含塵離心風(fēng)機(jī)葉片磨損機(jī)理與減磨途徑的研究
發(fā)布時(shí)間：2018-07-30 08:33
【摘要】：氣固兩相流離心風(fēng)機(jī)廣泛應(yīng)用于氣力輸送、煤粉燃燒、環(huán)保除塵、航空、航天等各種工況。當(dāng)含有固體顆粒的氣體作為工作介質(zhì)通過(guò)葉輪時(shí),固體顆粒在運(yùn)動(dòng)中不可避免地與葉輪發(fā)生碰撞、摩擦、反彈、磨損及沉積等問(wèn)題,從而影響葉輪的動(dòng)平衡且危及其可靠性和使用壽命。同時(shí)氣流中的顆粒會(huì)與風(fēng)機(jī)葉片表面發(fā)生碰撞產(chǎn)生沖蝕,導(dǎo)致葉片磨損失效。根據(jù)我國(guó)風(fēng)機(jī)行業(yè)協(xié)會(huì)統(tǒng)計(jì),輸送氣固兩相混合物的風(fēng)機(jī)約占年產(chǎn)量40%,因此研究氣固兩相流風(fēng)機(jī)磨損問(wèn)題具有重要的應(yīng)用價(jià)值和現(xiàn)實(shí)意義。 論文首先闡述了氣固兩相流離心風(fēng)機(jī)葉片磨損機(jī)理,然后介紹了目前國(guó)內(nèi)外在離心風(fēng)機(jī)被動(dòng)防磨和主動(dòng)防磨方面的相關(guān)研究進(jìn)展和最新研究方法。本文利用光學(xué)顯微鏡、掃描電子顯微鏡(SEM)、X射線衍射儀(XRD)、涂鍍層測(cè)厚儀等分析檢測(cè)手段,通過(guò)磨損模擬試驗(yàn)和耐磨性能對(duì)比試驗(yàn),系統(tǒng)研究了含塵離心風(fēng)機(jī)的結(jié)構(gòu)設(shè)計(jì)、葉片材料選擇、微弧氧化工藝優(yōu)化對(duì)葉片磨損行為和葉輪使用壽命的影響,探討了含塵離心風(fēng)機(jī)葉片的磨損機(jī)理與減磨途徑,獲得了以下具有創(chuàng)新性的研究結(jié)果： (1)通過(guò)對(duì)離心風(fēng)機(jī)結(jié)構(gòu)的綜合創(chuàng)新設(shè)計(jì),在葉輪高速旋轉(zhuǎn)時(shí)產(chǎn)生氣體旋流場(chǎng),通過(guò)這個(gè)氣體旋流場(chǎng)完成能量傳遞,使大部分的流體不經(jīng)過(guò)葉輪,達(dá)到減少能量損失以及固體顆粒對(duì)葉輪的碰撞、摩擦、磨損,提高葉輪壽命的目的。試驗(yàn)結(jié)果表明新型離心風(fēng)機(jī)葉片上試樣的耐磨性約為傳統(tǒng)風(fēng)機(jī)的4倍。 (2)通過(guò)優(yōu)選匹配合適的葉片材料和簡(jiǎn)單的熱處理工藝替代現(xiàn)常用的低碳結(jié)構(gòu)鋼,以實(shí)現(xiàn)提高性能、減少磨損或降低成本的目的。試驗(yàn)結(jié)果表明可采用經(jīng)淬火+回火處理的40Cr鋼和45鋼來(lái)替代現(xiàn)在葉片材料常用的Q235(A3鋼)和Q345(16Mn鋼),可增加葉片的耐磨性,提高葉輪使用壽命。 (3)以4A01型鋁合金為研究對(duì)象,通過(guò)微弧氧化工藝在鋁合金葉片上形成一層致密均勻的陶瓷層,達(dá)到提高葉片耐磨、耐蝕性,延長(zhǎng)葉輪使用壽命的目的。研究了不同濃度的電解液對(duì)起弧電壓、陶瓷膜厚度、表面形貌、相組成、耐磨性能的影響,試驗(yàn)結(jié)果表明：電解液為主成膜劑]Na2SiO3+添加劑KOH+性能改善劑H3B03+穩(wěn)定劑甘油,且Na2SiO3濃度為12g/L左右時(shí),陶瓷膜的耐磨性最好。研究了電壓、電流密度對(duì)陶瓷膜層厚度、表面形貌、相組成、耐磨性能的影響,試驗(yàn)結(jié)果表明：正向電壓在450V左右,正向電流密度在12A/dm2左右時(shí),陶瓷膜的耐磨性最好。
[Abstract]:Gas-solid two-phase flow centrifugal fan is widely used in pneumatic conveying, pulverized coal combustion, environmental protection dust removal, aviation, aerospace and other conditions. When the gas containing solid particles passes through the impeller as the working medium, the solid particles will inevitably collide with the impeller in motion, such as friction, rebound, wear and deposition, etc. It affects the dynamic balance of impeller and endangers its reliability and service life. At the same time, the particles in the air flow will collide with the fan blade surface, resulting in the blade wear failure. According to the statistics of China Fan Industry Association, the fan conveying gas-solid two-phase mixture accounts for about 40 percent of the annual output, so it is of great value and practical significance to study the wear problem of gas-solid two-phase flow fan. In this paper, the vane wear mechanism of gas-solid two-phase flow centrifugal fan is first expounded, and then the research progress and the latest research methods on passive and active anti-wear of centrifugal fan at home and abroad are introduced. By means of optical microscope, scanning electron microscope (SEM) X-ray diffractometer, (XRD), coating thickness measuring instrument and so on, the structure design of dust-bearing centrifugal fan is systematically studied by means of wear simulation test and wear resistance contrast test. The influence of blade material selection and micro-arc oxidation process optimization on blade wear behavior and service life of impeller is discussed. The wear mechanism and wear reduction method of centrifugal fan blade with dust are discussed. The following innovative results are obtained: (1) through the comprehensive and innovative design of the centrifugal fan structure, the gas swirl field is produced when the impeller rotates at high speed, and the energy transfer is accomplished through the gas swirl field. Most of the fluids do not pass through the impeller to reduce the energy loss and the impact of solid particles on the impeller friction wear and improve the life of the impeller. The test results show that the wear resistance of the new centrifugal fan blade is about 4 times that of the traditional fan. (2) the commonly used low carbon structural steel is replaced by the suitable blade material and simple heat treatment process. To achieve the purpose of improving performance, reducing wear or cost. The test results show that Q235 (A3 steel) and Q345 (16Mn steel), which are commonly used in blade materials, can be replaced by quenched and tempered 40Cr and 45 steels, and the wear resistance of the blades can be increased. (3) taking 4A01 type aluminum alloy as the research object, a dense and uniform ceramic layer was formed on the blade of aluminum alloy by micro-arc oxidation process, so as to improve the wear resistance and corrosion resistance of the blade. The purpose of prolonging the service life of impeller. The effects of different concentrations of electrolyte on arc starting voltage, ceramic film thickness, surface morphology, phase composition and wear resistance were studied. The experimental results show that the electrolyte is the main film forming agent] KOH additive KOH stabilizer glycerol. When the concentration of Na2SiO3 is about 12g/L, the wear resistance of ceramic film is the best. The effects of voltage and current density on the thickness, surface morphology, phase composition and wear resistance of ceramic film were studied. The experimental results show that the wear resistance of ceramic film is the best when the forward voltage is about 450 V and the forward current density is about 12A/dm2.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH432
[Abstract]:Gas-solid two-phase flow centrifugal fan is widely used in pneumatic conveying, pulverized coal combustion, environmental protection dust removal, aviation, aerospace and other conditions. When the gas containing solid particles passes through the impeller as the working medium, the solid particles will inevitably collide with the impeller in motion, such as friction, rebound, wear and deposition, etc. It affects the dynamic balance of impeller and endangers its reliability and service life. At the same time, the particles in the air flow will collide with the fan blade surface, resulting in the blade wear failure. According to the statistics of China Fan Industry Association, the fan conveying gas-solid two-phase mixture accounts for about 40 percent of the annual output, so it is of great value and practical significance to study the wear problem of gas-solid two-phase flow fan. In this paper, the vane wear mechanism of gas-solid two-phase flow centrifugal fan is first expounded, and then the research progress and the latest research methods on passive and active anti-wear of centrifugal fan at home and abroad are introduced. By means of optical microscope, scanning electron microscope (SEM) X-ray diffractometer, (XRD), coating thickness measuring instrument and so on, the structure design of dust-bearing centrifugal fan is systematically studied by means of wear simulation test and wear resistance contrast test. The influence of blade material selection and micro-arc oxidation process optimization on blade wear behavior and service life of impeller is discussed. The wear mechanism and wear reduction method of centrifugal fan blade with dust are discussed. The following innovative results are obtained: (1) through the comprehensive and innovative design of the centrifugal fan structure, the gas swirl field is produced when the impeller rotates at high speed, and the energy transfer is accomplished through the gas swirl field. Most of the fluids do not pass through the impeller to reduce the energy loss and the impact of solid particles on the impeller friction wear and improve the life of the impeller. The test results show that the wear resistance of the new centrifugal fan blade is about 4 times that of the traditional fan. (2) the commonly used low carbon structural steel is replaced by the suitable blade material and simple heat treatment process. To achieve the purpose of improving performance, reducing wear or cost. The test results show that Q235 (A3 steel) and Q345 (16Mn steel), which are commonly used in blade materials, can be replaced by quenched and tempered 40Cr and 45 steels, and the wear resistance of the blades can be increased. (3) taking 4A01 type aluminum alloy as the research object, a dense and uniform ceramic layer was formed on the blade of aluminum alloy by micro-arc oxidation process, so as to improve the wear resistance and corrosion resistance of the blade. The purpose of prolonging the service life of impeller. The effects of different concentrations of electrolyte on arc starting voltage, ceramic film thickness, surface morphology, phase composition and wear resistance were studied. The experimental results show that the electrolyte is the main film forming agent] KOH additive KOH stabilizer glycerol. When the concentration of Na2SiO3 is about 12g/L, the wear resistance of ceramic film is the best. The effects of voltage and current density on the thickness, surface morphology, phase composition and wear resistance of ceramic film were studied. The experimental results show that the wear resistance of ceramic film is the best when the forward voltage is about 450 V and the forward current density is about 12A/dm2.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH432
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 陳顯明;羅承萍;劉江文;李文芳;;鎂合金微弧氧化熱力學(xué)和動(dòng)力學(xué)分析[J];兵器材料科學(xué)與工程;2006年03期
2 東青;陳傳忠;王德云;雷廷權(quán);;鋁及其合金的微弧氧化技術(shù)[J];中國(guó)表面工程;2005年06期
3 賀子凱,唐培松;電流密度對(duì)微弧氧化膜層厚度和硬度的影響[J];表面技術(shù);2003年03期
4 王永康,鄭宏曄,李炳生,韓高榮,袁禮福;鋁合金微弧氧化溶液中添加劑成分的作用[J];材料保護(hù);2003年11期
5 烏迪;劉向東;呂凱;張雅萍;王曉軍;;丙三醇對(duì)鎂合金微弧氧化過(guò)程及膜層的影響[J];材料保護(hù);2009年02期
6 董剛,張九淵;固體粒子沖蝕磨損研究進(jìn)展[J];材料科學(xué)與工程學(xué)報(bào);2003年02期
7 張岱嵐;白新德;李娟;陳建新;伍志明;朱國(guó)勝;;Zr-Nb合金的微弧陽(yáng)極氧化表面改性[J];稀有金屬材料與工程;2007年06期
8 張欣盟;田修波;鞏春志;楊士勤;;LY12鋁合金微弧氧化膜三維組織結(jié)構(gòu)及占空比影響研究[J];稀有金屬材料與工程;2010年S1期
9 石玉龍,茹鳳虎,彭紅端,謝廣文;鋁材表面的等離子微弧氧化技術(shù)研究[J];電鍍與涂飾;2000年01期
10 梁坤,梁成浩,王華,趙宏娜;鋁及其合金著色技術(shù)的研究進(jìn)展[J];電鍍與涂飾;2005年05期
相關(guān)碩士學(xué)位論文 前10條
1 戈超;離心風(fēng)機(jī)葉片抗沖蝕磨損仿生研究[D];吉林大學(xué);2011年
2 劉培宇;鋁合金微弧氧化陶瓷層的制備及其耐蝕性的研究[D];燕山大學(xué);2011年
3 彭峰;離心風(fēng)機(jī)三維數(shù)值計(jì)算與研究[D];武漢理工大學(xué);2004年
4 梅丹;離心風(fēng)機(jī)葉輪內(nèi)氣固兩相流動(dòng)及葉片磨損研究[D];武漢科技大學(xué);2006年
5 杜廣建;鋁合金微弧氧化裝飾/耐磨多功能涂層制備工藝研究[D];武漢理工大學(xué);2006年
6 王遠(yuǎn);鋁合金表面微弧氧化陶瓷膜及改性層的摩擦學(xué)性能研究[D];南京航空航天大學(xué);2007年
7 劉榮明;鋁合金微弧氧化工藝研究與機(jī)理分析[D];內(nèi)蒙古工業(yè)大學(xué);2007年
8 林愛(ài)暉;旋轉(zhuǎn)風(fēng)幕排風(fēng)罩?jǐn)?shù)值模擬與實(shí)驗(yàn)研究[D];湖南科技大學(xué);2007年
9 張s，
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