產(chǎn)生振動的振源為流體穩(wěn)定流動產(chǎn)生的振動,流體速度的波動,通過管道或其它連接件傳播的動力機械振動等,橫向流是流體誘導管束振動的主要根源。漩渦脫落誘導振動當流體橫掠換熱管時,如果流動雷諾數(shù)大到一定程度,在其兩側的下游交替發(fā)生漩渦,形成周期性的漩渦尾流,致使圓管上的壓力分布也呈周期性變化。圓管兩側的靜壓不同,產(chǎn)生一個垂直于流動方向的升力,其大小與方向隨漩渦的脫落而不斷變化。正是由于這種升力的交替變化,導致了圓管與流體流動方向垂直的振動。
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0191418074 SPACING SLEEVE
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可以將壓機連接熱壓板的軟管部位加罩密封起來。層壓機進出料口加可開關的門。如果是在同一方向進出料，則只做一個門，后面部位封閉。如果是在壓機的一個方向進料，另一個方向出料，則二個面均做門。門可以做成側開式，也可以做成上下開形式，門采用電機傳動鏈條結構形式較為簡單。當門被傳動到位時，由裝在靠近門的四個角上的氣缸將門壓緊到壓機機架上。在門上裝有密封用的硅橡膠膠圈，以使門與壓機機架密合，使對壓機抽真空時不會漏氣。輸出打印功能。各種查詢信息、圖形曲線、報表等都能在屏幕上顯示和打印機上打印出來。海水廠監(jiān)控系統(tǒng)濱海水廠監(jiān)控系統(tǒng)整個油田供水自動化系統(tǒng)所不可缺少的一部分。因為它既是一個獨立的子系統(tǒng)，承擔了濱海水廠內(nèi)部的監(jiān)測工作，直接作用于水量分配、水質監(jiān)測、供水量和水壓調(diào)整等重要工藝環(huán)節(jié)，對運行管理、確保安全、保證水質、降低消耗等方面都具有很大的作用；同時它還負責采集外部相關供水站(含有灤河水、水庫水)的數(shù)據(jù)，經(jīng)處理后與廠內(nèi)有關數(shù)據(jù)一起送水廠模擬屏實時顯示。
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