本文選題：空間環(huán)境 + 磁性液體��； 參考：《北京交通大學(xué)》2014年碩士論文

【摘要】：作為一種新型功能材料,磁性液體具有獨特的性質(zhì),既具有液體的流動性,又具有固體磁性材料所具有的磁性。并且隨著科學(xué)和技術(shù)的發(fā)展,磁性液體的應(yīng)用領(lǐng)域正在不斷擴大。到目前為止,磁性液體已經(jīng)廣泛應(yīng)用于轉(zhuǎn)軸動密封、靜密封、傳感器元件、減震器等。磁性液體的氣體密封技術(shù)已經(jīng)相當成熟。 磁性液體由三部分組成,分別為基載液、磁性顆粒以及表面活性劑。沒有表面活性劑,磁性顆粒將產(chǎn)生分離而不能均勻的混合在基載液中。表面活性劑包裹磁性顆粒使他們在基載液中相互排斥,這將阻止顆粒的沉淀并保持穩(wěn)定的分布狀態(tài)。通過眾多學(xué)者的多年努力,磁性液體已經(jīng)成功應(yīng)用于很多領(lǐng)域,旋轉(zhuǎn)密封是其中應(yīng)用之一。磁性液體的性能對磁性液體密封的能力有很大的影響。空間環(huán)境復(fù)雜多變,為了提高密封的可靠性,需要采用無損檢測方法確定磁性液體的分布狀態(tài)。 本文作者主要進行了以下幾個方面的研究： (1)根據(jù)空間站舷窗的工作環(huán)境,設(shè)計出三種不同結(jié)構(gòu)的磁性液體密封裝置,分別為極齒在極靴內(nèi)徑上、極齒在極靴外徑上、盲孔軸,并加工成實物； (2)用ANSYS有限元分析軟件根據(jù)電磁場基本理論對設(shè)計的磁性液體密封裝置進行模擬分析,得出了密封間隙中磁場的分布情況,同時也得出了密封件的理論密封耐壓能力; (3)研究出用于磁性液體密封裝置的無損檢測方法,并提出了完整的檢測方案。
[Abstract]:As a new functional material, magnetic liquid has unique properties, both liquid fluidity and solid magnetic material.With the development of science and technology, the application of magnetic fluid is expanding.So far, magnetic fluid has been widely used in rotating shaft dynamic seal, static seal, sensor elements, shock absorbers and so on.Gas sealing technology for magnetic liquids is quite mature.The magnetic liquid consists of three parts: base liquid, magnetic particle and surfactant.Without surfactants, magnetic particles will be separated and unevenly mixed in the base solution.The surfactant encapsulates the magnetic particles, which repel each other in the base solution, which prevents the particles from precipitating and maintains a stable distribution.Through the efforts of many scholars, magnetic fluid has been successfully applied in many fields, among which rotary seal is one of the applications.The performance of magnetic fluid has great influence on the sealing ability of magnetic fluid.The space environment is complex and changeable. In order to improve the reliability of seal, nondestructive testing method is needed to determine the distribution of magnetic fluid.The author of this paper mainly studies the following aspects:1) according to the working environment of the space station sidescuttles, three kinds of magnetic liquid sealing devices with different structures are designed. They are polar teeth in the inner diameter of the polar boots, polar teeth in the outer diameter of the polar boots, blind hole shafts, and processed into physical objects.2) the magnetic fluid sealing device is simulated and analyzed by using ANSYS finite element analysis software according to the basic theory of electromagnetic field, and the distribution of magnetic field in the seal clearance is obtained, and the theoretical sealing pressure resistance of the seal is also obtained.A nondestructive testing method for magnetic liquid sealing device is developed, and a complete testing scheme is proposed.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TB42;TB34

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