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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="ih1jqqz" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shhanshang/637408580161602358/1561140.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="umhw3uo" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>凝汽式汽輪機(jī)背壓式汽輪維修,汽輪機(jī)</p><p><span>***更新：</span>2020-12-29 08:23:42</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="tl1kdbb" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海含商建設(shè)工程有限公司</a></p><p><span>聯(lián)系人：</span>朱瑩</p><p><span>郵箱: </span>Irene_zy516@163.com</p><p><span>電話: </span>13918191286</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://shhanshang.shop.88360.com</p><p><span>手機(jī): </span>021-58210069</p><p><span>地址: </span>上海市崇明區(qū)新河鎮(zhèn)新申路921弄2號(hào)L區(qū)228室(上海富盛經(jīng)濟(jì)開(kāi)發(fā)區(qū))</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="ehr0ha8" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="wk180wj" class="box"><p><p style="text-indent:25px">汽輪機(jī)檢修加工會(huì)遇到哪些難題呢?平時(shí)廠家在針對(duì)汽輪機(jī)內(nèi)部結(jié)構(gòu)“口小肚子大”、加工空間小且軸承檔內(nèi)各尺寸精度要求高的問(wèn)題：工件結(jié)構(gòu)，汽輪機(jī)為我公司設(shè)計(jì)的一款汽輪機(jī)，此臺(tái)汽輪機(jī)前汽缸為鑄件，前汽缸與前軸承座是通過(guò)下半的半圓坡口焊接連接，并且該工件總長(zhǎng)有2m，內(nèi)徑小處*有φ 235mm，加工空間很小，而且軸承座各檔內(nèi)圓的尺寸精度要求很高，凝汽式汽輪機(jī)背壓式汽輪維修，對(duì)于加工及檢驗(yàn)測(cè)量是一個(gè)很大的挑戰(zhàn)。加工難點(diǎn)分析，在圖樣的消化過(guò)程中，我們發(fā)現(xiàn)了在汽輪機(jī)加工時(shí)可能出現(xiàn)的問(wèn)題與難點(diǎn)如下：前汽缸與前軸承座通過(guò)下半的半圓坡口焊接連接，如何保障焊接精度？如何控制焊接變形量？前汽缸與前軸承座焊接完后整體工件長(zhǎng)度有2m，其中前汽封小內(nèi)圓只有φ235mm，而軸承檔部分要將車刀穿過(guò)小內(nèi)圓來(lái)加工，軸承檔大內(nèi)圓為φ359mm，造成了“口小肚子大”的情況，而且軸承檔內(nèi)各尺寸精度要求很高，凝汽式汽輪機(jī)背壓式汽輪維修，凝汽式汽輪機(jī)背壓式汽輪維修，公差小處*為0.03mm。汽輪機(jī)蒸汽在靜葉和動(dòng)葉中都膨脹的反動(dòng)式汽輪機(jī)。凝汽式汽輪機(jī)背壓式汽輪維修</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="凝汽式汽輪機(jī)背壓式汽輪維修,汽輪機(jī)" src="https://tyunfile.71360.com/UploadFile/shhanshang/637408580161602358/1561140.png"></div><p style="text-indent:25px">套裝轉(zhuǎn)子在高溫下，葉輪與主軸易發(fā)生松動(dòng)，所以不宜作為高溫汽輪機(jī)的高壓轉(zhuǎn)子。整鍛轉(zhuǎn)子：葉輪、軸封套、聯(lián)軸節(jié)等部件與主軸是由一整鍛件削而成，無(wú)熱套部分，這解決了高溫下葉輪與軸連接容易松動(dòng)的問(wèn)題。這種轉(zhuǎn)子常用于大型汽輪機(jī)的高、中壓轉(zhuǎn)子。結(jié)構(gòu)緊湊，對(duì)啟動(dòng)和變工況適應(yīng)性強(qiáng)，宜于高溫下運(yùn)行，轉(zhuǎn)子剛性好，但是鍛件大，加工工藝要求高，加工周期長(zhǎng)，大鍛件質(zhì)量難以保證。焊接轉(zhuǎn)子：汽輪機(jī)低壓轉(zhuǎn)子質(zhì)量大，承受的離心力大，采用套裝轉(zhuǎn)子時(shí)葉輪內(nèi)孔在運(yùn)行時(shí)將發(fā)生較大的彈性形變，因而需要設(shè)計(jì)較大的裝配過(guò)盈量，但這會(huì)引起很大的裝配應(yīng)力，若采用整鍛轉(zhuǎn)子，質(zhì)量難以保證，所以采用分段鍛造、焊接組合的焊接轉(zhuǎn)子。凝汽式汽輪機(jī)背壓式汽輪維修汽輪機(jī)采用鑄造結(jié)構(gòu)或由簡(jiǎn)單鑄件、型鋼及鋼板焊接的焊接結(jié)構(gòu)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="凝汽式汽輪機(jī)背壓式汽輪維修,汽輪機(jī)" src="https://tyunfile.71360.com/UploadFile/shhanshang/637408580784483211/2700379.png"></div><p style="text-indent:25px">汽輪機(jī)在安裝或檢修的過(guò)程中，由于檢修工藝和檢修技術(shù)的原因，使內(nèi)缸、汽缸隔板、隔板套及汽封套的膨脹間隙不合適，或是掛耳壓板的膨脹間隙不合適，運(yùn)行后產(chǎn)生巨大的膨脹力使汽缸變形。使用的汽缸密封劑質(zhì)量不好、雜質(zhì)過(guò)多或是型號(hào)不對(duì)；汽缸密封劑內(nèi)若有堅(jiān)硬的雜質(zhì)顆粒就會(huì)使密封面難以緊密的結(jié)合。汽缸螺栓的緊力不足或是螺栓的材質(zhì)不合格。汽缸結(jié)合面的嚴(yán)密性主要靠螺栓的緊力來(lái)實(shí)現(xiàn)的。機(jī)組的起?；蚴窃鰷p負(fù)荷時(shí)產(chǎn)生的熱應(yīng)力和高溫會(huì)造成螺栓的應(yīng)力松弛，如果應(yīng)力不足，螺栓的預(yù)緊力就會(huì)逐漸減小。如果汽缸的螺栓材質(zhì)不好，螺栓在長(zhǎng)時(shí)間的運(yùn)行當(dāng)中，在熱應(yīng)力和汽缸膨脹力的作用下被拉長(zhǎng)，發(fā)生塑性變形或斷裂，緊力就會(huì)不足，使汽缸發(fā)生泄漏的現(xiàn)象。</p><p style="text-indent:25px">早期汽輪機(jī)所用新蒸汽壓力和溫度都較低，熱效率低于20％。隨著單機(jī)功率的提高，30年代初新蒸汽壓力已提高到3～4兆帕，溫度為400～450℃。隨著高溫材料的不斷改進(jìn)，蒸汽溫度逐步提高到535℃，壓力也提高到6～12.5兆帕，個(gè)別的已達(dá)16兆帕，熱效率達(dá)30％以上。50年代初，已有采用新蒸汽溫度為600℃的汽輪機(jī)。以后又有新蒸汽溫度為650℃的汽輪機(jī)。現(xiàn)代大型汽輪機(jī)通常采用新汽壓力24兆帕，新汽溫度和再熱溫度為535～565℃的超臨界參數(shù)，或新汽壓力為16.5兆帕、新汽溫度和再熱溫度為535℃的亞臨界參數(shù)。使用這些汽輪機(jī)的電站熱效率約為40％。汽輪機(jī)汽缸上半可作為一個(gè)零件起吊。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="凝汽式汽輪機(jī)背壓式汽輪維修,汽輪機(jī)" src="https://tyunfile.71360.com/UploadFile/shhanshang/637408580466397141/2626342.png"></div><p style="text-indent:25px">采用凝汽式余熱發(fā)電汽輪機(jī)系統(tǒng)。該發(fā)電系統(tǒng)可以充分利用416～120度的廢氣，具有良好的熱利用率和發(fā)電效率。引起調(diào)節(jié)級(jí)壓力異常汽輪機(jī)檢修分析原因，人們通常把汽輪機(jī)的第1級(jí)叫做調(diào)節(jié)級(jí)，也稱速度級(jí)。在結(jié)構(gòu)上，它通常比其它壓力級(jí)直徑大。普遍的應(yīng)用到各行各業(yè)，接下來(lái)汽輪機(jī)檢修：儀表的指示不準(zhǔn)。汽輪機(jī)通流部分積鹽或者葉片變形損壞導(dǎo)致的通流面積減小。在負(fù)荷不變的情況下，各種原因?qū)е碌闹髡羝髁康漠惓?，從而反映在調(diào)節(jié)級(jí)壓力上。主機(jī)超負(fù)荷的運(yùn)行。沖動(dòng)式汽輪機(jī)蒸汽主要在靜葉中膨脹，在動(dòng)葉中只有少量的膨脹。山東汽輪機(jī)設(shè)備檢修</p><p style="text-indent:25px">亞臨界壓力汽輪機(jī)：主蒸汽壓力在15.69—17.65Mpa。凝汽式汽輪機(jī)背壓式汽輪維修</p><p style="text-indent:25px">開(kāi)啟汽輪機(jī)，察看是否有零件損壞，核實(shí)設(shè)備名稱、規(guī)格型號(hào)與訂購(gòu)合同是否相符。找出裝箱單、合格證及設(shè)備說(shuō)明書(shū)。檢查外觀有無(wú)生銹和掉漆部位。按裝箱單和汽輪機(jī)說(shuō)明書(shū)清點(diǎn)設(shè)備及附屬零部件，同時(shí)要清點(diǎn)登記。清洗后涂一層潤(rùn)滑油存放。做好汽輪機(jī)的驗(yàn)收工作，主要是做好這些工作，另外在驗(yàn)收的過(guò)程中一定要檢查一下設(shè)備的一些配件是否齊全，發(fā)現(xiàn)不全立刻通知廠家。必要的保養(yǎng)工作還是需要做的。汽輪機(jī)發(fā)電效率高，有著很強(qiáng)的效率，加上使用它的過(guò)程中基本上能耗很少，因此在很多廠子中使用它的頻率比較高。凝汽式汽輪機(jī)背壓式汽輪維修</p><p 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