水轮发电机用制动器无法复位机理分析和设计优化

Mechanism Analysis and Design Optimization of Hydro-generator Brake which is Unable to Reset

水轮发电机用气动复位式制动器无法复位的问题主要由腔体串气所致。数十年来,广大水力发电工作者围绕提升制动器复位可靠性这一工作主线,经过不懈的探索实践,研发出了一系列基于不同技术路线的制动器产品,都有各自的特点和优势。相对而言,近年来研发的单活塞三腔气动复位式制动器,其中间隔离腔结构设计对腔体串气问题解决得更为彻底。目前,单活塞三腔气动复位式制动器还处于试验推广阶段,其实际工作性能尚需更大范围的验证,尤其是“Y”型密封圈是否满足实际运行工况以及如何优选其规格型号还需进一步试验研究。

The problem that the pneumatic reset brake of hydro-generator cannot be reset is mainly caused by the blow-by in the cavity.In the past decades,the majority of hydropower workers have developed a series of brake products based on different technical routes through unremitting exploration and practice,focusing on the main line of improving the reliability of brake reset,all of which have their own characteristics and advantages.In recent years,the single piston three chamber pneumatic reset brake has been developed,in which the design of separated chamber structure solves the problem of blow-by in cavity more thoroughly.At present,the single piston three chambers pneumatic reset brake is still in the stage of test and popularization,and its actual working performance needs to be verified in a wider range,especially whether the"Y"seal ring meets the actual operating conditions and how to optimize its specifications and models need further experimental research.