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熔體泵的傳到系統(tǒng)優(yōu)劣分析
來(lái)源： 發(fā)布時(shí)間：2016-12-06 14:09:35 瀏覽次數(shù)：次
傳動(dòng)系統(tǒng)是熔體泵及其輸運(yùn)裝置的主要組成部分之一，它的主要作用是驅(qū)動(dòng)熔體泵的主動(dòng)軸，使其獲得必需的扭矩并且能均勻的旋轉(zhuǎn)。傳動(dòng)系統(tǒng)通常由電機(jī)、減速裝置和調(diào)速裝盆三部分組成。
由于電機(jī)分為交流、直流兩大類，與此相對(duì)應(yīng)，電力驅(qū)動(dòng)系統(tǒng)也分為交流調(diào)速系統(tǒng)和直流調(diào)速系統(tǒng)兩大類型，除了直流調(diào)速系統(tǒng)、交流變頻調(diào)速系統(tǒng)外，應(yīng)用廣泛的還有伺服電機(jī)和相應(yīng)的伺服調(diào)速系統(tǒng)。
直流電動(dòng)機(jī)轉(zhuǎn)矩易于控制，具有良好的起制動(dòng)性能，適于在大范圍內(nèi)平滑調(diào)速。在相當(dāng)長(zhǎng)的時(shí)間內(nèi)，一直在高性能調(diào)速領(lǐng)域占有絕對(duì)的統(tǒng)治地位，但也有固有的缺點(diǎn)，即機(jī)械式換向器帶來(lái)的弊端，其主要缺點(diǎn)是：1、維修工作里大，事故率高。2、容量、電壓、電流和轉(zhuǎn)速的上限值，均受到換向條件的制約，在一些大容量、特大容量的領(lǐng)域中無(wú)法應(yīng)用。3、使用環(huán)境受限，特別是在易爆易嫩場(chǎng)合，難以應(yīng)用。
除此之外，直流電機(jī)在速度低于100-200r/min時(shí)，有工作不穩(wěn)定和電機(jī)風(fēng)扇性能下降的缺點(diǎn)，而熔體泵的轉(zhuǎn)速通常低于100r/min。與直流電機(jī)相比，交流電機(jī)有以下優(yōu)點(diǎn)：1、容、電壓、電流和轉(zhuǎn)速不像直流電動(dòng)機(jī)那樣受到限制；2、結(jié)構(gòu)簡(jiǎn)單，造價(jià)低；3、耐用、事故率低而且容易操作。其大的缺點(diǎn)在調(diào)速方面，但隨著變頻調(diào)速性能的完善，交流調(diào)速系統(tǒng)的性能已經(jīng)和直流調(diào)速系統(tǒng)相匹配，甚至可以超過(guò)直流調(diào)速系統(tǒng)，交流調(diào)速傳動(dòng)己經(jīng)成為電機(jī)調(diào)速的主流。
巴特國(guó)內(nèi)專業(yè)熔體泵制造商，在熔體泵應(yīng)用技術(shù)方面積累了豐富經(jīng)驗(yàn)。近年來(lái)，根據(jù)世界熔體泵應(yīng)用技術(shù)的發(fā)展趨勢(shì)，特別是在塑料、橡膠精密擠出領(lǐng)域里，研發(fā)新型熔體泵設(shè)備。計(jì)量泵：www.www.bjxbb.com
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