摘要
超速飞锤是汽轮机超速保护系统的重要部件,飞锤的动作转速与飞锤的离心力及弹簧对飞锤的作用力有关。弹簧随汽轮机转子一同转动,在离心力作用下会发生不均匀变形。为求解弹簧对飞锤的作用力,从理论上推导出了弹簧在旋转时的线密度分布公式及内应力分布公式,根据内应力分布公式求解出了弹簧对飞锤的作用力,并以某机组A型号汽轮机的超速飞锤系统作为试验对象,验证了该理论分析结果的准确性。
Speeding flying hammer is a major component of overspeed protection system for steam turbines.The action speed of the flying hammer is related to its centrifugal force and the force acting on the flying hammer by the spring.The spring rotates with the rotor of steam turbine,leading to uneven deformation subject to centrifugal force.To solve the force acting on the flying hammer by the spring,the linear density distribution formula and internal stress distribution formula of the spring during rotation are theoretically derived.According to the internal stress distribution formula,the force acting on the flying hammer by the spring is solved,and the accuracy of the theoretical analysis result is verified based on the speeding flying hammer system of a type-A steam turbine in a unit as the test subject.
作者
邢兴龙
毕文策
刘闯铭
XING Xinglong;BI Wence;LIU Chuangming(China Nuclear Power Operations Co.,Ltd.,Shenzhen 518000)
出处
《电力安全技术》
2025年第7期31-34,共4页
Electric Safety Technology
关键词
汽轮机
超速飞锤
旋转弹簧
应力分布
steam turbine
speeding flying hammer
rotating spring
stress distribution
