水轮机活动导叶修复时的平面磨削系统研究

针对水轮机活动导叶的堆焊修复 ,研制了 PLC控制的平面磨削系统 ,代替了传统的手工磨削 ,使磨削精度及质量有了一个质的飞跃 ,实现了导叶平面磨削的自动化 .通过砂轮切削力与驱动电机电流的固有关系 ,在实时检测系统与控制系统的作用下 ,使砂轮驱动力工作在一定范围内 ,解决了砂轮磨损的自动补偿问题和在磨削过程中遇到突起高点时切削阻力激剧增大而造成的堵转或砂轮崩裂问题 .

Investigation of face grinding system for guide vane repairs of hydraulic turbines

Aimed at guide vane repairs of hydraulic turbines by means of bead welding, a face grinding system with PLC control is developed to substitute for the conventional manual grinding operation, making the grinding quality and accuracy improved radically and realizing the automatization of face grinding of the guide vanes. According to the intrinsic relationship between the grinding force of the grinder and the current of the driving motoer, real time monitoring system and controlling system make the driving force of the grinder be limited within a determined range, so that the problem of automatic compensation for the grinder wear and that of rotation choke off and breakup of the grinding wheel due to a sudden increase of grinding force when a protruding portion of the ground surface is encountered are solved effectively.