REXROTH柱塞泵，是由電動(dòng)機(jī)提供泵的動(dòng)力，經(jīng)鼓型齒聯(lián)軸器帶動(dòng)減速機(jī)轉(zhuǎn)動(dòng)。由減速機(jī)減速帶動(dòng)曲軸旋轉(zhuǎn)。通過曲柄連桿機(jī)構(gòu)，將旋轉(zhuǎn)運(yùn)動(dòng)轉(zhuǎn)變?yōu)槭诸^和柱塞為往復(fù)運(yùn)動(dòng)。當(dāng)柱塞向后死點(diǎn)移動(dòng)時(shí)，泵容積腔逐步增大，泵腔內(nèi)壓力降低，當(dāng)泵腔壓力低于進(jìn)口壓力時(shí)，吸入閥在進(jìn)口端壓力作用下開啟，液體被吸入；當(dāng)柱塞向前死點(diǎn)移動(dòng)時(shí)，泵腔內(nèi)壓力增大，此時(shí)吸入閥關(guān)閉，排出閥打開，液體被擠出液缸，達(dá)到了吸入和排出的目的。

      工作時(shí)，在噴油泵凸輪軸上的凸輪與柱塞彈簧的作用下，迫使柱塞作上、下往復(fù)運(yùn)動(dòng)，從而完成泵油任務(wù)，泵油過程可分為以下三個(gè)階段。

      結(jié)論：通過上述討論，得出下列結(jié)論

      ① 柱塞往復(fù)運(yùn)動(dòng)總行程L是不變的，由凸輪的升程決定。

      ② 柱塞每循環(huán)的供油量大小取決于供油行程，供油行程不受凸輪軸控制是可變的。

      ③ 供油開始時(shí)刻不隨供油行程的變化而變化。

      ④ 轉(zhuǎn)動(dòng)柱塞可改變供油終了時(shí)刻，從而改變供油量。

德國(guó)力士樂柱塞泵型號(hào)：

A10VSO18DFR1/31R-PPA12N00

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