R902218653 A7VO55LRDS/63L-NZB01-S力士樂Rexroth柱塞泵

武漢百士自動化設備有限公司專注于液壓、氣動、工控自動化備件銷售，熱誠歡迎新老客戶咨詢購買！

柱塞泵是液壓系統的一個重要裝置。它依靠柱塞在缸體中往復運動，使密封工作容腔的容積發生變化來實現吸油、壓油。柱塞泵具有額定壓力高、結構緊湊、效率高和流量調節方便等優點，被廣應用于高壓、大流量和流量需要調節的場合，諸如液壓機、工程機械和船舶中。
柱塞泵一般分為單柱塞泵、臥式柱塞泵、軸向柱塞泵和徑向柱塞泵。
單柱塞泵
結構組成主要有偏心輪、柱塞、彈簧、缸體、兩個單向閥。柱塞與缸體孔之間形成密閉容積。偏心輪旋轉一轉，柱塞上下往復運動一次，向下運動吸油，向上運動排油。泵每轉一轉排出的油液體積稱為排量，排量只與泵的結構參數有關。
臥式柱塞泵是由幾個柱塞（一般為3個或6個）并列安裝，用1根曲軸通過連桿滑塊或由偏心軸直接推動柱塞做往復運動，實現吸、排液體的液壓泵。它們也都采用閥式配流裝置，而且大多為定量泵。煤礦液壓支架系統中的乳化液泵一般都是臥式柱塞泵。
乳化液泵用于采煤工作面，為液壓支架提供乳化液，工作原理靠曲軸的旋轉帶動活塞做往復運動，實現吸液和排液。
軸向柱塞泵（英文名：Piston pump）是活塞或柱塞的往復運動方向與缸體中心軸平行的柱塞泵。軸向柱塞泵利用與傳動軸平行的柱塞在柱塞孔內往復運動所產生的容積變化來進行工作的。由于柱塞和柱塞孔都是圓形零件，加工時可以達到很高的精度配合，因此容積效率高
直軸斜盤式柱塞泵分為壓力供油型和自吸油型兩種。壓力供油型液壓泵大都是采用有氣壓的油箱，靠氣壓供油的液壓油箱，在每次啟動機器之后，必須等液壓漬箱達到使用氣壓后，才能操作機械。如液壓油箱的氣壓不足時就啟動機器，會對液壓泵內的與滑靴造成拉脫現象，出會造成泵體內回程板與壓板的非正常磨損。
徑向柱塞泵可分為閥配流與軸配流兩大類。閥配流徑向柱塞泵存在故障率高、效率
柱塞泵
低等缺點。國際上70、80年代發展的軸配流徑向柱塞泵克服了閥配流徑向柱塞泵的不足。由于徑向泵結構上的特點，固定了軸配流徑向柱塞泵比軸向柱塞泵耐沖擊、壽命長、控制精度高。變量行程短泵的變量是在變量柱塞和限位柱塞作用下，改變定子的偏心距實現的，而定于的大偏心距為 5—9mm（根據排量大小不同），變量行程很短。且變量機構設計為高壓操縱，由控制閥進行控制。故該泵的響應速度快。徑向結構設計克服了如軸向柱塞泵滑靴偏磨的問題。使其抗沖擊能力大幅度提高。
液壓柱塞泵靠氣壓供油的液壓油箱，在每次啟動機器后，必須等液壓油箱達到使用氣壓后，才能操作機械。直軸斜盤式柱塞泵分為壓力供油型的自吸油型兩種。壓力供油型液壓泵大都采用有氣壓的油箱，也有液壓泵本身帶有補油分泵向液壓泵進油口提供壓力油的。自吸油型液壓泵的自吸油能力很強，無需外力供油。
柱塞泵分為軸向柱塞泵和徑向柱塞泵兩種代表性的結構形式；柱塞缸由于徑向柱塞泵
柱塞泵
屬于一種新型的技術含量比較高的高效泵，隨著國產化的不斷加快，徑向柱塞泵必然會成為柱塞泵應用領域的重要組成部分；具體詳見徑向柱塞泵百科，以下僅以軸向柱塞泵為例進行解釋。
軸向柱塞泵是利用與傳動軸平行的柱塞在柱塞孔內往復運動所產生的容積變化來進行工作的。由于柱塞和柱塞孔都是圓形零件，加工時可以達到很高的精度配合，因此具有容積效率高，運轉平穩，流量均勻性好，噪聲低，工作壓力高等優點，但對液壓油的污染較敏感，結構較復雜，造價較高

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