配电柜排夹结构减重优化设计

Weight Optimum Design for the Copper Bar Clamp Structure of the Power Distribution Cabinet

针对配电柜内铜排短路电流产生很大的电动力,铜排容易失效,需要使用大量排夹,从而导致设备超重这一现象,对配电柜排夹进行优化减重设计,在满足结构强度的同时,合理设计排夹尺寸,使得重量最小。本文采用电-结构耦合有限元法得到承受短路电流时,铜排和排夹的应力响应。通过对比分析排夹不同尺寸的脊高、齿高和厚度对应力的影响得出规律,为排夹结构减重设计提供参考。

A lot of copper bar clamps are added to cope with the possible failure of the bars caused by large electrodynamic force which induced from the short current of the copper bars in the power distribution cabinet,which in turn would cause the cabinet overweight.The weight optimum design of the clamps is introduced.For the design the size of the clamp is minimized,with proper structural strength reached.In this paper,the electrical structure coupling finite element method is used to obtain the stress response of the copper bars and their clamps when subjected to short circuit current.By comparing and analyzing the influence of different sizes of ridge height,tooth height and thickness on the stress of the row clamp,the relation curve are plotted,which provide reference for the weight reduction design of the copper bar clamp structure.