1、卷筒开裂可能因为结构不合理，钢板较薄，强度富裕度偏低，筒壳材质较差，均采用钢板。
Ningbo lifting platform roll cracking probably because of the irrational structure, steel thin, low intensity affluence, poor drum shell material, are used in steel.

2、升降平台技术参数较低，而目前使用负荷都较满，甚至有些单位长期超负荷使用。升降平台的卷筒在循环应力作用下产生疲劳裂纹，扩展的结果就造成卷简钢板或焊缝的开裂。
Ningbo lifting platforms low technical parameters and load current use are relatively full, and even some units of long-term overload. Reel lifting platforms fatigue cracks under cyclic stress,the result of expansion and causing cracking or weld steel roll Jane.

3、升降平台在使用时应立即在裂纹端部打上止裂孔，将裂纹截住， 使其不再向前扩展，然后进行补焊和加固。最彻底的办法是对升降平台卷筒进行技术改造，可将筒壳更换成新结构的筒壳，或将整个主轴装置更换成新结构的主轴装置。
Ningbo lifting platform in use should immediately stop the crack tip marked hiatus, will crack stopped, it is no longer extended forward, then patching and reinforcement. The most thorough way is to roll lifting platform for technological innovation, you can replace the cartridge shell into a tube shell of the new structure, or to replace the entire spindle apparatus into the new structure of the spindle apparatus.