At the same time, the frequent n&r transfer generate huge force to the electric motor itself and tends to break the motor's cast-ironframe.
同时电机频繁正反转对电机本身也产生巨大冲击,容易造成铸铁电机罩壳破碎。
2
The submersible motor enclosure including frame, end brackets, flanges and cap assembly shall be constructed of close-grained castiron, ASTM A-48, Class 30 or better.
潜水电机壳体,包括机架,尾轴承架,法兰和罩盖总装,必须采用符合美国材料试验协会ASTM A - 48类别30标准的、密实的铸铁或更好的材料制造。
3
It has good airproof, and the frame material is used with high strength castiron, SKF bearing. These ensure the motor can reliably run under the tough condition.