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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>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>淮安計(jì)量泵密封批量采購(gòu),封</p><p><span>***更新：</span>2020-06-14 19:20:53</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="leam2ch" 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(jī)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(jī): </span>153-66621921</p><p><span>地址: </span>高溝鎮(zhèn)高揚(yáng)民營(yíng)經(jīng)濟(jì)產(chǎn)業(yè)園</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="kdpb9gx" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="ecj38hn" class="box"><p><p> 離心泵用機(jī)械密封檢修中的幾個(gè)誤區(qū) </p> <p> 彈簧壓縮量越大密封效果越好其實(shí)不然，彈簧壓縮量過(guò)大，可導(dǎo)致摩擦副急劇磨損，淮安計(jì)量泵密封批量采購(gòu)，瞬間燒損;過(guò)度的壓縮使彈簧失去調(diào)節(jié)動(dòng)環(huán)端面的能力，導(dǎo)致密封失效。2、動(dòng)環(huán)密封圖越緊越好其實(shí)動(dòng)環(huán)密封圈過(guò)緊有害無(wú)益。一是加劇密封圈與軸套間的磨損，過(guò)于早漏;二是增大了動(dòng)環(huán)軸向調(diào)整、移動(dòng)的阻力，在工況變化頻繁時(shí)無(wú)法適時(shí)進(jìn)行調(diào)整;三是彈簧過(guò)度疲憊易損壞;四是使動(dòng)環(huán)密封圈變形，影響密封效果。 3、靜環(huán)密封圈越緊越好靜環(huán)密封圈基本處于靜止?fàn)顟B(tài)，相對(duì)較緊密封效果會(huì)好些，但過(guò)緊也是有害的。一是引起靜環(huán)密封因過(guò)度變形，影響密封效果;二是靜環(huán)材質(zhì)以石墨居多，一般較脆，過(guò)度受力極易引起碎裂;三是安裝、拆卸困難，極易損壞靜環(huán)，淮安計(jì)量泵密封批量采購(gòu)。密封面合理的間隙，淮安計(jì)量泵密封批量采購(gòu)，機(jī)械密封的平衡程度，密封端面液膜的閃蒸都是造成端面打開(kāi)而使固體顆粒進(jìn)入的主要原因。淮安計(jì)量泵密封批量采購(gòu)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淮安計(jì)量泵密封批量采購(gòu),封" src="https://tyunfile.71360.com/UploadFile/lscmjx/637247295161962890/6395142.jpg"></div><p> 防止工作介質(zhì)從泵內(nèi)泄漏出來(lái)或者防止外界雜質(zhì)或空氣侵入到泵內(nèi)部的裝置或措施稱為密封，被密封的介質(zhì)一般為液體、氣體或粉塵。 </p> <p> 造成泄漏的原因主要有兩個(gè)方面：一是密封面上有間隙。二是密封部位兩側(cè)存在壓力差，消除或減小任何一個(gè)因素都可以阻止或減小泄漏，達(dá)到密封的目的。泵的設(shè)計(jì)壓力和使用壓力是客觀存在不能減小，所以泵的密封該解決的是消除或減小密封面之間的間隙。這種間隙包括密封面之間的間隙和密封裝置本生內(nèi)部的間隙。 </p> <p> <br /> 南京清水密封廠家批發(fā)價(jià)格裝O形圈的溝槽尺寸超差，尤其是深度尺寸過(guò)大時(shí)，使O形圈安裝后壓縮變形量不足而影響密封能力。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淮安計(jì)量泵密封批量采購(gòu),封" src="https://tyunfile.71360.com/UploadFile/lscmjx/637247298179248047/5187331.jpg"></div><p> 結(jié)合設(shè)計(jì)經(jīng)驗(yàn)以及對(duì)API 682標(biāo)準(zhǔn)的研究，對(duì)泵用機(jī)械密封的選型要點(diǎn)進(jìn)行了分析，主要包括密封類型、密封形式、布置方式、沖洗方案等。進(jìn)而對(duì)煉油裝置中的高溫?zé)嵊捅?、高溫?zé)崴靡约皬?qiáng)酸強(qiáng)堿泵機(jī)械密封及輔助系統(tǒng)的選型提出了合理化建議，對(duì)API 682中的PLAN53B和PLAN23進(jìn)行了改進(jìn)，使之更好地為機(jī)械密封服務(wù)，有利于機(jī)械密封長(zhǎng)期穩(wěn)定運(yùn)行。 </p> <p> 由于機(jī)械密封具有密封性能好、工作可靠、泄漏量小、功率消耗少等特點(diǎn)，因而在國(guó)內(nèi)外煉油化工生產(chǎn)的旋轉(zhuǎn)設(shè)備中得到了較大規(guī)模的應(yīng)用，已經(jīng)成為泵、壓縮機(jī)、反應(yīng)釜、攪拌器等工藝設(shè)備能否正常運(yùn)轉(zhuǎn)的關(guān)鍵部件。 </p> <p> 隨著環(huán)境保護(hù)和人類健康要求的提高，煉油裝置中對(duì)泵用機(jī)械密封的要求也在不斷提高。據(jù)統(tǒng)計(jì)，煉油裝置中機(jī)泵故障的40% 以上是由于機(jī)械密封發(fā)生泄漏而引起的。造成這一現(xiàn)象的原因，一是作為機(jī)泵中的動(dòng)密封其本身所處的工作條件、起的作用所決定；二是許多國(guó)內(nèi)設(shè)計(jì)單位以及工程公司認(rèn)為機(jī)械密封及系統(tǒng)的選用是泵廠和密封廠的責(zé)任，往往對(duì)密封的類型、布置方式、沖洗方案了解不深，難以制定機(jī)械密封的選配方案，造成部分密封選型不當(dāng)。 </p> <p> <br /> </p><p> </p> <p> 一般情況下，介質(zhì)的溫度超過(guò)120℃即認(rèn)為是高溫密封。此時(shí)機(jī)械密封存在的主要問(wèn)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(jī)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(zhǎng)時(shí)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(jī)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(huì)加劇金屬材料的腐蝕，縮短機(jī)封的使用壽命。軸彎曲變形時(shí)橫截面形心沿與軸線垂直方向的線位移稱為撓度，機(jī)械密封要求兩個(gè)密封端面之間受力均勻。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淮安計(jì)量泵密封批量采購(gòu),封" src="https://tyunfile.71360.com/UploadFile/lscmjx/637247293921376953/5749071.jpg"></div><p> 水泵質(zhì)量跟機(jī)械密封的選擇安裝很關(guān)鍵。 </p> <p> 機(jī)械密封件屬于精密、結(jié)構(gòu)較為復(fù)雜的機(jī)械基礎(chǔ)元件之一，是各種泵類設(shè)備的關(guān)鍵部件。對(duì)于機(jī)泵，超過(guò)50%機(jī)率的泄露問(wèn)題產(chǎn)生原因往往就在機(jī)械密封上！ </p> <p> 機(jī)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(jī)械密封，耐高壓、耐腐蝕機(jī)械密封，耐顆粒介質(zhì)機(jī)械密封和適應(yīng)易汽化的輕質(zhì)烴介質(zhì)的機(jī)械密封等，應(yīng)根據(jù)不同的用處選取不同結(jié)構(gòu)型式和材料的機(jī)械密封。 </p> <p> 選型的主要參數(shù)有：密封腔體壓力（MPa）、流體溫度（℃）、工作速度（m/s）、流體的特性以及安裝密封的有效空間等。 </p> <p> <p> 根據(jù)密封腔體壓力，確定密封結(jié)構(gòu)采用平衡型或非平衡型，單端面或雙端面等。 </p> <p> 根據(jù)工作速度，確定采用旋轉(zhuǎn)式或靜止式，流體動(dòng)壓式或非接觸型。 </p> <p> 根據(jù)溫度及流體性質(zhì)，確定摩擦副和輔助密封材料，以及正確選擇潤(rùn)滑、沖洗、保溫、冷卻等機(jī)械密封循環(huán)保護(hù)系統(tǒng)等。 </p> <p> 根據(jù)安裝密封的有效空間，確定采用多彈簧或單彈簧或波形彈簧，內(nèi)裝式或外裝式。 </p> 介質(zhì)的低于飽和蒸汽壓力，使得端面液膜發(fā)生閃蒸，喪失潤(rùn)滑?；窗灿?jì)量泵密封批量采購(gòu)</p><p style="text-indent:25px">影響密封的主要因素有哪些？密封本身質(zhì)量、工藝操作條件、裝配安裝精度、主機(jī)本身精度、密封輔助系統(tǒng)?；窗灿?jì)量泵密封批量采購(gòu)</p><p> 油封的骨架和彈簧是金屬制作，密封唇口等主要部分為橡膠。油封根據(jù)使用環(huán)境，可以用不同的橡膠進(jìn)行生產(chǎn)，以滿足密封的性能和要求。**常用的耐油橡膠是丁腈橡膠，丁腈橡膠為目前油封及O型圈使用**普遍的橡膠之一。 </p> <p> <span style="font-size:12px;">可說(shuō)是目前用途**廣、成本比較低的橡膠密封件。制造油封常用的還有聚丙酸酯橡膠、硅橡膠、氟橡膠和聚四氟乙烯等。各種橡膠的性能請(qǐng)參見(jiàn)：主要橡膠的種類與特長(zhǎng)。 </span> </p> <p> <span style="font-size:12px;"> </span> </p> <p> 油封所使用的場(chǎng)合，其適用的密封介質(zhì)一般是礦物潤(rùn)滑油、潤(rùn)滑脂和合成潤(rùn)滑油、潤(rùn)滑脂。另外也可密封工業(yè)生產(chǎn)中使用的DIN51524液壓油類，VDMA24317以及VDMA24320高阻燃液壓油類，低潤(rùn)滑特性的硅油類。在特殊情況下也可密封潤(rùn)滑性低的酸類，堿類，有機(jī)溶劑類等腐蝕性介質(zhì)。 </p> <p> <span style="font-size:12px;">通常采用氟橡膠材料的油封其耐腐蝕性，耐高溫性都要比NBR材質(zhì)的好，在無(wú)潤(rùn)滑、純干燥和多介質(zhì)的條件下建議采用PTFE密封唇制作的油封，其密封唇有足夠的潤(rùn)滑能力，降低唇緣的磨損。單個(gè)油封不宜密封兩種不同的介質(zhì)，大量的化學(xué)物質(zhì)增加了對(duì)于油封材質(zhì)性能的影響，油封對(duì)密封介質(zhì)的相容性應(yīng)該通過(guò)實(shí)驗(yàn)室試驗(yàn)來(lái)確定。</span> </p> <br /> <p> <br /> 淮安計(jì)量泵密封批量采購(gòu)</p><p style="text-indent:25px">漣水創(chuàng)密機(jī)械制造有限公司致力于機(jī)械及行業(yè)設(shè)備，以科技創(chuàng)新實(shí)現(xiàn)***管理的追求。創(chuàng)密機(jī)械制造深耕行業(yè)多年，始終以客戶的需求為向?qū)?，為客戶提?**的[ "輕型密封", "中型密封", "重型密封", "小型水泵" ]。公司終堅(jiān)持自主研發(fā)創(chuàng)新發(fā)展理念，不斷優(yōu)化的技術(shù)、產(chǎn)品為客戶帶來(lái)效益，目前年?duì)I業(yè)額達(dá)到700-1000萬(wàn)元。創(chuàng)密機(jī)械制造始終關(guān)注機(jī)械及行業(yè)設(shè)備市場(chǎng)，以敏銳的市場(chǎng)洞察力以準(zhǔn)確定位，實(shí)現(xiàn)與客戶的成長(zhǎng)共贏。</p></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/259835.html</p></div></div></div></div></div><div id="c7li9dk" class="page-right twoColRt"><div id="edkbk9d" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="jgnujij" class="recomPic likePro"><a href="http://m.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(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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