核电厂整体螺栓拉伸机机械手旋螺栓对中方案分析与试验

Analyze and Test of Reactor Vessel Main Stud Tensioner Robot Alignment Design

SKF整体螺栓拉伸机机械手在旋螺栓时采用主动对中的方式,根据该型整体螺栓拉伸机的现场使用反馈,大修旋螺栓时频繁出现超力矩报警导致螺栓无法旋入、旋出的情况,损伤螺孔螺纹的概率较主动对中方案的STS MSTM高,特别是在开盖阶段出现超力矩的情况更为明显。对比STS MSTM采用从动对中系统,旋拧主螺栓过程的力矩及螺孔状态较好。本报告分析了主动对中的设计缺陷,验证了当前整体螺栓拉伸机的主动对中性能,设计了试验方案验证SKF MSTM采用从动对中方式旋螺栓方式与比主动对中的效果对比。并对试验结果进行分析和总结。

The stud robot of SKF main stud tensioning machine(SKF MSTM)adopts the way of active alignment when turning bolts,while the STS main stud tensioning machine(STS MSTM)use the passive alignment way.According to the on-site feedback of the two types of MSTM,the SKF MSTM has the higher probability of over torque alarm.Especially in the opening stage,over torque situation is more obvious.This report analyzes the defects of active alignment design,verifies the active alignment performance of the current MSTM,and designs a test scheme to verify the effect comparison between SKF MSTM using the passive alignment method and the specific active alignment method.The experimental results are analyzed and summarized.