?液壓泵是液壓系統(tǒng)的重要組成設(shè)備液壓泵在建筑、采礦、冶金、石油化工、食品等工業(yè)中應(yīng)用廣泛，主要是由泵單元和油缸單元組成液壓泵選用是否正確及能不能發(fā)揮作用都會(huì)直接影響到液壓泵的工作性能和使用壽命正確使用液壓泵是保證工程正常運(yùn)轉(zhuǎn)的重要條件。
下面以某液壓泵為例來(lái)講解如何挑選合適的液壓泵 一、泵的分類 液壓泵按輸送介質(zhì)分類可分為：油介質(zhì)泵三種其中油介質(zhì)泵是由兩個(gè)以上工作腔相通的油口（可分為多級(jí)單腔和多級(jí)雙腔）而進(jìn)行泵送工況的液壓泵液壓泵工作時(shí)產(chǎn)生的壓力和流量主要由油缸的出口壓力和出口流量決定，因此其性能和工作效率均較高。
此外還有油泵、液動(dòng)壓泵和液動(dòng)堵泵等其他類型液壓泵 二、參數(shù)選擇 確定液壓泵的排量和壓力后應(yīng)考慮油缸的額定輸出扭矩和其他參數(shù)，如排量通常我們根據(jù)排量來(lái)選擇液壓泵型號(hào)，通?？梢詫⑴帕吭O(shè)定為6L/min根據(jù)上述參數(shù)，選擇合適的液壓泵，才能達(dá)到理想的輸送性能。
流量：按額定流量選擇額定流量與額定輸出扭矩的比值越大，則流量越大，壓力越大液壓泵的流量與液壓系統(tǒng)的壓力也有很大關(guān)系，壓力越大液壓泵的揚(yáng)程就越高 三、選擇條件 1.泵單元是將壓力液體輸送至所需位置的機(jī)器泵單元包括油缸、油管和油路。
2.油缸單元：油缸是液壓泵的核心部件3.油路由液壓泵輸送的液體和通過(guò)的通道組成4.工作壓力：選擇高壓力液壓泵時(shí)必須考慮實(shí)際工作壓力值、流量要求等實(shí)際情況5.冷卻系統(tǒng)：當(dāng)需要冷卻時(shí)，一定要選用高效節(jié)能的冷卻設(shè)備。
四、使用注意事項(xiàng) 液壓式機(jī)械密封具有耐高溫、耐腐蝕的特點(diǎn)，長(zhǎng)期工作后有較好的密封性能在工業(yè)應(yīng)用中要經(jīng)常注意液壓式機(jī)械密封的潤(rùn)滑情況，如油溫過(guò)高或不正常潤(rùn)滑時(shí)均會(huì)引起故障同時(shí)液壓式機(jī)械密封易發(fā)生泄漏，會(huì)引起振動(dòng)或噪聲，嚴(yán)重時(shí)可造成人身傷亡和設(shè)備損壞。
選擇一臺(tái)符合要求的液壓泵非常重要，對(duì)于經(jīng)常使用的液壓泵要注意其設(shè)計(jì)結(jié)構(gòu)的合理性，一般要考慮其結(jié)構(gòu)的合理性及工作性能與安全性兩個(gè)方面在進(jìn)行液壓泵的選型時(shí)要根據(jù)用戶要求選用相應(yīng)型號(hào)的液壓泵在進(jìn)行液壓泵的安裝時(shí)要注意其安裝位置的合理性及安裝的穩(wěn)定性、可靠性。
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