问题
问答题 简答题
电动机的转子与定子间隙冒火花是什么原因?
答案
参考答案:
一般是由于电动机轴与轴承旷动过大或轴承室过松,造成转子“扫膛”转子会因摩擦而发热,局部产生高温,槽表面的绝缘材料在高温下变得焦脆,甚至发生冒烟和火石。
电动机的转子与定子间隙冒火花是什么原因?
参考答案:
一般是由于电动机轴与轴承旷动过大或轴承室过松,造成转子“扫膛”转子会因摩擦而发热,局部产生高温,槽表面的绝缘材料在高温下变得焦脆,甚至发生冒烟和火石。
Before Christmas Mr. Smith broke his right leg and had to stay in hospital. When he was there, he always asked his doctor when he could go home. He didn't like to spend Christmas in hospital. Though the doctor did his best, Mr. Smith didn't get better. So on Christmas Day he was still in hospital. He spent a bad day in bed thinking that he missed a lot of fun on such a happy day. The next day the doctor told him that he might be well enough to leave hospital in time for the New Year. Mr. Smith was very happy to think that he would spend New Year's Day outside hospital. Soon Mr. Smith left hospital and on New Year's Eve he went to a party. He enjoyed himself there. But he drank too much. On his way home that night, he had a fall and broke his left leg. What an unlucky man he was! 小题1:Mr. Smith spent Christmas Day in hospital because ______.
B.at a party C.in hospital D.outside hospital |