A10VSO140DR/31R-PPB12N00 Rexroth柱塞泵是上海韋米機電設備有限公司主營產品之一，【德國力士樂Rexroth原裝正品，特價現貨供應】；銷售熱線：021-61116913；聯系人：雷青；在線QQ：2896079243；移動熱線：13296124913；上海優(yōu)質供應商，原裝正品，價格優(yōu)惠，常規(guī)產品現貨供應。歡迎新老客戶來電咨詢采購！
液壓泵是液壓系統(tǒng)的動力元件，是靠發(fā)動機或電動機驅動，從液壓油箱中吸入油液，形成壓力油排出，送到執(zhí)行元件的一種元件。液壓泵按結構分為齒輪泵、柱塞泵、葉片泵和螺桿泵
液壓泵為液壓傳動提供加壓液體的一種液壓元件，是泵的一種。它的功能是把動力機（如電動機和內燃機等）的機械能轉換成液體的壓力能。影響液壓泵的使用壽命因素很多，除了泵自身設計、制造因素外和一些與泵使用相關元（如聯軸器、濾油器等）的選用、試車運行過程中的操作等也有關。
上海韋米機電設備有限公司位于浦東金橋是全國工業(yè)傳動流體自動化領域實力較強的經銷代理商，有著豐富的氣動液壓技術服務、工業(yè)銷售及國際采購的經驗，主營產品涉及液壓泵閥（電磁閥、柱塞泵拳頭產品）、工控產品、驅動模塊、伺服電機、可編程控制器PLC、數控傳動、傳感器系列、電源、氣動元件、工業(yè)儀器儀表。具體主要經營品牌及產品如下:
博世力士樂rexroth工業(yè)液壓氣動元件大量現貨（電磁換向閥、節(jié)流閥、單向閥、比例閥、伺服閥、安全溢流閥、流量控制閥、減壓閥、調節(jié)閥、壓力繼電器、比例放大板、放大器，軸向柱塞泵、葉片泵、齒輪泵，伺服驅動器、伺服電機，氣動元件、氣動閥、氣缸等），部分系列型號：
電磁閥：4WE6、4WE10、4WE16；電液閥：4WEH10H、4WEH16、4WEH25，
單向閥：S10A、S20A、Z1S、Z2S、SL10、SL20、SV10、SV20、RVP，插裝閥：LC、LFA
溢流閥：DB、DBW、DBET、DBD、ZDB、Z2DB，減壓閥：DR6DP、DR10DP、ZDR6、ZDR10、DR-4X、DR-5X
節(jié)流閥：Z2FS6、Z2FS10、Z2FS16、Z2FS22；調速閥：2FRM5、2FRM10、2FRM16，
平衡閥：FD12FA、FD12PA、FD12KA、FD16FA，繼電器：HED80、HED40，電子單元：VT、0811
比例方向閥：4WRA、4WRAE、4WRE、4WREE、4WREEM、4WRH、4WRZ、4WRZE、4WRKE、4WRBKE、4WS2EM
高頻響方向閥：4WRPH、4WRPEH、5WRP、5WRPE、4WRREH、4WRP、4WRPE、4WRP(E)H、4WRSE、4WRSEH、4WRPNH、4WRL、4WRLE、4WRVE、4WRGE、4WRL、4WRLE、4WRDE、3WRCBH，伺服系統(tǒng)：HAS、HNL、HCS、HNL
柱塞泵：A4VSO、A10VSO、A2FO，定量馬達：A2FM，A4FM，A10FM/E， 齒輪泵：0510、AZPF，葉片泵：PV7
意大利阿托斯ATOS及迪普馬DUPLOMATIC、美國Parker派克及EATON VICKERS伊頓 威格士液壓、日本YUKEN油研泵閥優(yōu)勢現貨系列（電磁閥換向閥、壓力開關、柱塞泵、齒輪泵、比例閥、截止閥、開關閥等），
奧地利貝加萊B&R br-automation自動化配品配件貨期短現貨多（伺服驅動器、觸摸屏、工控機、CPU模塊、總線控制器、X20\2003\2005\2010系統(tǒng)中各類功能模塊等），
美國本特利(Bently Nevada)優(yōu)勢系列（監(jiān)測模塊、前置器、儀表框架、接口模塊、延伸電纜、傳感器探頭、轉速表、校驗儀等）
西門子Siemens優(yōu)勢主打系列（6SN、6FC、6FX、S7200、電機1FK、S7300、S7400、LOGO 低壓電器、軟啟、熔斷器、電源模塊、CPU、數控傳動）
另銷售有德國愛爾泰克Airtec氣動元件，APS接近開關，SMC氣動元件，倍加福編碼器、傳感器，歐姆龍低壓電器、川崎K3V泵 ，賀德克液壓元件、丹佛斯、費斯托全系列產品.
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常用液壓泵的種類：
1、按流量是否可調節(jié)可分為：變量泵和定量泵。輸出流量可以根據需要來調節(jié)的稱為變量泵，流量不能調節(jié)的稱為定量泵。
2、按液壓系統(tǒng)中常用的泵結構分為：齒輪泵、葉片泵和柱塞泵3種。
齒輪泵：體積較小，結構較簡單，對油的清潔度要求不嚴，價格較便宜；但泵軸受不平衡力，磨損嚴重，泄漏較大。
葉片泵：分為雙作用葉片泵和單作用葉片泵。這種泵流量均勻、運轉平穩(wěn)、噪音小、作壓力和容積效率比齒輪泵高、結構比齒輪泵復雜。
液壓泵內部結構圖
液壓泵內部結構圖
柱塞泵：容積效率高、泄漏小、可在高壓下工作、大多用於大功率液壓系統(tǒng)；但結構復雜，材料和加工精度要求高、價格貴、對油的清潔度要求高。
一般在齒輪泵和葉片泵不能滿足要求時才用柱塞泵。還有一些其他形式的液壓泵，如螺桿泵等，但應用不如上述3種普遍。
液壓泵特點
鋁合金制造、強度高、耐腐蝕、重量輕、適合各種環(huán)境下作業(yè)。
雙速特性減少了打壓次數，在低壓室快速處于負載用功狀態(tài)，立刻轉換成高壓，縮短每次作業(yè)周期。
配有壓力調節(jié)閥，可調節(jié)控制及設定工作壓力。
液壓泵原理
是為液壓傳動提供加壓液體的一種液壓元件，是泵的一種。它的功能是把動力機(如電動機和內燃機等)的機械能轉換成液體的壓力能。圖中為單柱塞泵的工作原理。凸輪由電動機帶動旋轉。當凸輪推動柱塞向上運動時，柱塞和缸體形成的密封體積減小，油液從密封體積中擠出，經單向閥排到需要的地方去。當凸輪旋轉至曲線的下降部位時，彈簧迫使柱塞向下，形成一定真空度，油 箱中的油液在大氣壓力的作用下進入密封容積。凸 輪使柱塞不斷地升降，密封容積周期性地減小和增 大，泵就不斷吸油和排油。
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液壓泵是液壓系統(tǒng)的動力元件，其功用是給液壓系統(tǒng)提供壓力油，從能量轉換角度講，它將是原動機（如發(fā)動機）輸出的機械能轉換為便于輸送的液體的壓力能。液壓馬達則屬于執(zhí)行元件，它能將輸入液體的壓力能轉換為輸出軸轉動的機械能，用來拖動負載做功。根據結構形式，液壓泵與液壓馬達具體可分為齒輪式、葉片式、柱塞式等類型。
1.液壓泵壓力
液壓泵工作壓力是指泵（或馬達）在實際工作時輸出（或輸入）油液的壓力，由外負載決定。
額定壓力是指在正常工作條件下，按試驗標準規(guī)定能連續(xù)運轉的最高壓力。其大小受壽命的限制，若超過額定壓力工作，泵（或馬達）的使用壽命將會比設計的壽命短。當工作壓力大于額定壓力時稱超載。
2.轉速
工作轉速是指泵（或馬達）在工作時的實際轉動速度。
額定轉速是指在額定壓力下，能連續(xù)長時間正常運轉的最高轉速。若泵超過額定轉速工作將會造成吸油不足，產生振動和大的噪聲，零件會遭受氣蝕損傷，壽命降低。
最低穩(wěn)定轉速是指馬達正常運轉所允許的最低轉速。在此轉速下，馬達不出現爬行現象。
3.排量、流量
排量是指泵（或馬達）每轉一周，由密封容腔幾何尺寸變化而得的排出（或輸入）液體的體積，常用單位是ml/r（毫升/轉）。排量可以通過調節(jié)發(fā)生變化的成為變量泵（或變量馬達），排量不能變化的成為定量泵（或定量馬達）。
實際流量是指泵（或馬達）工作時出口處（或進口處）的流量。由于泵本身存在內泄漏，其實際流量小于理論流量。由于馬達本身也存在內泄漏，要實現指定轉速，為補償泄漏量，其輸入實際流量必須大于理論流量。
4.效率
容積效率，對液壓泵是指其實際流量與理論流量的比值。對液壓馬達是指其理論流量與實際流量的比值。
機械效率，對液壓泵是指其理論轉矩與實際輸入轉矩的比值。對液壓馬達其實際輸出的轉矩為理論轉矩克服摩擦力后的轉矩，因此其機械效率為實際輸出轉矩與理論轉矩的比值。
總效率是指泵（或馬達）的輸出功率與輸入功率的比值。總效率等于容積效率與機械效率的乘積。
