基于TRIZ理论的乳化液泵曲轴偏心问题研究

Study of crankshaft eccentric problem of emulsion pump based on TRIZ theory

针对由乳化液泵曲轴偏心引起的曲轴强度不足、振动及寿命缩短问题,对乳化液泵曲轴偏心问题进行了研究,展开了基于TRIZ理论的冲突分析。首先利用装置复杂性与系统稳定性之间的冲突,得到导致偏心问题产生的实质,即轴颈局限于对轴心位置的调整,通过维数变化原理加以解决,利用空气轴承或磁悬浮轴承代替原支撑结构来解决曲轴的偏心问题;然后从方案中择优,利用监控的困难程度与生产率之间的冲突继续进行分析,通过物理或化学参数变化原理确定采用磁悬浮轴承;最后对磁悬浮轴承用于此曲轴进行适用性分析。研究结果表明该方案可以满足所需支撑和减小偏心的要求,并且可对乳化液泵曲轴新型支撑结构的设计提供理论参考。

Aiming at the problems that the insufficient strength of crankshaft, vibration and shorten the life span which were caused by the eccentric of emulsion pump crankshaft, a study was conducted on the eccentric crank. Conflict analyses of the eccentric problem of emulsion pump crankshaft were carried out on the theory of theory of innovation and problem sloving （TRIZ）. First the conflict which between com- plexity of device and stability of the system was used to obtain the essence of the problem which the shaft neck was confined to adjust the axial position. The issue could be solved by air bearings or magnetic bearings instead of the original supporting structures through the principle of changing dimension. Then the optimal one was selected relying on the conflict which was between the degree of difficulty of monitoring and the low productivity. The scheme choose magnetic bearings by the principle of parameter variation. At last, the applicability analysis of the optimal scheme was completed. The results indicate that the magnetic bearings can fulfill the requirements to supporting and reducing eccen- tric. The scheme can also provide theoretical reference for the designing of new supporting structures of the crankshaft of emulsion pump.