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href="http://m.cdcfah.com/zx/"><span>新聞資訊</span></a></li><li id = "index_article"><a href="http://m.cdcfah.com/xw/"><span>行業(yè)資訊</span></a></li><li id = "index_show"><a href="http://m.cdcfah.com/zh/"><span>展會信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="pjg2goa" class="twoCol"><div id="etl4hov" class="page-proshow clearfix"><p class="current"> 當前位置:<a href="http://m.cdcfah.com/">首頁?<a href="http://m.cdcfah.com/cp/">產品供應</a>?<a href="http://m.cdcfah.com/cp/first-_jxjxysb/">機械及行業(yè)設備</a>?<a href="http://m.cdcfah.com/cp/second-jxjxysb_bengtc/">泵</a>?<a href="http://m.cdcfah.com/cp/third-bengtc_bpjwp/">泵配件</a>?麗水多級泵密封批發(fā)廠歡迎來電漣水創(chuàng)密機械供應</p><div id="wlimtac" class="leftbox clearfix"><h1>麗水多級泵密封批發(fā)廠歡迎來電漣水創(chuàng)密機械供應</h1><div id="cw3khjq" class="proBig"><div id="32yeb84" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/lscmjx/637247296977294922/7112794.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="xbi9eln" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/lscmjx/637247296977294922/7112794.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="et3phz2" 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>產品關鍵詞：</span>麗水多級泵密封批發(fā)廠</p><p><span>***更新：</span>2020-06-06 11:18:46</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="g7e8f7i" 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)高揚民營經濟產業(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="qkh4nfj" class="page-proshow02"><p class="title">詳細說明</p><div id="ml3xurd" class="box"><p><p> 低溫下的機械密封 </p> <p> 在煉油化工裝置中，低溫輸送的介質一般都具有豁度小、潤滑性差、容易氣化的特點，而且介質在氣化時大量吸熱，使周圍溫度急劇下降，造成空氣中水氣的凝結，導致端面及其周圍結冰，使端面貼合不嚴引起泄漏。同時，因潤滑性差，端面摩擦產生的熱量較多，若不能及時轉移，必然會加劇端面處的氣化，造成惡性循環(huán)，加速密封面的早期失效。另外，低溫密封的輔助密封圈在低溫下發(fā)硬失彈也容易導致泄漏。 </p> <p> <span style="font-size:12px;">對低溫密封，除了選擇合適的輔助密封圈材質外，還要注意以下幾點。</span> </p> <p> 改進密封結構及正確選擇摩擦副材料。實踐證明，在靜環(huán)表面開圓弧形凹槽可形成流體動力密封，增加流體膜承載能力，改善端面潤滑條件，有效延長機封工作壽命。在端面配對方面，麗水多級泵密封批發(fā)廠，碳化鎢一M106K石墨組對（即動、靜環(huán)材料）一般要優(yōu)于其他材料，因為其潤滑性好，摩擦系數(shù)低，導熱性也比較好，麗水多級泵密封批發(fā)廠。 </p> <p> 選擇合適的端面比壓，麗水多級泵密封批發(fā)廠。低溫密封由于端面潤滑性差，容易發(fā)生氣化、結冰，所以在保證密封可靠的前提下，端面比壓可適當減小。一般機械密封比壓值推薦為0.29-0.59MPa，對低溫密封可取其下限。對金屬波紋管機械密封，由于動環(huán)沒有軸向摩擦，端面比壓甚至可以低于下限。 </p> <p> <br /> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="麗水多級泵密封批發(fā)廠" src="https://tyunfile.71360.com/UploadFile/lscmjx/637247296977294922/7112794.jpg"></div><p> 高溫熱水泵一般為介質溫度高于100 °C，在密封突然失效泄漏之后會噴出大量蒸汽，對人體造成傷害。主要為鍋爐給水泵、循環(huán)水泵、凝結水泵等。 </p> <p> 為了不因選用串聯(lián)密封而增加成本，又能使高溫熱水泵安全可靠運行，建議選用單端面機械密封，沖洗方案可以選擇PLAN23+62。PLAN62 所通急冷液直接從23 冷卻器后引旁路連接至密封急冷口，具體流程見圖3 所示?？梢钥闯?，通過此種布置方式， PLAN62 不需要額外的配管將循環(huán)水引入密封急冷口，又能起到在密封失效時降低介質溫度，從而避免對人員的傷害，對系統(tǒng)加以保護。 </p> <p> <br /> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="麗水多級泵密封批發(fā)廠" src="https://tyunfile.71360.com/UploadFile/lscmjx/637247293635341797/9903144.jpg"></div><p style="text-indent:25px">液態(tài)烴介質是一種低溫液化氣體，具有低沸點、低粘度、高蒸汽壓等特性。在這種工況下應用的機械密封，會使密封材料出現(xiàn)冷脆性，大氣中的水汽會在密封裝置的大氣側面上凍結，摩擦副端面液膜容易汽化等。尤其是當介質稍有泄漏，漏出的液態(tài)烴在大氣側立即汽化，帶走大量熱，機械密封環(huán)境溫度急劇下降，使用一般的密封材料，如橡膠或聚四氟乙烯普遍變脆，導致密封失效，泄漏增大而不可收拾。有些企業(yè)采用雙端面l機械密封，在介質和大氣端設一隔離室，其間通以封油以緩和低溫的影響。但這種結構復雜且需配封液系統(tǒng)。據經驗，使用波紋管機械密封比較好，主要表現(xiàn)在用屬波紋管和柔性石墨代并輔助密封圈，解決了密封圈材料發(fā)生冷脆而失彈及緩沖作用的問題，如DBM型、YH604/606/609型等。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="麗水多級泵密封批發(fā)廠" src="https://tyunfile.71360.com/UploadFile/lscmjx/637247293837011719/358206.jpg"></div></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/168158.html</p></div></div></div></div></div><div id="h3fug2o" class="page-right twoColRt"><div id="84ipmoq" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="hgynf2g" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/814588.html"><div><img 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