某600MW机组低压-发电机联轴节螺栓结构优化分析

Analysis of the Structural Optimization of Bolts Destined for the Coupling of a 600 MW Unit Low-voltage Generator

针对某600 MW机组低压-发电机转子联轴节两侧轴振突跳、连接螺栓弯曲和轮盘错位问题,在研究螺栓伸长量和传递扭矩关系的基础上,提出四凸台螺栓优化结构以代替原有三凸台螺栓结构,采用三维非线性接触有限元进行不同工况下两种螺栓结构的计算分析,对比计算结果,说明四凸台优化方案能够在各种工况有效安全传递扭矩,保证机组安全运行。

In the light of such problems as abrupt jump of the vibration value and mismatching of the wheel disks caused by any deficiency in design of bolts for the coupling on the rotor of a 600 MW unit low-voltage generator,proposed was an optimized four-boss bolt structure instead of the original three-boss bolt one on the basis of a study of the relationship between the elongation of the bolts and the torque transferred.The three-dimensional non-linear contact finite element method was used to calculate and analyze both bolt structures under different operating conditions.A comparison of the calculated results indicates that the four-boss optimization version can effectively and safely transfer a torque under various operating conditions and ensure safe operation of the unit.