Analysis of the destruction of the francis turbine draft tube inner side of dongjiang power plant 东江电厂水轮机尾水管里衬破坏原因初探
Extracting dynamic characteristic information on draft tube of hydraulic turbine by using wavelet packet 用小波包分析提取水轮机尾水管动态特性信息
Secondly , the power density spectrum is calculated from fft and the units " behavior is analyzed in the frequency domain ; the waterfall form for the start up process is plotted 运用fft求取功率谱,分析信号的频域特性,绘制启动过程瀑布图;分析尾水管压力脉动对机组轴系的激励作用
The units " vibration , noise and pressure fluctuation in the draft tube are measured in wanjiazhai hydro power station . eighteen measuring points were arranged on the 2 # and 5 # units respectively 尾水管压力脉动以及噪声等重要参数进行测量分析,试验包括2 #机组和5 #机组各18个有效测点
The liner of turbine draft tube in ankang water power station was punched by cavitation , which leads to welding crack , metal shed and concrete delve , water spurting out . the cause of the damage is analyzed , the treatment is expounded 论述了安康水电站水轮机尾水管里衬被汽蚀破坏穿透、焊缝开裂、撕裂掉块、混凝土掏空、大量喷水的事故原因及处理方法。
Abstract : the liner of turbine draft tube in ankang water power station was punched by cavitation , which leads to welding crack , metal shed and concrete delve , water spurting out . the cause of the damage is analyzed , the treatment is expounded 文摘:论述了安康水电站水轮机尾水管里衬被汽蚀破坏穿透、焊缝开裂、撕裂掉块、混凝土掏空、大量喷水的事故原因及处理方法。
Thirdly , the correlative coefficient is computed between the pressure fluctuation signal of draft tube and the displacement signal of upper guide bearing , the thrust bearing and the head cover , with this the conclusions on the shafts response due to pressure surge in 并与模型尾水管压力脉动试验结果进行对比?结合流动仿真试验以及动力特性计算结果,全面分析?评定机组的实际运行状况,划定运行区域,为电站合理调度
The technological innovation and optimum design were implemented by the design organization during the working drawing period , as a result , the new technology of separated floor for draft tube bend is applied , and the optimized arrangement plan of structure is more compact , the structure form is more rational , rate of progress is accelerated , about 1 . 37 hundred million yuan is saved , which is of significant general benefits 施工详图阶段，设计单位根据创建节约型社会的宗旨，积极开展一系列技术创新和优化设计工作，并首创了厂房尾水管肘管段分离式底板新技术，优化设计后枢纽布置更加紧凑，建筑物结构形式更为合理，加快了施工进度，节约工程投资约1 . 37亿元，综合效益显著。
In this paper according to the design scheme of yao heba power station in nan yahe river , the mathematical model with longer and complicated conduit system , elastic water hammer and pid regulating low of voter turbine adjusting system in the case of the small fluctuation has being built , which include conduit system , surge tank , draft tube , water turbine , generator and governor . the hydraulic losses are taken into account , and nonlinearization in water turbine and the governor is also taken into account 本文根据南桠河姚河坝水电站的设计方案，对水轮机调节系统，按长引水管道复杂引水系统、弹性水击、调速器为pid调节规律，在小波动情况下，对包括引水道、调压井、尾水管、水轮机、发电机、调速器在内的水轮机调节系统建立数学模型，并计及引水管道水力摩阻损失，对水轮机、调速器考虑了其中的非线性，利用功能强大的matlab软件编制了源程序进行计算机仿真计算。
