本文選題：無(wú)油渦旋壓縮機(jī) + 表面粗糙度　； 參考：《蘭州理工大學(xué)》2012年碩士論文

【摘要】：渦旋壓縮機(jī)以結(jié)構(gòu)簡(jiǎn)單、噪聲低、效率高和可靠性好等優(yōu)點(diǎn)，在壓縮機(jī)領(lǐng)域得到快速發(fā)展。近年來(lái)，隨著工業(yè)生產(chǎn)的飛速發(fā)展，一些特殊場(chǎng)合如食品、制藥、空氣分離等領(lǐng)域常需要不被潤(rùn)滑油污染的高壓氣體，為了滿足生產(chǎn)的需求，無(wú)油潤(rùn)滑形式的渦旋壓縮機(jī)產(chǎn)品成為了這些特殊場(chǎng)合的首選。目前無(wú)油潤(rùn)滑渦旋壓縮機(jī)摩擦副的潤(rùn)滑是通過(guò)鑲嵌自潤(rùn)滑材料來(lái)實(shí)現(xiàn)的。因此，自潤(rùn)滑材料的性能，以及與鋼對(duì)偶摩擦?xí)r的特性，對(duì)壓縮機(jī)的性能有著重要的影響，所以開(kāi)展自潤(rùn)滑材料性能及與鋼對(duì)偶摩擦的研究，對(duì)無(wú)油渦旋壓縮機(jī)的自潤(rùn)滑材料的設(shè)計(jì)和壓縮機(jī)的理論計(jì)算具有重要的實(shí)際指導(dǎo)意義和理論價(jià)值。 本文首先在觸針式表面輪廓儀上分別采集了聚醚醚酮（PEEK）壓膜成形原始表面和經(jīng)砂紙打磨表面的輪廓曲線，采用結(jié)構(gòu)函數(shù)法對(duì)所采集的表面輪廓曲線進(jìn)行了分形表征，，結(jié)果表明聚醚醚酮壓膜成形初始表面和打磨之后的表面均具有顯著的分形特征。 為探究PEEK不同表面粗糙度與分形維數(shù)之間的關(guān)系，根據(jù)PEEK不同表面粗糙度的輪廓曲線的分形特征和分形維數(shù)，利用SPSS統(tǒng)計(jì)軟件對(duì)粗糙度和分形維數(shù)兩組數(shù)據(jù)進(jìn)行擬合并得到最佳的擬合模型。結(jié)果表明：分維可以作為一個(gè)獨(dú)立的表征參量來(lái)表征粗糙表面的復(fù)雜程度和粗糙度水平；由擬合結(jié)果可知，對(duì)于PEEK，分維與粗糙度存在單調(diào)遞減的關(guān)系，粗糙度數(shù)值越大，表面越粗糙，分維數(shù)值越小；通過(guò)分維值與粗糙度之間的關(guān)系式，在一定范圍內(nèi)，可以通過(guò)粗糙度值計(jì)算得出分維值D。 基于分形理論對(duì)PEEK表面分形維數(shù)、摩擦系數(shù)分形維數(shù)及其關(guān)聯(lián)對(duì)PEEK自潤(rùn)滑材料原始表面特征與球墨鑄鐵對(duì)偶摩擦副摩擦性能的關(guān)系進(jìn)行了研究。通過(guò)觸針式表面輪廓儀獲得PEEK改性前后不同表面的粗糙度并采集了其輪廓曲線和數(shù)據(jù)，在UMT-3摩擦試驗(yàn)機(jī)上對(duì)改性前后不同表面粗糙度的PEEK與球墨鑄鐵配對(duì)進(jìn)行了變載荷、定速度的摩擦試驗(yàn)。運(yùn)用分形理論隨機(jī)過(guò)程的結(jié)構(gòu)函數(shù)方法，分別分析了表面輪廓曲線和摩擦系數(shù)曲線的分形特征，并計(jì)算出不同表面輪廓曲線以及摩擦系數(shù)曲線的分形維數(shù)。結(jié)果表明：PEEK的表面輪廓曲線和實(shí)驗(yàn)?zāi)Σ料禂?shù)曲線具有明顯的分形特征；摩擦信號(hào)的分形維數(shù)與材料的性能、加工方法、材料的初始表面形貌以及摩擦實(shí)驗(yàn)工況有較大的關(guān)系。摩擦系數(shù)曲線分形維數(shù)隨初始表面分形維數(shù)的增大而減小。 將球墨鑄鐵分別與PEEK和PI的復(fù)合材料對(duì)偶進(jìn)行了摩擦實(shí)驗(yàn)，實(shí)驗(yàn)結(jié)果表明：原始表面PEEK復(fù)合材料的摩擦系數(shù)及其相應(yīng)的分形維數(shù)值較小，可以作為很好的自潤(rùn)滑材料；對(duì)自潤(rùn)滑材料表面的加工可以使用壓膜成形或機(jī)加工的方法。
[Abstract]:Scroll compressor has been developing rapidly in the field of compressor because of its simple structure, low noise, high efficiency and good reliability. In recent years, with the rapid development of industrial production, some special occasions, such as food, pharmaceutical, air separation and other fields often need not to be contaminated by lubricating oil high pressure gas, in order to meet the needs of production, Non-oil lubricated scroll compressor products have become the first choice for these special occasions. At present, the lubrication of friction pair of oil-free scroll compressor is realized by self-lubricating material. Therefore, the properties of self-lubricating materials and the characteristics of friction with steel have an important effect on the performance of compressors. It is of great practical significance and theoretical value for the design of self-lubricating materials for oil-free scroll compressors and the theoretical calculation of compressors. In this paper, the contour curves of the original surface formed by polyether ether ketone (PEEK) pressure film and the surface polished by sandpaper were collected on the stylus surface profilometer, and the surface contour curves were characterized by the structure function method. The results show that both the initial surface and the polished surface of PEK film have significant fractal characteristics. In order to explore the relationship between different surface roughness and fractal dimension of peek, according to the fractal characteristic and fractal dimension of contour curve of peek surface roughness, The best fitting model is obtained by combining roughness and fractal dimension with SPSS statistical software. The results show that the fractal dimension can be used as an independent representation parameter to characterize the complexity and roughness level of rough surface, and the fitting results show that for PEEK, the relationship between fractal dimension and roughness decreases monotonously, and the roughness value increases. The rougher the surface, the smaller the fractal dimension, and the fractal dimension D can be obtained by calculating the roughness value in a certain range by the relation between fractal dimension and roughness. Based on fractal theory, the relationship between the surface fractal dimension of peek, the fractal dimension of friction coefficient and the correlation between the original surface characteristics of peek self-lubricating materials and the friction properties of dual friction pairs of nodular cast iron was studied. The roughness of different surfaces before and after peek modification was obtained by using a stylus surface profilometer, and the profile curves and data were collected. The pairing load of peek with different surface roughness before and after modification was studied by UMT-3 friction tester. A constant velocity friction test. The fractal characteristics of the surface contour curve and the friction coefficient curve are analyzed by using the structure function method of the random process of fractal theory, and the fractal dimensions of the different surface contour curves and the friction coefficient curves are calculated. The results show that the surface profile curve and the experimental friction coefficient curve have obvious fractal characteristics, and the fractal dimension of friction signal is related to the properties of the material, the processing method, the initial surface morphology of the material and the friction experimental conditions. The fractal dimension of friction coefficient curve decreases with the increase of initial surface fractal dimension. Friction experiments were carried out between ductile iron and peek and Pi composites respectively. The experimental results show that the friction coefficient and the corresponding fractal dimension of the original PEEK composite are smaller and can be used as a good self-lubricating material. The surface of self-lubricating material can be machined by film forming or machining.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類(lèi)號(hào)】：TH45

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 鄭尚書(shū);無(wú)油潤(rùn)滑渦旋壓縮機(jī)防自轉(zhuǎn)機(jī)構(gòu)動(dòng)力特性研究[D];蘭州理工大學(xué);2013年

本文編號(hào)：2014230