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id="r8qsuw4" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/lscmjx/637245503162724609/640384.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="jldvs2m" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/lscmjx/637245503162724609/640384.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="wlxzbic" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關鍵詞：</span>南京管道泵密封廠,封</p><p><span>***更新：</span>2020-10-09 21:08:32</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="hgia7te" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">漣水創(chuàng)密機械制造有限公司</a></p><p><span>聯(lián)系人：</span>袁經(jīng)理</p><p><span>郵箱: </span>lscmjx@163.com</p><p><span>電話: </span>15250888877</p><p><span>傳真: </span>153_</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>153-66621921</p><p><span>地址: </span>高溝鎮(zhèn)高揚民營經(jīng)濟產(chǎn)業(yè)園</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="35iav8c" class="page-proshow02"><p class="title">詳細說明</p><div id="jiur8xz" class="box"><p><p> </p> <p> 一般情況下，介質的溫度超過120℃即認為是高溫密封。此時機械密封存在的主要問題有：(1)由于摩擦副端面溫度升高，導致密封端面間液膜氣化，摩擦系數(shù)隨之增大，磨損加劇，溫升加大，密封環(huán)產(chǎn)生熱變形或熱裂而失效；(2)機械密封中的輔助密封圈材料一般為橡膠或聚四氟乙烯，由于長時間在高溫環(huán)境中，容易老化和分解，造成密封失效；(3)高溫下機械密封的彈性元件易產(chǎn)生疲勞和蠕變，南京管道泵密封廠，使密封失效；(4)高溫會加劇金屬材料的腐蝕，南京管道泵密封廠，縮短機封的使用壽命。操作中，因抽空、氣蝕、憋壓等異?，F(xiàn)象，南京管道泵密封廠，引起較大的軸向力，使動、靜環(huán)接觸面分離。南京管道泵密封廠</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京管道泵密封廠,封" src="https://tyunfile.71360.com/UploadFile/lscmjx/637245503162724609/640384.jpg"></div><p> 機械密封的密封環(huán)之間應有一層液體薄膜，具有下列三個作用： </p> <p> 支持密封受到的大部分水壓負荷。 </p> <p> 作為潤滑劑，減少密封環(huán)生成的摩擦熱。 </p> <p> 使粗糙接觸**小化，從而降低磨損率。 </p> <p> 作為傳熱介質，轉移密封環(huán)直接區(qū)域的熱能。 </p> <p> 首先我們要研究密封失效的原因，根據(jù)我的經(jīng)驗，有如下： </p> <p> 生產(chǎn)上的缺點； </p> <p> 設計上的缺點； </p> <p> 缺少培訓/技術； </p> <p> 在我們拆卸機械密封的之前，我們先要想好以下幾點： </p> <p> 主要的泄漏在哪里? </p> <p> 在外部件上是否有碎片？ </p> <p> 是否觀察到軸或旋轉的密封部件有偏心現(xiàn)象？ </p> <p> 有否與系統(tǒng)相關的震動/噪音（如氣穴，接合錯位）？ </p> <p> 在“泵”或密封是否存在局部的熱生成？ </p> <p> 在不同的情況下泄漏是否是間歇的，如在不同的溫度下？ </p> <p> 屬何種泄漏，噴射，小滴，水流或流往管道？ </p> <p> 軸承是否有軸向間隙？ </p> <p> 如果是雙端面密封，則檢查隔離液供應是否完好。 </p> <p> 密封在軸上的相對位置？ </p> <p> <br /> 南京葉輪泵密封銷售廠家泄漏通道也可同時存在，但一般有主次區(qū)別，只要觀察細致，熟悉結構，一定能正確判斷。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京管道泵密封廠,封" src="https://tyunfile.71360.com/UploadFile/lscmjx/637247293279589844/7625641.jpg"></div><p> 填料密封的原理 </p> <p> 在機械行業(yè)中填料密封主要用作動密封,常用作離心泵、壓縮機、真空泵、攪拌機的轉軸密封。填料裝入填料腔以后,經(jīng)壓蓋螺絲對它作軸向壓縮,當軸與填料有相對運動時,由于填料的塑性,使它產(chǎn)生徑向力,并與軸緊密接觸。與此同時,填料中浸漬的潤滑劑被擠出,在接觸面之間形成油膜。由于接觸狀態(tài)并不是特別均勻的,接觸部位便出現(xiàn) </p> <p> 邊界潤滑狀態(tài),稱為”軸承效應”;而未接觸的凹部形成小油槽,有較厚的油膜,接觸部位與非接觸部位組成一道不規(guī)則的迷宮,起阻止液流泄漏的作用,此稱”迷宮效應”。這就是填料密封的機理。良好的密封在于維持“軸承效應”和”迷宮效應”。也就是說,要保持良好的潤滑和適當?shù)膲壕o，若潤滑不良,或壓得過緊都會使油膜中斷,造成填料與軸之間出現(xiàn)干摩擦,而后導致燒軸和出現(xiàn)嚴重磨損。因此,我們需要經(jīng)常對填料的壓緊程度進行調節(jié),使填料中的潤滑劑在運行一段時間而有所流失之后,再擠出一些潤滑劑,同時補償填料因體積變化所造成的壓緊力松弛。當然這樣經(jīng)常擠壓填料,而后將使浸漬劑枯竭,所以定期更換填料是必要的。此外,為了維持液膜和帶走摩擦熱,有意讓填料處有少量泄漏也是必要的。 </p><p> 為了充分發(fā)揮油封的功能，必須根據(jù)使用條件選定**合適的型式與材料。這里就主要的影響因素作一簡述。 </p> <p> <span style="font-size:12px;">軸的表面線速度：在同一直徑條件下，不同材料制造的油封，適應軸面旋轉線速度的能力不同，其關系如下圖所示。油封使用的線速度范圍一般小于15m/s, 滿意的潤滑和良好的散熱條件才是決定性因素。相應較低的數(shù)據(jù)，適用于更為苛刻的條件。 </span> </p> <p> <span style="font-size:12px;">溫度：由于旋轉軸表面與油封的密封唇部產(chǎn)生摩擦，所以密封唇口部的溫度高于油液中的溫度，一般油封工作時其唇緣的溫度高于工作介質溫度20~50℃。隨著轉速增高，壓力增加密封唇口處的溫度也隨之上升。另外，帶有防塵唇的油封，比無防塵唇的油封會出現(xiàn)高于20℃的過高溫度。當超過容許溫度時會縮短油封的工作壽命，造成密封唇過早長久性硬化，以及磨損加大。油封的工作溫度范圍與油封使用的材料有關：材料為丁晴橡膠（NBR）時為-40~120℃，亞力克橡膠（ACM）-30~180℃，氟橡膠（FPM）-25~300℃。</span> </p> <p> <span style="font-size:12px;">壓力：油封主要用于無壓或者在微壓的條件下使用，比較大工作壓力0.02～0.05Mpa。當工作壓力超過這個值時應選用耐壓型油封。</span> </p> <p> <br /> 機械密封的工作溫度不能超過其規(guī)定值。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京管道泵密封廠,封" src="https://tyunfile.71360.com/UploadFile/lscmjx/637247297555068359/2614045.jpg"></div><p> 高溫熱油泵主要有常底泵、減底泵、催化油漿泵，該類泵的特點是溫度高（370℃-400℃）、油品粘度大、塔底有雜質。我們針對高溫泵的這些特點采用的是YH-609系列機械密封, 結構選型主要結合了以下幾個方面: </p> <p> 金屬波紋管旋轉結構 </p> <p> 旋轉波紋管密封在旋轉離心力作用下可以自身清洗波紋管，減少波紋管**沉積和內側結焦，并能防止因急冷造成的波紋管變形。泵類設備轉速一般為2950r/min，機械密封線速度遠小于25m/s,因此，可以選用旋轉結構。 </p> <p> 密封結構形式采用開槽斜面擠緊軸套 </p> <p> 這種定位傳動可靠，安裝拆卸方便且不傷軸。并設置有限位板，便于泵外調整密封的壓縮量。波紋管內徑一處設一45℃斜角，以分散應力，延長波紋管壽命。輔助密封采用柔性石墨替代合成橡膠，可以承受高達425℃的高溫。 </p> <p> 摩擦副材料的選取 </p> <p> 對摩擦副材料的選取我們采用“硬對硬”結構，起初動靜環(huán)我們選擇了SiC-WC，但是運轉一段時間發(fā)現(xiàn)動環(huán)出現(xiàn)肯邊現(xiàn)象。改用YG6-YG6之后，設備運轉一直正常。 </p> <p> <br /> 在對該設備進行維護的過程中，也應明確彈簧的旋向，一旦出現(xiàn)安裝錯誤，將很容易造成泄漏問題。浙江化工泵密封中間商</p><p style="text-indent:25px">根據(jù)密封腔體壓力，確定密封結構采用平衡型或非平衡型，單端面或雙端面等。南京管道泵密封廠</p><p> 正確選擇機械密封是防止液泵泄漏關鍵 </p> <p> <br /> </p> <p> 100多年來，人們采用填料一類的多種密封材料，使液體從液泵殼體沿著主軸的向外泄漏量不斷減少。盡管現(xiàn)代工藝流程中采用的液泵，仍然較大程度地沿用**古老的密封設計——填料盒，因為其起步費用低，而且又為工廠的工作人員所熟悉。 </p> <p> 然而，由于環(huán)境問題的關系，采用填料密封的方法已逐漸不能被人們所接受，特別是針對現(xiàn)代工藝流程中比較普遍的、腐蝕性較強的液體而言。因此，在實際應用中，以機械密封代替填料密封的情況越來越多。 </p> <p> <br /> 南京管道泵密封廠</p><p style="text-indent:25px">漣水創(chuàng)密機械制造有限公司位于江蘇省淮安市漣水縣高溝鎮(zhèn)高揚民營經(jīng)濟產(chǎn)業(yè)園。公司業(yè)務涵蓋輕型密封，中型密封，重型密封，小型水泵等，價格合理，品質有保證。公司秉持誠信為本的經(jīng)營理念，在機械及行業(yè)設備深耕多年，以技術為先導，以自主產(chǎn)品為重點，發(fā)揮人才優(yōu)勢，打造機械及行業(yè)設備良好品牌。創(chuàng)密機械制造秉承“客戶為尊、服務為榮、創(chuàng)意為先、技術為實”的經(jīng)營理念，全力打造公司的重點競爭力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1486356.html</p></div></div></div></div></div><div id="34fcugv" class="page-right twoColRt"><div id="sqxjgi7" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="bkm778x" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應</p></a></div><div id="ifhjgic" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img 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