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target="_blank"><strong>計量泵</strong></a>的配套性強(qiáng)、適應(yīng)介質(zhì)（液體）廣泛的優(yōu)勢尤為顯得特出。是一種可以滿足各種嚴(yán)格的工藝流程需要，用來輸送液體的特殊容積泵。材質(zhì)有很多常見的有塑料PVC和金屬不銹鋼材質(zhì)的，根據(jù)液力端的結(jié)構(gòu)型式，常將計量泵分成柱塞式、液壓隔膜式、機(jī)械隔膜式和電磁式計量泵等。</div><div>　　泵的流量調(diào)節(jié)是靠旋轉(zhuǎn)調(diào)節(jié)手輪，帶動調(diào)節(jié)螺桿轉(zhuǎn)動，從而改變弓型連桿間的間距，改變柱塞（活塞）在泵腔內(nèi)移動行程來決定流量的大小。一般是通過手輪調(diào)節(jié)絲杠行程以決定單位時間內(nèi)泵所排出的流量。在以往多數(shù)情況下，它的流量調(diào)節(jié)是靠人工完成，這種方法比較費事費力，而且工作環(huán)境很危險。</div><div>　　計量泵常用的流量調(diào)節(jié)方式有調(diào)節(jié)柱塞(或活塞)行程、調(diào)節(jié)柱塞往復(fù)次數(shù)或兼有以上兩種方式等三種方法，其中以調(diào)節(jié)行程的方式應(yīng)用較廣。該方法簡單、可靠，在小流量時仍能維持較高的計量精度。行程調(diào)節(jié)方式有以下三種。</div><div>　　①停車手動調(diào)節(jié)。在停車時手動調(diào)節(jié)計量泵的行程。</div><div>　?、谶\(yùn)轉(zhuǎn)中手動調(diào)節(jié)。在泵運(yùn)轉(zhuǎn)中改變軸向位移，以間接改變曲柄半徑，達(dá)到調(diào)節(jié)行程長度的目的。常用方式有N形曲軸調(diào)節(jié)、L形曲軸調(diào)節(jié)和偏心凸輪調(diào)節(jié)等。</div><div>　?、圻\(yùn)轉(zhuǎn)中自動調(diào)節(jié)。常見的有氣動控制和電動控制兩種。氣動控制是通過改變氣源壓力信號達(dá)到自動調(diào)節(jié)行程的目的。電動控制是通過改變信號達(dá)到自動調(diào)節(jié)行程的目的。</div> 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