摘要
针对工业汽轮机调节汽阀故障,导致汽轮机停机的问题,对工业汽轮机调节汽阀的结构特点进行了分析研究,对调节汽阀阀碟螺栓断裂和磨损,导致阀碟脱落问题的故障机理及工作环境进行了深入分析研究,提出了减少阀碟螺栓长度、对阀碟螺栓跳档使用及改进阀碟的装配工艺等措施,利用三维软件对其进行建模并利用ANSYS软件对改进前和改进后的阀碟螺栓进行了应力分析。研究结果表明,该方案可以减小阀碟螺栓承受的交变应力,提高阀碟螺栓根部的强度,可以改进因热胀不均而导致螺纹副出现相对位移的情况。结合宁夏石化机组的实际故障案例,通过将该方案应用于该机组中,彻底解决了该机组因阀碟螺栓断裂而导致机组故障问题。
Aiming at the problem of industrial steam turbine governor valve fault, leading to the turbine shutdown, the structural characteristics, the industrial steam turbine governor valve were analyzed and researched, the fault mechanism and the working environment were researched of the break and wear of the valve cone bolt, resulting the governor valve malfunction, the measures were presented to decrease the length of the valve cone bolt, increase the diameter of the bolt and improve the assembly technology of the valve, the model was established by the 3D software and the stress was analyzed by ANSYS software of improvement and improved vavle cone bolt. The results indicate that the plan decrease the alternating stress of the valve cone bolt, enhance the strength of the valve cone bolt, and improve the case of the relative displacement for the threads because of the uneven thermal expansion. Then combined with the practical fault case in NingXia petrochemical units and applied to the units, the experimental results show that the plan solves the valve cone bolt falfunction.
出处
《机电工程》
CAS
2014年第7期888-891,共4页
Journal of Mechanical & Electrical Engineering
关键词
汽轮机
调节汽阀
阀碟螺栓
故障分析
steam turbine
governor valve
valve cone bolt
fault analysis
作者简介
金长生（1959-），男，浙江杭州人，主要从事汽轮机的安装调试和故障诊断分析方面的研究．E—mail：jincs@htc．cn
