排灌机械工程学报
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排灌机械工程学报  2013, Vol. 31 Issue (4): 309-312    DOI: 10.3969/j.issn.1674-8530.2013.04.007
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栗子坪电站水轮机补气装置改造
 周涛, 张海库, 朱晓敏, 刘小兵, 刘德民, 邓明贵
(1. 国电四川栗子坪发电有限公司, 四川 雅安 625400; 2. 四川省电力工业调整试验所, 四川 成都 610072;
3. 西华大学能源与环境学院, 四川 成都 610039; 4. 中国东方电气集团有限公司, 四川 成都 611731)
Aeration valve improvement of Liziping hydropower plant Francis turbine
 ZHOU  Tao, ZHANG  Hai-Ku, ZHU  Xiao-Min, LIU  Xiao-Bing, LIU  De-Min, DENG  Ming-Gui
(1.Guodian Sichuan Liziping Electric Power Co.,Ltd.,Yaan, Sichuan 625400, China; 2.Commissioning and Test Institute of Sichuan Electric Power Industry, Chengdu, Sichuan 610072, China; 3.School of Energy and Environment, Xihua University, Chengdu, Sichuan 610039, China; 4.Dongfang Electric Corporation, Chengdu, Sichuan 611731, China)
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摘要 针对栗子坪电站高水头混流式水轮机原设计中,采用水轮机主轴法兰根部孔对转轮中心下方进行补气的方式在涡带区不能正常补气,并会引起机组振动过大的问题,通过采用加装尾水管十字架补气装置对机组补气装置进行了设计改造;为防止十字架装置脱落,采用优质不锈钢材料,对其进行流线型加工,且补气孔设在十字架中心和背水边,以减小水流阻力和涡带反作用力.对比改造前后的机组振动、压力脉动及补气量的试验数据,结果表明:改造后,补气装置可以正确地在机组强振动区自动补气,能有效地消除尾水涡带引起的压力脉动;机组导轴层摆度、机架和顶盖振动都有不同程度的减小,并从根本上解决了尾水管锥管摆动问题,对机组的整体稳定运行起到了很好的作用.
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周涛
张海库
朱晓敏
刘小兵
刘德民
邓明贵
关键词水轮机   补气装置   改造   振动   压力脉动     
Abstract: For Francis turbine, reasonable aeration can weaken vibration and cavitation effectively. The high head turbine of Liziping hydropower plant originally uses holes at turbine bearing flange root to aerate, and which can not have expected function for the whirl area and causes significant vibration. A project of setting cross aeration valve in draft tube is proposed. To prevent the device from falling off and reduce flow resistance and lower whirl whip reaction, the streamline shaped cross aeration was made of highquality stainless steel and had compensating holes placed in the center and back of it. According to the comparison of the vibrations, pressure fluctuations and air admission test before and after the modification, the results show that it can exactly and automatically supply air to the strong vibration region, effectively eliminate pressure fluctuation caused by draft tube whirl whip, the vibration of bearing, brackets and cover are reduced to different degrees respectively, and the draft tube cone swing completely solved. It works well for the stability of hydroelectricity generating units. For other small and mediumsized hydroturbine plants, the aerating device design is referentially valuable.
Key wordshydraulic turbine   aeration valve   improvement   vibration   pressure fluctuation   
收稿日期: 2012-10-22; 出版日期: 2013-04-30
基金资助:

 国家自然科学基金资助项目(51279172); 四川省流体机械重点实验室开放研究基金资助项目(szjj2011-039,szjj2012-041)

通讯作者: 张海库(1983—),男,河南周口人,工程师(通信作者,158288639@qq.com),主要从事水机试验及结构分析研究.   
作者简介: 周涛(1983—),男,四川乐山人,工程师(zhk336@163.com),主要从事水电站运行和管理研究.
引用本文:   
周涛,张海库,朱晓敏等. 栗子坪电站水轮机补气装置改造[J]. 排灌机械工程学报, 2013, 31(4): 309-312.
ZHOU Tao,ZHANG Hai-Ku,ZHU Xiao-Min et al. Aeration valve improvement of Liziping hydropower plant Francis turbine[J]. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(4): 309-312.
 
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