齐大山铁矿工务车间的WK—4型原设计没有通风电动机保护装置,对风扇电机出现的故障不能及时发现和处理,使电机本身的热量散不出去,导致电机本身温度急剧增高,造成电动机绝缘被击穿、易烧坏电动机。据统计,该车间因风扇电机出现故障不能及时处理而烧坏电动机达11台之多,占全年更换电机的三分之一。为此,工务车间技术员苏中段同工人一起设 Qi Dashan Iron Works workshop WK-4-type original design without ventilation motor protection device, the fan motor failure can not be found in time and processing, so that the motor itself can not be scattered heat, leading to a sharp increase in temperature of the motor itself, resulting in motor insulation Be punctured, easy to burn the motor. According to statistics, the workshop due to fan motor failure can not be handled in time and burn up to 11 motor as many as one-third of the annual replacement motor. To this end, the mid-section of the workshop workshop technician with the workers set up