胶囊式储油柜胶囊破损成因分析与预防方法

Cause Analysis and Prevention Measures for the Capsule Damage in Capsule-type Oil Storage Tanks

变压器储油柜的结构有多种,其中部分变压器采用的是胶囊式储油柜,经过多年使用后暴露出其胶囊易破损,影响设备的正常运行。分析这类变压器各种不同状态下胶囊的工作情况,再结合某水利发电厂主变压器的储油柜胶囊检查,探究储油柜胶囊破损的根本原因,主要是胶囊与连杆轴的接触中有较大的压力或拉力。为此应减少胶囊与连杆轴的接触,并避免二者间产生较大的压力或拉扯力。

The oil storage tank in transformers is of various structures.Some transformers adopt the capsule-type oil storage tank.While,the capsules are prone to damage after years of working,which affects the normal operation of the equipment.By analyzing the working conditions of the capsules in different states of such transformers,and combining the inspection results of the oil storage tank capsule in the main transformer in a hydropower plant,the basic reasons of the capsule damage are explored.It shows that the damage is mainly caused by the excessive pressure or tension in the contacts between the capsule and the connecting rod shaft.Thus,it is necessary to reduce such contacts and to avoid the generation of excessive pressure or tension between these two parts.