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class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="3sw3gy8" 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="aoldv77" 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(guān)鍵詞：</span>浙江水泵密封規(guī)格型號,封</p><p><span>***更新：</span>2020-06-12 21:27:27</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="m3zmebd" 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="yiasubd" class="page-proshow02"><p class="title">詳細說明</p><div id="qv8vifw" class="box"><p><p> 強酸強堿介質(zhì)具有較強的腐蝕性，且易結(jié)晶，為了防止介質(zhì)對密封彈性元件的腐蝕，應(yīng)使彈性元件與介質(zhì)隔離，采用外裝結(jié)構(gòu)，第3 種布置方式(背靠背或面對面)。O 形圈材料選用耐腐蝕的氟橡膠或全氟橡膠。動靜環(huán)選用硬對硬(碳化鎢或碳化硅)配置。 </p> <p> 強酸強堿泵現(xiàn)場大多采用單端面密封，因而密封背面大多出現(xiàn)結(jié)晶結(jié)垢，對設(shè)備造成腐蝕等現(xiàn)象。為了避免該現(xiàn)象發(fā)生，使現(xiàn)場更加清潔，可直接選用PLAN54(見圖4)。煉油裝置中大多數(shù)酸泵或堿泵的入口壓力較低，基本為常壓，因此PLAN54 的沖洗源可直接用循環(huán)水。該方案雖然選用了雙端面密封，但從經(jīng)濟角度考慮*增加了一對摩擦副，沒有另外增加輔助系統(tǒng)，既節(jié)約了投資成本又滿足了現(xiàn)場要求。操作中，浙江水泵密封規(guī)格型號，因抽空、氣蝕，浙江水泵密封規(guī)格型號、憋壓等異常現(xiàn)象，浙江水泵密封規(guī)格型號，引起較大的軸向力，使動、靜環(huán)接觸面分離。浙江水泵密封規(guī)格型號</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江水泵密封規(guī)格型號,封" src="https://tyunfile.71360.com/UploadFile/lscmjx/637245503162724609/640384.jpg"></div><p> </p> <p> 一般情況下，介質(zhì)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(dǎo)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，使密封失效；(4)高溫會加劇金屬材料的腐蝕，縮短機封的使用壽命。浙江水泵密封規(guī)格型號機械密封按工作條件和介質(zhì)性質(zhì)的不同，有耐高溫、耐低溫機械密封，耐高壓、耐腐蝕機械密封等。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江水泵密封規(guī)格型號,封" src="https://tyunfile.71360.com/UploadFile/lscmjx/637247293380048828/7808572.jpg"></div><p> 液態(tài)烴介質(zhì)是一種低溫液化氣體,具有低沸點、低黏度、高蒸氣壓等特性。在這種工況下使用的機械密封，密封件材料會出現(xiàn)冷脆性，大氣中的水氣會在密封裝置的大氣側(cè)面上凍結(jié)，摩擦副端面液膜容易氣化等。尤其是當介質(zhì)稍有泄漏，漏出的液態(tài)烴在大氣側(cè)立即氣化，帶走大量的熱，機械密封環(huán)境溫度急劇下降，一般的密封材料，如橡膠或聚四氟乙烯普遍變脆，導(dǎo)致密封失效，泄漏增大。 </p> <p> <br /> </p> <p> 根據(jù)實際經(jīng)驗,使用金屬波紋管機械密封比較好,主要表現(xiàn)在用金屬波紋管和柔性石墨代替輔助密封圈,解決了密封圈材料發(fā)生冷脆而失彈及緩沖作用的問題,如用DBM型、YH604/606/609型等。在液態(tài)烴泵上使用波紋管機械密封時應(yīng)注意: </p> <p> 金屬波紋管材料選用耐低溫、韌性好的Hastelloy-C(耐熱鎳基金),AM350,Carpenter20 等; </p> <p> 合理的結(jié)構(gòu)設(shè)計能保證機械密封在高速運轉(zhuǎn)的情況下不破壞密封端面和波紋管組件; </p> <p> 合理的端面接觸比壓能保證機械密封的密封性能和避免過早的失效; </p> <p> 合理的摩擦副材料能保證機械密封在低溫條件下正常的摩擦性能和密封性能, 避免因磨損過快而過早的失效; </p><p> 泵用機械密封是精密的部件，制造精度及安裝精度要求都很嚴格，如果裝配不當就會影響密封性能，要正確安裝必須注意以下幾點： </p> <p> 泵用機械密封的冷卻和沖洗 </p> <p> 第一種冷卻形式由水泵的出口或高壓端，將輸送的干凈介質(zhì)，直接沖洗密封端面，然后進入泵腔內(nèi)，通過介質(zhì)的不斷循環(huán)，將磨擦端面的的磨擦熱帶走達到冷卻的效果。 </p> <p> 第二種冷卻方式在第一種冷卻形式的基礎(chǔ)上在靜環(huán)的背部增加一冷卻水套，冷卻效果有所改善，并可以沖洗，收集泄露出來的液體。當密封介質(zhì)溫度＞150℃時除了在冷卻水套中通過冷卻水及靜環(huán)背部冷卻外，應(yīng)采取強制冷卻措施。即從泵出口的干凈介質(zhì)應(yīng)預(yù)先經(jīng)熱交換器冷卻至50℃時。再進入密封腔冷卻沖洗，該形式是冷卻效果**良好的一種。 </p> <p> 如介質(zhì)中含有顆?；螂s質(zhì)，必須采用過濾措施，把常溫干凈沖洗液輸入密封腔內(nèi)。泵在停一段時間后再啟動時泄漏，因為摩擦副附近介質(zhì)的凝固、結(jié)晶，摩擦副上有水垢、彈簧腐蝕、阻塞而失彈。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江水泵密封規(guī)格型號,封" src="https://tyunfile.71360.com/UploadFile/lscmjx/637247293743222656/8640266.jpg"></div><p> 內(nèi)密封和外密封 </p> <p> **通常的做法是將密封安裝在填料盒的內(nèi)部。但這種做法要求在密封維修時將液泵的濕端拆卸下來，其主要好處是密封的環(huán)境衛(wèi)生易于控制。 </p> <p> <span style="font-size:12px;"> 外密封的安裝方式是將靜態(tài)密封面的方向顛倒過來，主軸上的旋轉(zhuǎn)單元位于填料盒壓蓋的外面。外密封主要具有以下五大好處：</span> </p> <p> 安裝容易; </p> <p> 費用相對較低; </p> <p> 可以連續(xù)監(jiān)控和清潔; </p> <p> 適于無法在內(nèi)部安裝密封的很小填料盒; </p> <p> 由于其位置接近軸承，對主軸偏差的困難影響較少。 </p> <p> <span style="font-size:12px;"> 其主要缺點是離心力會將固體顆粒從密封的下面甩向密封的接觸面上。因此，這類密封主要適用于清潔且不含有磨料的液體。</span> </p> <p> <span style="font-size:12px;"> 近年來，分離式密封已成為外密封中的另一重要附加特性。分離式密封是一個成套總成，安裝于填料盒與軸承套之間，采用這種設(shè)計，在密封需要更換時，不需要每次都拆卸液泵。這類密封結(jié)合探討其他設(shè)計標準正在逐步開發(fā)之中。由于這種設(shè)計易于更換密封，因此應(yīng)抵擋**只更換密封件的這種誘惑，而對出現(xiàn)故障的根源不做進一步的調(diào)查，這一點非常重要。</span> </p> <p> <br /> 泵用機械密封經(jīng)過靜試后，運轉(zhuǎn)時高速旋轉(zhuǎn)產(chǎn)生的離心力，會阻擋介質(zhì)的泄漏。淮安計量泵密封哪家比較好</p><p style="text-indent:25px">熱裂是高溫油泵，如油渣泵、回?zé)捰捅?、常減壓塔底泵等**常見的失效現(xiàn)象。浙江水泵密封規(guī)格型號</p><p> 低溫輕烴泵用機械密封 </p> <p> 多彈簧機械密封采用靜止結(jié)構(gòu)。 </p> <p> 采取增加非補償環(huán)尾部長度和采用副后蓋結(jié)構(gòu)等措施，增加輕烴泵機械密封的抗抽空能力。 </p> <p> 采用靜環(huán)背冷措施。 </p> <p> 對介質(zhì)易汽化的輕烴泵軸封我們增設(shè)背部冷卻,在軸封正常操作時,可對端面溫度進行調(diào)節(jié),使相變半徑靠近內(nèi)徑,增大液膜比例。在泵抽空時,由于端面溫度降低,使閃蒸壓力降低,對防止端面分離有積極作用。 </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“SiC-C”結(jié)構(gòu)。輔助密封材料選擇耐低溫的硅橡膠材料。 </p> <p> 采用自沖洗措施。 </p> <p> 通過沖洗來提高密封腔壓力以防止抽空造成的密封干摩擦。自沖洗措施不*可保證密封腔內(nèi)有較高的介質(zhì)壓力,避免介質(zhì)在密封腔內(nèi)汽化或氣體積聚,而且還可把摩擦副產(chǎn)生的摩擦熱及時帶走,有效控制密封端面溫升,增大液相面積,改善摩擦狀態(tài)。浙江水泵密封規(guī)格型號</p><p style="text-indent:25px">漣水創(chuàng)密機械制造有限公司創(chuàng)立于2014-07-02，是一家貿(mào)易型公司。公司自成立以來，以質(zhì)量為發(fā)展，讓匠心彌散在每個細節(jié)，公司旗下[ "輕型密封", "中型密封", "重型密封", "小型水泵" ]深受客戶的喜愛。公司將不斷增強企業(yè)核心競爭力，努力學(xué)習(xí)行業(yè)先進知識，遵守行業(yè)規(guī)范，植根于機械及行業(yè)設(shè)備行業(yè)的發(fā)展。截止當前，我公司年營業(yè)額度達到700-1000萬元，爭取在一公分的領(lǐng)域里做出一公里的深度。</p></p><br /><p>文章來源地址: 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