中国农村水利水电
中國農村水利水電
중국농촌수이수전
CHINA RURAL WATER AND HYDROPOWER
2015年
8期
168-171,175
,共5页
孟弯弯%苏亮渊%李鹏犇%贾亚杰
孟彎彎%囌亮淵%李鵬犇%賈亞傑
맹만만%소량연%리붕분%가아걸
转动惯量%两阶段缓闭蝶阀%倒转转速%水锤压力%水锤防护
轉動慣量%兩階段緩閉蝶閥%倒轉轉速%水錘壓力%水錘防護
전동관량%량계단완폐접벌%도전전속%수추압력%수추방호
rotational inertia%two-stage slow-closing butterfly valve%reverse rotate speed%water hammer pressure%water hammer protection
转动惯量不仅是描述水泵机组运行状况的重要参数，也是进行输水系统水力过渡过程分析、安全防护研究和优化设计的重要技术参数，对停泵水锤计算具有很大影响。论文以吉县东城提黄灌溉工程一级泵站为研究对象，利用水锤计算软件对其突然停泵过程进行模拟计算，分析无阀和两阶段缓闭蝶阀作用下不同转动惯量对其水力过渡过程的影响。模拟结果证实无阀和两阶段缓闭蝶阀作用时增大机组转动惯量可以有效减少水锤升压和降低水泵倒转转速，且随着转动惯量持续增大，减压效果和降低水泵倒转转速越发不显著；两阶段缓闭蝶阀作用时，会在一定程度上增大水锤升压，且可能减弱增加机组转动惯量的降压效果。调节水泵转动惯量对于输水管线水锤防护既经济又有效，对于推动水锤防护措施的发展具有一定的意义。
轉動慣量不僅是描述水泵機組運行狀況的重要參數，也是進行輸水繫統水力過渡過程分析、安全防護研究和優化設計的重要技術參數，對停泵水錘計算具有很大影響。論文以吉縣東城提黃灌溉工程一級泵站為研究對象，利用水錘計算軟件對其突然停泵過程進行模擬計算，分析無閥和兩階段緩閉蝶閥作用下不同轉動慣量對其水力過渡過程的影響。模擬結果證實無閥和兩階段緩閉蝶閥作用時增大機組轉動慣量可以有效減少水錘升壓和降低水泵倒轉轉速，且隨著轉動慣量持續增大，減壓效果和降低水泵倒轉轉速越髮不顯著；兩階段緩閉蝶閥作用時，會在一定程度上增大水錘升壓，且可能減弱增加機組轉動慣量的降壓效果。調節水泵轉動慣量對于輸水管線水錘防護既經濟又有效，對于推動水錘防護措施的髮展具有一定的意義。
전동관량불부시묘술수빙궤조운행상황적중요삼수，야시진행수수계통수력과도과정분석、안전방호연구화우화설계적중요기술삼수，대정빙수추계산구유흔대영향。논문이길현동성제황관개공정일급빙참위연구대상，이용수추계산연건대기돌연정빙과정진행모의계산，분석무벌화량계단완폐접벌작용하불동전동관량대기수력과도과정적영향。모의결과증실무벌화량계단완폐접벌작용시증대궤조전동관량가이유효감소수추승압화강저수빙도전전속，차수착전동관량지속증대，감압효과화강저수빙도전전속월발불현저；량계단완폐접벌작용시，회재일정정도상증대수추승압，차가능감약증가궤조전동관량적강압효과。조절수빙전동관량대우수수관선수추방호기경제우유효，대우추동수추방호조시적발전구유일정적의의。
Rotational inertia of pumping units is not only the essential parameter to describe the running state of pump ,but also the significant parameter on an analysis of hydraulic transient ,research on safety protection and optimal design ,which has a great influ‐ence on the pump-stopping water hammer calculation .This paper has studied the First Pump Station of Ji-xian County's eastern yellow irrigation project ,made use of water hammer computing software to simulate hydraulic transient of pumps at sudden power failure ,and analyzed the connection between different rotational inertia and hydraulic transient under two-stage slow-closing butterfly valve and no valve conditions .The results show that increasing rotational inertia of pumping unit under no valve and two-stage slow-closing butterfly valve conditions ,can reduce water hammer pressure and decrease the reverse rotate speed of pumps ,and as rota‐tion inertia is growing ,decompression effect and pump reverse rotate speed reduction are weakened .Under two-stage slow-closing butterfly valve conditions ,water hammer pressure is increasing to a certain degree ,which may have a bad effect on decreasing the water hammer pressure made by increasing rotational inertia of the pump .Adjusting rotational inertia of the pump in water hammer protection is economical and effective ,which will promote the development of water hammer protection measures .
