液压气动与密封
液壓氣動與密封
액압기동여밀봉
Hydraulics Pneumatics & Seals
2015年
11期
50-52
,共3页
顶盖密封%水轮发电机组%改造%沟槽
頂蓋密封%水輪髮電機組%改造%溝槽
정개밀봉%수륜발전궤조%개조%구조
top cover seal%hydroelectric generating set%improvement%groove
目前,我国大型水电站的顶盖密封多采用"O形圈+挡圈"的密封结构形式.从三峡、向家坝等电站的水轮发电机组的运行情况来看,这种型式的密封无法满足使用要求,有些甚至存在较严重的漏水现象,给机组的安全运行带来了一定的隐患.利用创新的结构设计和合理的材料搭配,采用Y形圈+心形补偿圈的组合结构,形成多道密封.经实用验证,该密封是能够解决水轮发电机组顶盖密封失效问题的一种可靠密封.
目前,我國大型水電站的頂蓋密封多採用"O形圈+擋圈"的密封結構形式.從三峽、嚮傢壩等電站的水輪髮電機組的運行情況來看,這種型式的密封無法滿足使用要求,有些甚至存在較嚴重的漏水現象,給機組的安全運行帶來瞭一定的隱患.利用創新的結構設計和閤理的材料搭配,採用Y形圈+心形補償圈的組閤結構,形成多道密封.經實用驗證,該密封是能夠解決水輪髮電機組頂蓋密封失效問題的一種可靠密封.
목전,아국대형수전참적정개밀봉다채용"O형권+당권"적밀봉결구형식.종삼협、향가패등전참적수륜발전궤조적운행정황래간,저충형식적밀봉무법만족사용요구,유사심지존재교엄중적루수현상,급궤조적안전운행대래료일정적은환.이용창신적결구설계화합리적재료탑배,채용Y형권+심형보상권적조합결구,형성다도밀봉.경실용험증,해밀봉시능구해결수륜발전궤조정개밀봉실효문제적일충가고밀봉.
At present, seal structure of"O ring+back-up ring"is widely used in the top cover seal of large hydroelectric generating set in China. From the operation condition of the Three Gorges, Xiangjiaba power station of hydroelectric generating set, this type of seal is un-able to meet the requirements of sealing, some even have a large amount of leakage, it brought some hidden trouble to the safe operation of the unit. The use of innovative structure design and the reasonable matching material, composite structure using Y Ring+heart-shaped com-pensation ring, forming a plurality of sealing. By practical verification, this seal is one kind of reliable seal to solve the top cover seal failure problem for hydroelectric generating set.
