NEC PC-9821XB10
NEC PC-9821XB10
NEC PC-9821XB10
在實(shí)際工程設(shè)計(jì)與應(yīng)用中,為了保證大負(fù)荷時(shí)風(fēng)機(jī)或水泵系統(tǒng)滿足輸出要求,通常需要按系統(tǒng)的大輸出能力配備風(fēng)機(jī)水泵系統(tǒng),而真正使用中,絕大多數(shù)情況下并非需要系統(tǒng)在滿負(fù)荷下使用,而是根據(jù)負(fù)載的實(shí)際需要,通過流量控制元件如閥門或風(fēng)門擋板等,實(shí)現(xiàn)流量和壓力控制,以滿足生產(chǎn)過程的需要。
目前市場(chǎng)上的外資品牌通過模塊化設(shè)計(jì),種類、規(guī)格和質(zhì)量等方面都比較成熟,外資品牌在國(guó)內(nèi)變頻器市場(chǎng)的占有率很高,達(dá)到80%;但隨著我國(guó)制造業(yè)的升級(jí),本土品牌變頻器在技術(shù)上也日益成熟,但不論使用什么樣的變頻器,都需要注意安裝環(huán)境的通風(fēng)、清潔、安裝質(zhì)量、日常檢查和定期檢查,定期更換電容器、冷卻風(fēng)扇這些消耗器件,以提高使用可靠性。上海東島碳素化工有限公司使用的變頻器通過廠家定期維護(hù)的維修方式,使用近10年,都能安全運(yùn)行。
ACS503型變頻調(diào)速控制器運(yùn)行過程中性能表現(xiàn)較好,只是受附屬的外設(shè)和電網(wǎng)故障導(dǎo)致變頻器故障,且受廠家設(shè)備更新?lián)Q代的影響,出現(xiàn)設(shè)備故障后備件購(gòu)買困難且價(jià)格昂貴,主要部件損壞后基本無(wú)維修價(jià)值,目前已更新為ABB公司的ACS800―07―0260―3+P901+R712型變頻調(diào)速控制器,運(yùn)行安全可靠,調(diào)試方便,性能良好。因該類變頻調(diào)速控制器功能齊全,保護(hù)完善,安裝調(diào)試方便,基本實(shí)現(xiàn)免維護(hù)。建議成套設(shè)備制造廠家和使用單位無(wú)需增加不必要的外設(shè)。通用機(jī)械功能,免維護(hù),水阻比原有閥門配置小,免電力及其他介質(zhì)驅(qū)動(dòng)以及隨水泵自動(dòng)開啟和關(guān)閉、節(jié)能等特點(diǎn)。
針對(duì)出現(xiàn)故障的閥門,揭蓋進(jìn)行總成和密封件的更換,沒有易損件,維修也很方便。凌橋水廠在流體設(shè)備上所采用的節(jié)能產(chǎn)品主要是變頻器。采用調(diào)速技術(shù)的年代是比較晚的,主要是把時(shí)間消耗在對(duì)調(diào)速技術(shù)的學(xué)習(xí)上。
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