的設(shè)計和作用,對磁流變液加載裝置執(zhí)行系統(tǒng)進(jìn)行詳細(xì)介紹,包括加載裝置執(zhí)行機(jī)構(gòu)主要部件的材料、形狀和三維圖等。5)為驗證磁流變液加載裝置的可逆性設(shè)計實驗方案、實驗布置,分別介紹每一實驗工況的實驗內(nèi)容以及實驗?zāi)康?對磁流變液加載裝置進(jìn)行現(xiàn)場實驗,對照實驗?zāi)康膶嶒灁?shù)據(jù)進(jìn)行整理分析,得出加載裝置可逆的實驗結(jié)論。6)對本文的工作進(jìn)行總結(jié)。
[Abstract]:Magnetorheological fluid (MRF) is a kind of intelligent material, its rheological properties can change greatly under the action of external magnetic field, and the change is continuous, reversible and controllable. The properties of Newtonian fluid with low viscosity and low fluidity and high viscosity can be obtained by changing the apparent viscosity of Newtonian fluid in millisecond when the magnetic field is applied. The structure of the Magnetorheological fluid loading device based on this characteristic is simple. Because of its stable loading, small volume, low energy consumption and fast response, the MRF loading device designed in this paper can change the loading torque by changing the shear yield strength of MRF. The shear yield strength can be controlled by the change of magnetic field. Combined with the mechanical design method, the disk shear magneto-rheological fluid loading device is analyzed, the loading moment equation of the disc loading device is established, and the design process and experimental method of the disc loading device are described. The reversibility of magnetorheological effect is verified, which provides a basis for expanding the engineering application of MRF. The main research work in this paper is as follows: 1) the application of MRF in engineering field is reviewed. Some problems existing in magnetorheological fluid technology are briefly described. The composition of MRF and its function are introduced. The classification of MRF, the effect of MRF, rheological characteristics and rheological mechanism are studied. Analyzing the influencing factors of magnetorheological effect. (2) analyzing the theory of magneto-rheological fluid loading device, studying the characteristics and working mode of magnetorheological fluid loading device, and introducing each working mode in detail. This paper studies the working form of the magnetorheological fluid loading device and introduces each working form, designs the magnetic circuit of the loading actuator, and analyzes the disk shear magnetorheological fluid loading device. Based on the Bingham model, the working principle of the disk loading device is studied, and the calculation formula of the loading moment of the disc loading device is established, and the influence factors of the loading moment and the relationship between the loading moment and the influencing factors are analyzed. To provide a theoretical basis for the design of the loading device. 3) to design the structure of the MRF loading actuator, introduce the design criteria of the MRF loading device, the sealing device, the bearing, the key of the loading actuator, The design and calculation of the main devices or components such as bolts and rotating shafts are introduced in this paper. The design and function of the cooling system and the electric control system in the loading system are introduced, and the construction of the experimental bench for the magnetorheological fluid loading system is introduced. The execution system of the MRF loading device is introduced in detail, including the material, shape and 3D figure of the main parts of the actuator, etc., in order to verify the reversible design scheme and experimental arrangement of the MRF loading device, This paper introduces the experimental contents and purposes of each experiment condition, carries on the field experiment to the magnetorheological fluid loading device, and collates and analyzes the experimental data in comparison with the experimental purpose. The reversible experimental conclusion of loading device. 6) summarize the work of this paper.
【學(xué)位授予單位】：上海工程技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB381

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