140CRA21220C Quantum

摸電動(dòng)機(jī)一些部位的溫度也可判斷故障原因。為確保，用手摸時(shí)應(yīng)用手背去碰觸電動(dòng)機(jī)外殼、軸承周圍部分，若發(fā)現(xiàn)溫度異常，其原因可能有以下幾種。

1.通風(fēng)不良。如風(fēng)扇脫落、通風(fēng)道堵塞等。

2.過(guò)載。致使電流過(guò)大而使定子繞組過(guò)熱。

3.定子繞組匝間短路或三相電流不平衡。

4.頻繁啟動(dòng)或制動(dòng)。

5.若軸承周圍溫度過(guò)高，則可能是軸承損壞或缺油所致。

電機(jī)軸承溫度規(guī)定、出現(xiàn)異常的原因及處理

規(guī)程規(guī)定，滾動(dòng)軸承高溫度不超過(guò)95℃，滑動(dòng)軸承高溫度不超過(guò)80℃。并且溫升不超過(guò)55℃（溫升為軸承溫度減去測(cè)試時(shí)的環(huán)境溫度）；

具體見(jiàn)HG25103-91 軸承溫升過(guò)高的原因及處理：

（1）原因：軸彎曲，中心線不準(zhǔn)。

處理；重新找中心。

（2）原因：基礎(chǔ)螺絲松動(dòng)。

處理：擰緊基礎(chǔ)螺絲。

（3）原因：潤(rùn)滑油不干凈。

處理：更換潤(rùn)滑油。

（4）原因：潤(rùn)滑油使用時(shí)間過(guò)長(zhǎng)，未更換。

處理：洗凈軸承，更換潤(rùn)滑油。

（5）原因：軸承中滾珠或滾柱損壞。

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