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src="https://tyunfile.71360.com/WaterMark/UploadFile/jjsrxby/637261969163437500/4474754.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="mldv84b" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/jjsrxby/637261969163437500/4474754.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="jyasurt" 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>常州工業(yè)離心泵配件</p><p><span>***更新：</span>2020-06-01 04:21:27</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="a7au8po" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">靖江市瑞鑫泵業(yè)有限公司</a></p><p><span>聯(lián)系人：</span>王宇琳</p><p><span>郵箱: </span>www17768716667@163.com</p><p><span>電話: </span>17768716667</p><p><span>傳真: </span>0523_</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0523-84326878</p><p><span>地址: </span>新橋鎮(zhèn)水三村巴五圩14號</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="shz2qs3" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="j88ftlg" class="box"><p><p> 然后從葉片的端部被甩出進(jìn)入泵殼內(nèi)的蝸室或擴(kuò)散管（或?qū)л啠?。?dāng)液體流到擴(kuò)散管時(shí)，由于液流的斷面積漸漸擴(kuò)大，流速減慢，將一部分動能轉(zhuǎn)化為靜能頭，使壓力上升，從排出管壓出。與此同時(shí)，在葉輪中心由于液體被甩出產(chǎn)生了局部真空，因而吸液池內(nèi)的液體在液面壓力作用下就從吸入管源源不斷地被吸入泵內(nèi)。葉輪連續(xù)旋轉(zhuǎn)，將液體不斷地由吸液池送往高位槽或壓力容器。離心泵工作原理示意圖離心泵工作原理演示離心泵能輸送液體是依靠高速旋轉(zhuǎn)的葉輪使液體受到離心力的作用，故名為離心泵，常州工業(yè)離心泵配件。圖1-15所示為離心泵裝置，離心泵進(jìn)出管線上的管路附件，對泵的正常操作作用很大，底閥是一個(gè)止回閥，它的作用是保證啟動前往泵內(nèi)灌的液體不會由吸入管流走。濾網(wǎng)則可防止吸液池內(nèi)的雜物進(jìn)入管道或泵殼造成堵塞。離心泵啟動時(shí)，若泵體和吸入管內(nèi)沒有液體，它是沒有抽吸液體的能力的，常州工業(yè)離心泵配件，因?yàn)樗奈丝诤团懦隹谑窍嗤ǖ?，葉輪中無液體而只有空氣時(shí)，由于空氣的密度比液體的密度小得多，不論葉輪怎樣高速旋轉(zhuǎn)，常州工業(yè)離心泵配件，葉輪進(jìn)口都不能達(dá)到吸液所需要的真空度，即產(chǎn)生的離心力就很小，因而在葉輪中心區(qū)所形成的低壓不足以將吸液池（貯槽）內(nèi)的液體吸人泵內(nèi)，而不能吸液。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州工業(yè)離心泵配件" src="https://tyunfile.71360.com/WaterMark/UploadFile/jjsrxby/637261969163437500/4474754.png"></div><p> 改變泵的轉(zhuǎn)速 </p> <p> 改變泵的轉(zhuǎn)速實(shí)質(zhì)上是改變泵的特性曲線。泵原來轉(zhuǎn)速為n，工作點(diǎn)為M，如下圖所示，若把泵的轉(zhuǎn)速提高到n1，泵的特性曲線 H——Q往上移，工作點(diǎn)由M移至M1，流量由QM加大到QM1。若把泵的轉(zhuǎn)速降至n2，工作點(diǎn)移至M2，流量降至QM2。 </p> <p> 這種調(diào)節(jié)方法需要變速裝置或價(jià)格昂貴的變速原動機(jī)，且難以做到連續(xù)調(diào)節(jié)流量，故化工生產(chǎn)中很少采用。 </p> <p> 用閥門調(diào)節(jié)流量迅速方便，且流量可以連續(xù)變化，適合化工連續(xù)生產(chǎn)的特點(diǎn)。所以應(yīng)用十分廣。缺點(diǎn)是閥門關(guān)小時(shí)，阻力損失加大，能量消耗增多，很不經(jīng)濟(jì)。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州工業(yè)離心泵配件" src="https://tyunfile.71360.com/UploadFile/jjsrxby/637261023229531250/3173104.png"></div><p> 但在處理泵的振動問題時(shí)卻通常是首先考慮的因素。引起振動的這一類原因的主要原因包括：a.臨界轉(zhuǎn)速問題——這類問題實(shí)際上在以全速運(yùn)行的臥式泵內(nèi)是不存在的：生產(chǎn)商已對泵進(jìn)行了設(shè)計(jì)，因此其臨界轉(zhuǎn)速將高出高轉(zhuǎn)速。("臨界轉(zhuǎn)速"指激起旋轉(zhuǎn)設(shè)備自然頻率的理論角速度。旋轉(zhuǎn)速度達(dá)到自然頻率時(shí)便發(fā)生振動和共振。)在立式泵(如具有各類長度和轉(zhuǎn)頭的立式渦輪機(jī))內(nèi)，臨界轉(zhuǎn)速應(yīng)在制造之前予以考慮。在臥式泵內(nèi)，臨界轉(zhuǎn)速通常由超速、缺少管道支撐件或未考慮的多泵組引起。(缺少管道支撐件時(shí)，管道實(shí)際上成為了"泵的一部分"，且系統(tǒng)的臨界轉(zhuǎn)速與泵的臨界轉(zhuǎn)速不同。)這與下文將討論的外部原因引起的問題相類似?？刹捎脙煞N方法糾正臨界轉(zhuǎn)速問題，將振動減少至可接受水平：1.改變泵的自然頻率，這一操作應(yīng)咨詢泵生產(chǎn)商或在其協(xié)助下進(jìn)行。屬于常用方法。2.改變轉(zhuǎn)速(針對VFD系統(tǒng)時(shí)尤為有用)。通過臨界轉(zhuǎn)速"鎖定"或加速以預(yù)防機(jī)械運(yùn)轉(zhuǎn)。b.嚴(yán)重氣濁——?dú)鉂徇_(dá)到一定嚴(yán)重程度時(shí)(由NPSH或攜入的空氣引起)，內(nèi)爆的能量將引起整個(gè)裝置急劇振動。當(dāng)然，隨著氣濁的繼續(xù)，泵輪材料將被腐蝕，振動也進(jìn)一步加劇。合理選用泵則可避免此類情況出現(xiàn)，但隨著系統(tǒng)老化以及管道改變這類情況仍可發(fā)生。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州工業(yè)離心泵配件" src="https://tyunfile.71360.com/WaterMark/UploadFile/jjsrxby/637261969444003906/839526.png"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/103505.html</p></div></div></div></div></div><div id="cwoqspr" class="page-right twoColRt"><div id="tnpm39u" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="xrd3ro8" 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(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="vu8km83" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img src="https://tyunfile.71360.com/WaterMark/UploadFile/nbzxsw/637298235378037109/764794.png" alt="寧波寧海直接考A2有幾個(gè)科目真誠推薦寧波助學(xué)商務(wù)信息咨詢供應(yīng)" class="vcenter" 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