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随着矿山采掘机械化的发展及整流设备的广泛采用,对直流电动机的应用正在逐渐增多。但矿井下的工作环境条件是十分恶劣的,特别是湿度大,极易引起电动机的损坏。一般矿井下的相对湿度都在百分之九十以上,特别是用水采及水砂充填的矿井和因岩石顶板的渗透造成滴水、淋水的现象,都大大增加了井下的湿度,相对湿度有时高达95～97％以上。一些矿山因受地质条件突然变
With the development of mine mining mechanization and the widespread adoption of rectifier equipment, the application of DC motor is gradually increasing. However, the working conditions of the mine is very poor, especially the humidity, can easily cause motor damage. Generally, the relative humidity in general mines is above 90%. Especially the mines filled with water and water sand and the dripping and watering phenomenon caused by the infiltration of rock roof greatly increase the downhole humidity. The relative humidity sometimes As high as 95 ~ 97%. Some mines suddenly changed due to geological conditions