1756-BA1產(chǎn)品描述：
1756-BA1
廈門卡庫(kù)電氣詢價(jià)QQ；1093230189
建筑吊運(yùn)設(shè)備
建筑吊運(yùn)設(shè)備按吊運(yùn)的性質(zhì)可分為：簡(jiǎn)單吊運(yùn)器具：如千斤頂、滑輪組、葫蘆、卷?yè)P(yáng)機(jī)、懸掛單軌等；起重機(jī)：常用的起重機(jī)有流動(dòng)式起重機(jī)、塔式起重機(jī)、桅桿式起重機(jī)。建筑吊運(yùn)設(shè)備按結(jié)構(gòu)形式可分為：橋架式（橋式起重機(jī)、門式起重機(jī)）；纜索式；臂架式（自行式、塔式、門座式、鐵路式、浮船式等）。
而在建筑行業(yè)中使用最多的吊運(yùn)設(shè)備為塔式起重機(jī)，其適用于在范圍內(nèi)數(shù)量多、而每一件單件重量較小的構(gòu)件或設(shè)備的吊運(yùn)，并其作業(yè)周期長(zhǎng)。目前，塔式起重機(jī)吊運(yùn)的能力在3噸至100噸之間，而其臂長(zhǎng)能達(dá)到40米至80米，所以，塔式起重機(jī)常用在使用地點(diǎn)固定、使用周期較長(zhǎng)的場(chǎng)合，較為經(jīng)濟(jì)。塔式起重機(jī)有起升、回轉(zhuǎn)、變幅、運(yùn)行、頂升、電纜卷放等機(jī)構(gòu)，各個(gè)機(jī)構(gòu)的負(fù)載特點(diǎn)區(qū)別很大。如起升機(jī)構(gòu)為位能負(fù)載，負(fù)荷不變時(shí)為恒轉(zhuǎn)矩，上升時(shí)為阻力負(fù)載，下降時(shí)為動(dòng)力負(fù)載；回轉(zhuǎn)、變幅則主要傳遞水平負(fù)荷，起動(dòng)、制動(dòng)時(shí)要客服較大的慣性。負(fù)載特點(diǎn)不同，在選擇電機(jī)、確定傳動(dòng)方案和調(diào)速方法，操作使用方面也要有不同的要求。同時(shí)，由于建筑工地戶外條件惡劣，電源質(zhì)量不佳，外部環(huán)境影響大，檢查維修較困難，因此對(duì)建筑吊運(yùn)設(shè)備電氣系統(tǒng)的可靠性即為重要。
變頻調(diào)速
變頻調(diào)速器是一種高科技電子電力元器件集成的電機(jī)拖動(dòng)裝置，理論上可以無(wú)級(jí)調(diào)速。而且變頻調(diào)速是從恒轉(zhuǎn)矩到恒功率進(jìn)行全方位調(diào)速，設(shè)定一個(gè)頻率就有一個(gè)對(duì)應(yīng)速度，電控系統(tǒng)是以負(fù)載工作的實(shí)時(shí)變化要求為基礎(chǔ)進(jìn)行設(shè)計(jì)的，因此需要對(duì)負(fù)載和電機(jī)的特性進(jìn)行全面的計(jì)算。頻率f≤50Hz時(shí)電機(jī)以恒轉(zhuǎn)矩的狀態(tài)運(yùn)行，頻率f>50Hz時(shí)電機(jī)以恒功率的狀態(tài)運(yùn)行。圖1中不同頻率的機(jī)械特性曲線清楚地表明，不同的負(fù)載(轉(zhuǎn)矩比)可以有咒種速度運(yùn)行，完全能夠滿足輕載高速、重載低速的要求。
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