3HAC0055-3
3HAC0055-3
3HAC0055-3
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〖廈門光沃自動化設(shè)備有限公司 竭誠為您服務(wù)〗
〖聯(lián)系人:歐先生 〗
〖手機(jī):18030229053(微信同號) 〗
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〖傳真:0592-5709825
【價(jià)格】如此低價(jià),僅此一家
【貨期】大量現(xiàn)貨,下單后即可發(fā)貨
【質(zhì)量】全新原裝,進(jìn)口***
【保障】產(chǎn)品經(jīng)過專業(yè)檢測,質(zhì)保一年,15天包退換
【品牌】Allen-Bradley羅克韋爾、ABB、本特利Bently 3500系統(tǒng)卡件、GE、艾默生西屋等模塊卡件
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對送水泵房中的2#泵與4#泵實(shí)施變頻節(jié)能改造,在已建成的送水泵房內(nèi)對兩組630kW/10kV電機(jī)機(jī)組添加變頻調(diào)速系統(tǒng)的改造,將原設(shè)計(jì)的轉(zhuǎn)子串級調(diào)速拆除改為高壓變頻器變頻調(diào)速。采用變頻器一拖二手動切換方式:(1)高壓供電回路使用舊電路。(2)采取恒壓變流形式來調(diào)節(jié)技改送水泵的轉(zhuǎn)速,將壓力維持在0.5MPa;(3)在MCC室并列安置原低壓供電設(shè)備及變頻柜。(4)增設(shè)10kV電力電纜,并更換Y560-8型電機(jī)1臺。(5)通過硬接線來實(shí)現(xiàn)與PLC控制系統(tǒng)的數(shù)據(jù)交換,可是必須將通訊接口保留下來,選用Profib-us-DP作為通訊協(xié)議。(6)調(diào)速范圍控制在20-50Hz。
對于一臺水泵來說,其水壓、流量和所需功率均會因葉輪轉(zhuǎn)速的改變而發(fā)生改變,它們之間的關(guān)系如下:
從上述關(guān)系可總結(jié)出如下結(jié)論:Q(水量)∝n(轉(zhuǎn)速);P(水壓)∝n(轉(zhuǎn)速);N(水泵軸功率)∝n(轉(zhuǎn)速),也就是說當(dāng)轉(zhuǎn)速發(fā)生改變時(shí),水壓、水量以及功率的變動速度也是各不相同的,而且功率的改變速率最大。當(dāng)轉(zhuǎn)速降至70%時(shí),水量也會隨之降至70%,可水壓會下降至49%、功率會下降至34.3%?梢,通過對水泵轉(zhuǎn)速進(jìn)行調(diào)節(jié),便可改變水壓和水量,無需對閥門進(jìn)行調(diào)節(jié)來改變管道的阻力特點(diǎn),這樣可以有效的減少節(jié)流損失,從而實(shí)現(xiàn)節(jié)能的效果。
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