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重慶理工大學(xué)畢業(yè)論文 磁流變液動(dòng)壓軸承設(shè)計(jì)
目錄
摘 要 I
Abstract II
1 磁流變液動(dòng)壓軸承介紹 1
1.1 磁流變液的介紹 1
1.1.1 磁流變液定義 1
1.1.2 磁流變液的制備 1
1.1.3磁流變液應(yīng)用范圍 2
1.1.4 磁流變液應(yīng)滿足的指標(biāo)： 3
1.1.5 磁流變液發(fā)展其前景 3
1.2 滑動(dòng)軸承簡(jiǎn)介 4
1.3 磁流變液動(dòng)壓軸承 5
2 方案設(shè)計(jì)以及選取 5
2.1 滑動(dòng)軸承的分類 5
2.2 滑動(dòng)軸承的選取 7
2.3 電磁場(chǎng)的添加 9
2.4 密封方式選擇 11
2.5 軸承座選取以及建模 12
2.5.1 軸承座上端 13
2.5.2 軸承座下端 14
2.5.3 軸瓦 14
2.5.4 軸承裝配圖 15
3.1 滑動(dòng)軸承的處電磁引入 16
3.2 磁流變液的添加 17
3.3 磁流變液動(dòng)壓軸承原理 19
3.3.1 磁流變液添加以及電線接入 19
3.3.2 磁流變液裝載位置 19
3.3.3 磁流變液的密封 20
4 主要尺寸以及主要計(jì)算 21
4.1 軸承座的具體尺寸 21
4.1.1 軸承座上端 21
4.1.2 軸承座下端 22
4.1.3 軸瓦 24
4.2 滑動(dòng)軸承所涉及的主要計(jì)算 24
4.2.1 電磁場(chǎng)的計(jì)算 24
4.2.2 磁流變液粘度的計(jì)算 25
4.2.3 磁流變液油膜承載能力計(jì)算 25
5 SolidWorks仿真分析 26
5.1 爆炸視圖 26
5.2 仿真運(yùn)動(dòng) 28
6 總結(jié) 30
致謝 31
參考文獻(xiàn) 32
文獻(xiàn)綜述 33
摘 要
磁流變液是可磁極化的固體微顆粒在基液中形成的懸浮液，其流變特性可由外加磁場(chǎng)連續(xù)控制。當(dāng)不加磁場(chǎng)時(shí)，磁流變液表現(xiàn)出類似牛頓流體的行為；當(dāng)外加磁場(chǎng)時(shí)，磁流變液中的磁性顆粒沿磁場(chǎng)方向排成鏈狀，這些鏈狀結(jié)構(gòu)阻止了液體的流動(dòng)，因而改變了磁流變液的流變特性，其流動(dòng)表現(xiàn)出Bingham塑性體行為，具有粘性和塑性特性。
隨著磁流變液在機(jī)械應(yīng)用中的不斷發(fā)展，越來越多的將磁流變液運(yùn)用于各種機(jī)械器件中。磁流變液在外加磁場(chǎng)增強(qiáng)的過程中，液體的粘度隨之增大并最終失去流動(dòng)性變?yōu)楣虘B(tài)，此過程耗能小、可逆、能產(chǎn)生較大屈服應(yīng)力且在豪秒級(jí)內(nèi)完成。利用此一系列性能，在充分考慮磁場(chǎng)、溫度、顆粒尺寸、壁面效應(yīng)和體積濃度等諸因素對(duì)應(yīng)用器件影響的基礎(chǔ)上，可開發(fā)各種磁流變阻尼器件。由于磁流變液相變的過程在毫秒量級(jí)內(nèi)完成，因此可以做成敏捷度極高的控制元件，用于聯(lián)接和傳遞兩部件之間的力或力矩。如汽車用離合器、制動(dòng)器等。磁流變液動(dòng)壓軸承也是基于這個(gè)原理設(shè)計(jì)的。
關(guān)鍵詞：磁流變液 動(dòng)壓軸承 設(shè)計(jì)
Abstract
Magnetorheological fluid is a magnetic pole of the solid particles in suspension, formed in the base of its rheological properties can be made of continuous control plus a magnetic field. When without magnetic field, the magnetic rheological fluid showed similar behavior of Newtonian fluid; When applied magnetic field, the magnetic particles of magnetorheological fluid along the magnetic field direction in chain, the chain structure to prevent the flow of the liquid, and thus change the rheological properties of MRF, the flow show the Bingham plastic body behavior, viscous and plastic characteristics.
As the MRF in mechanical applications development, more and more application of MRF to various kinds of mechanical device. Magnetorheological fluid in the process of plus enhanced magnetic field, the liquid viscosity increase and eventually lose liquid into a solid, the process energy consumption of small, reversible, can produce a large yield stress and in house finish in second grade. Using this series of performance, in full consideration magnetic field, temperature, particle size, surface effect and volume concentration, etc. Various factors influence, on the basis of the application components can develop all kinds of magnetorheological damping devices. Due to magnetic rheological liquid phase change is accomplished within millisecond level, so you can make it high agility control element, is used to join and transfer force or moment between the two parts. Such as automotive clutch, brake, etc. Magnetorheological fluid dynamic pressure bearing is designed based on this principle.
Keywords: magnetorheological fluid dynamic pressure bearing design
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1 磁流變液動(dòng)壓軸承介紹
1.1 磁流變液的介紹
1.1.1 磁流變液定義
磁流變液（Magnetorheological Fluid , 簡(jiǎn)稱MR流體）屬可控流體，是智能材料中研究較為多的一種材料。磁流變液一般由鐵磁性易磁化顆粒、母液油和穩(wěn)定劑三種物質(zhì)構(gòu)成。