給你介紹泵在安裝中聯(lián)軸器找正，注意很重要?。。?/title>
<div align="center"><span style="font-size:14px">作者： 來源： 發(fā)布時(shí)間：2018-05-07</span></div>
<p><br/></p><p style="line-height: 3em;"> <span style="font-size: 16px;"> 聯(lián)軸器找正，是轉(zhuǎn)動(dòng)設(shè)備檢修工作的一項(xiàng)重要內(nèi)容，若找正的方法不對(duì)或找正找的結(jié)果不精確，會(huì)引起轉(zhuǎn)動(dòng)設(shè)備的振動(dòng)值超標(biāo)，嚴(yán)重威脅著轉(zhuǎn)動(dòng)設(shè)備的正常運(yùn)行，尤其是高轉(zhuǎn)速設(shè)備，對(duì)聯(lián)軸器找正的數(shù)據(jù)要求極為嚴(yán)格。今天小編就為大家分享幾個(gè)找正方法。</span></p><p style="line-height: 3em;"><span style="font-size: 16px;"> 聯(lián)軸器找正又叫找同心。泵、電機(jī)都安裝完之后，后一項(xiàng)工作就是泵與電機(jī)找同心，也就是使泵與原動(dòng)機(jī)的軸心在同一直線上，使之在運(yùn)轉(zhuǎn)中不致使振動(dòng)。新安裝的泵進(jìn)行找正時(shí)，聯(lián)軸器的徑向和軸向誤差可能出現(xiàn)以下情況：</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">一、一般的泵(水泵、小油泵)可以用平尺或塞尺進(jìn)行粗測(cè)，但是對(duì)大多數(shù)設(shè)備都需要精測(cè)，用百分表進(jìn)行測(cè)量。一般機(jī)泵的水平度已找好，以機(jī)泵的對(duì)輪為基準(zhǔn)，測(cè)定與調(diào)整電機(jī)對(duì)輪，來保證電機(jī)與機(jī)泵兩軸對(duì)中。</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">二、加減墊子計(jì)算方法</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">其中：</span>a表示軸向表讀數(shù)</p><p style="line-height: 3em;"><span style="font-size: 16px;">D表示靠背輪直徑</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">L1表示靠背輪到電機(jī)前腳距離</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">L2表示電機(jī)前腳到后腳的距離</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">S表示徑向表的讀數(shù)</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">這得出的結(jié)果就是你電機(jī)要加在前腳和后腳的墊子數(shù)量。</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">三、把百分表架到泵端，將百分表對(duì)零，將對(duì)輪旋轉(zhuǎn)一圈，每90度得到一個(gè)數(shù)值，百分表轉(zhuǎn)回其始位時(shí)必須回零，左右讀數(shù)相加應(yīng)該等于上下數(shù)值相加之和。然后根據(jù)讀數(shù)分析出兩軸的相對(duì)空間位置狀況，根據(jù)偏差值作出適當(dāng)調(diào)整。首先調(diào)整聯(lián)軸器的左右偏差到允許值，然后調(diào)整高低至標(biāo)準(zhǔn)之內(nèi)。</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">找正公式：</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">S1= ±(對(duì)輪軸向差值(張口絕對(duì)值)×支腳1到測(cè)點(diǎn)距離)÷測(cè)點(diǎn)直徑±圓周徑向插(差)值/2；</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">S2= ±(對(duì)輪軸向差值×支腳2到測(cè)點(diǎn)距離)÷測(cè)點(diǎn)直徑±圓周徑向插(差)值/2。</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">第一個(gè)±：如果對(duì)輪是上張口，取“+”號(hào)；如果是下張口，則取“-”號(hào)可理解為從上往下盤；</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">第二個(gè)±：電機(jī)低時(shí)取“+”；電機(jī)高時(shí)取“-” 可理解為從上往下盤 表是正寫正 是負(fù)寫負(fù)。</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">S1是正的話(上張口且電機(jī)偏低),說明應(yīng)該墊墊片,S1數(shù)即是要墊的墊片厚度。</span></p><p style="line-height: 3em;"><span style="font-size: 16px;">另：測(cè)點(diǎn)直徑為測(cè)表點(diǎn)旋轉(zhuǎn)直徑，而不是聯(lián)軸器直徑。調(diào)整左右與之類似。</span></p><p style="line-height: 3em;"><span style="font-size: 16px;"> 雙表找正，好是好，但軸向的位移有時(shí)不好掌握。新手靠運(yùn)氣也許半天搞不定，老師傅憑經(jīng)驗(yàn)十幾分鐘搞定！在180°的地方再加一塊軸向的表。所謂三表找正！</span></p><p><br/></p> </div>
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