大电机送风道是用钢筋混凝土制成的,它在使用中易产生裂缝。当地下水位较高时,易出现渗水现象,而这又是电机工作所不允许的。如用纯水泥加速凝剂进行补漏,结硬后仍容易开裂。为此,在渗水较严重的二辊轧机下辊电动机的送风道内增设了塑料衬套,结果较理想。 The large motor air duct is made of reinforced concrete and it is easy to crack in use. When the groundwater level is high, water seepage is likely to occur, which is not allowed by the motor work. Such as using pure cement accelerating coagulants to make up for leakage, it is still easy to crack after the knot is hard. For this reason, plastic bushings have been added to the air supply ducts of the lower roll motor of the two-high rolling mill with severe water seepage, and the result is ideal.