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class="container clearfix tcPro"><section class="home-main container clearfix"><div id="u7p8vs3" class="twoCol"><div id="srjbdx8" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_dgdq/">電工電氣</a>?<a href="http://www.cdcfah.com/cp/second-dgdq_gydqew/">高壓電器</a>?<a href="http://www.cdcfah.com/cp/third-gydqew_gykggek/">高壓開關(guān)柜</a>?內(nèi)江渦街流量計(jì)廠家客戶至上成都皖川科技供應(yīng)</p><div id="bas8t8a" class="leftbox clearfix"><h1>內(nèi)江渦街流量計(jì)廠家客戶至上成都皖川科技供應(yīng)</h1><div id="smtq33n" class="proBig"><div id="fpmjiz2" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/cdwckj/637107349132265625/2309518.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="dhoahoa" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/cdwckj/637107349132265625/2309518.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="oyaheqi" 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>四川省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>內(nèi)江渦街流量計(jì)廠家</p><p><span>***更新：</span>2020-06-18 09:22:08</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="yspro2r" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">成都皖川科技有限公司</a></p><p><span>聯(lián)系人：</span>朱成生</p><p><span>郵箱: </span>cdwckjgs@sina.com</p><p><span>電話: </span>18755046999</p><p><span>傳真: </span>028_87463776</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>028-87463776</p><p><span>地址: </span>四川省成都市青羊區(qū)青羊萬達(dá)廣場SOHO公寓2-2-1138室</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="odaxzv8" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="ix2hyq8" class="box"><p><p> 原理 </p> <p> 渦街流量計(jì)是根據(jù)卡門渦街原理(Kármán Vortex Street)測量氣體，內(nèi)江渦街流量計(jì)廠家、蒸汽或液體的體積流量、標(biāo)況的體積流量或質(zhì)量流量的體積流量計(jì)。并可作為流量變送器應(yīng)用于自動(dòng)化控制系統(tǒng)中。 </p> <p> 渦街流量計(jì)是應(yīng)用流體振蕩原理來測量流量的，流體在管道中經(jīng)過渦街流量變送器時(shí)，在三角柱的旋渦發(fā)生體后上下交替產(chǎn)生正比于流速的兩列旋渦，旋渦的釋放頻率與流過旋渦發(fā)生體的流體平均速度及旋渦發(fā)生體特征寬度有關(guān)，可用下式表示：式中：為旋渦的釋放頻率，單位為Hz；v為流過旋渦發(fā)生體的流體平均速度，單位為m/s；d為旋渦發(fā)生體特征寬度，單位為m；St為斯特勞哈爾數(shù)（Strouhal number），無量綱，它的數(shù)值范圍為0.14－0.27。 </p> <p> St是雷諾數(shù)的函數(shù)，當(dāng)雷諾數(shù)Re在范圍內(nèi)，內(nèi)江渦街流量計(jì)廠家，St值約為0.2，內(nèi)江渦街流量計(jì)廠家。在測量中，要盡量滿足流體的雷諾數(shù)在，此時(shí)旋渦頻率由此，通過測量旋渦頻率就可以計(jì)算出流過旋渦發(fā)生體的流體平均速度v，再由式可以求出流量q，其中A為流體流過旋渦發(fā)生體的截面積 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="內(nèi)江渦街流量計(jì)廠家" src="http://tyunfile.71360.com/UploadFile/cdwckj/637107349132265625/2309518.jpg"></div><p> 常見故障 </p> <p> 渦街流量計(jì)常見故障：一臺(tái)DN50渦街流量計(jì)，從說明書查到，其液體用流量范圍是3-50m3/h。我們在油流標(biāo)準(zhǔn)裝置上標(biāo)定的結(jié)果是10-50 m3/h符合精度要求，但10m3/h以下精度不合格，應(yīng)如何評價(jià)此臺(tái)流量計(jì)？ </p> <p> 渦街流量汁說明書中，標(biāo)明的流量范圍是使用于特定參考介質(zhì)的流量范圍，如液體—般指常溫水。用于其他介質(zhì)時(shí)，可用流量范圍將隨介質(zhì)的粘度和密度不同而異。由于油流量標(biāo)準(zhǔn)裝置采用粘度比水大，密度比水小的柴油做標(biāo)定介質(zhì)，流量計(jì)的下限流量—般都會(huì)相應(yīng)提高，使可用流量范圍變窄。所以，渦街流量計(jì)在油流量標(biāo)定裝置上標(biāo)定出現(xiàn)小流量性能變差是正常的。由此我們不難推斷，如果用液化石油氣(這種低粘度介質(zhì))標(biāo)定渦街流量汁，將會(huì)得到比水好的相反結(jié)果。 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="內(nèi)江渦街流量計(jì)廠家" src="http://tyunfile.71360.com/UploadFile/cdwckj/637107349081816406/9531621.jpg"></div><p> 特點(diǎn) </p> <p> 1、結(jié)構(gòu)簡單而牢固，無可動(dòng)部件，可靠性高，長期運(yùn)行十分可靠。 </p> <p> 2、安裝簡單，維護(hù)十分方便。 </p> <p> 3、檢測傳感器不直接接觸被測介質(zhì)，性能穩(wěn)定，壽命長。 </p> <p> 4、輸出是與流量成正比的脈沖信號，無零點(diǎn)漂移，精度高。 </p> <p> 5、測量范圍寬，量程比可達(dá)1：10。壓力損失較小，運(yùn)行費(fèi)用低，更具節(jié)能意義。 </p> <p> 6、在一定的雷諾數(shù)范圍內(nèi),輸出信號頻率不受流體物理性質(zhì)和組份變化的影響，儀表系數(shù)*與旋渦發(fā)生體的形狀和尺寸有關(guān)，測量流體體積流量時(shí)無需補(bǔ)償，調(diào)換配件后一般無需重新標(biāo)定儀表系數(shù)。應(yīng)用范圍廣，蒸汽、氣體、液體的流量均可測量。 </p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/299901.html</p></div></div></div></div></div><div id="c7rg8rx" class="page-right twoColRt"><div id="b8rjlsp" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="bq2amta" 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="azli3e2" class="recomPic likePro"><a 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