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农用电动机运行时,可通过听、看、摸、闻四种方法来及时预防和排除故障,保证电动机的安全运行。1.听电动机若发出噪声太大,包括电磁噪声、轴承杂音、通风噪声、机械摩擦声等,均可能是故障先兆或故障现象。(1)对于电磁噪声。如果电动机发出忽高忽低且沉重的声音,则原因可能有以下几种。1定子与转子间气隙不均匀,此时声音忽高忽低且高低音间隔时间不变,这是轴承磨损从而使定子与转子不同心所致。2三相电流不平衡。这是三相绕组存在误接、短路或接触不良等原因,若声音很沉闷则说明电动机严重过载或缺相运行。3铁芯松动。电动机在运行中因
Agricultural motor operation, by listening, watching, touching, smell four ways to timely prevention and troubleshooting, to ensure the safe operation of the motor. 1. Listen to the motor if the noise is too large, including electromagnetic noise, bearing noise, ventilation noise, mechanical noise, etc., may be a sign of failure or failure phenomenon. (1) For electromagnetic noise. If the motor sends bumpy and heavy sounds, the reasons may be the following. 1 stator and rotor air gap is not uniform, then the sound suddenly high and low and bass interval unchanged, this is the bearing wear so that the stator and rotor are not due to heart. 2 three-phase current imbalance. This is the existence of three-phase winding misconnection, short circuit or poor contact and other reasons, if the sound is boring, then the motor overload or lack of phase operation. 3 iron core loose. Motor in operation due to