描述

6EC1710-OA

針對電磁方面造成的振動，應(yīng)從電源入手開始檢查。檢查三相電壓是否平衡，用鉗形電流表測量三相電流是否平衡，有沒有存在單相運行，生產(chǎn)中發(fā)現(xiàn)電動機(jī)接線盒內(nèi)端頭接線因緊固不牢，經(jīng)常燒斷，造成單相運行，應(yīng)加強(qiáng)此處檢查并進(jìn)行消除。若在用鉗形電流表測量時，發(fā)現(xiàn)三相電流不平衡，且表針擺動時高時低，說明轉(zhuǎn)子有籠條斷裂現(xiàn)象。此時應(yīng)立即停止電動機(jī)運行，切斷電源，抽出轉(zhuǎn)子進(jìn)行檢查，修復(fù)。另外，還應(yīng)測量三相定子繞組的電阻值，檢查繞組是否對稱，若電阻值不平衡，則說明有開焊部位，也應(yīng)抽出轉(zhuǎn)子后進(jìn)行檢查，重新焊接。電機(jī)的結(jié)構(gòu)同時包含電氣和機(jī)械兩部分，也可以說是電氣和機(jī)械的結(jié)合點。所以說，它的故障要一分為二的分析。對電機(jī)的振動故障原因也要分成兩部分。轉(zhuǎn)子在物理結(jié)構(gòu)上不是完全的的中心對稱、軸對稱。在轉(zhuǎn)動時轉(zhuǎn)動慣量的不平衡導(dǎo)致振動。振動情況根據(jù)轉(zhuǎn)速而變化。比如低速情況下振動很小，高速時振動大的情況；反過來也有低轉(zhuǎn)速下振動大，高轉(zhuǎn)速時振動變小的情況。另外，轉(zhuǎn)軸軸承同心度同軸度差也會引起振動，從設(shè)計上改用空氣軸承可以改善。
調(diào)整轉(zhuǎn)子的轉(zhuǎn)動慣量或軸承同心度度同軸度是很專業(yè)的工作，除了是原產(chǎn)廠家很難操作?，F(xiàn)實中一般的解決辦法就是在固定電動機(jī)的時候配置減振彈簧、減振橡膠等。

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6EC1710-OA

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