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力士樂(lè)柱塞泵R910990406一級(jí)代理                                                                                             柱塞泵柱塞往復(fù)運(yùn)動(dòng)總行程L是不變的，由凸輪的升程決定,。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,。供油開(kāi)始時(shí)刻不隨供油行程的變化而變化。轉(zhuǎn)動(dòng)柱塞可改變供油終了時(shí)刻,，從而改變供油量,。柱塞泵工作時(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(guò)程可分為以下兩個(gè)階段,。
進(jìn)油過(guò)程
當(dāng)凸輪的凸起部分轉(zhuǎn)過(guò)去后，在彈簧力的作用下,，柱塞向下運(yùn)動(dòng),，柱塞上部空間（稱(chēng)為泵油室）產(chǎn)生真空度,，當(dāng)柱塞上端面把柱塞套上的進(jìn)油孔打開(kāi)后，充滿(mǎn)在油泵上體油道內(nèi)的柴油經(jīng)油孔進(jìn)入泵油室,，柱塞運(yùn)動(dòng)到下止點(diǎn),，進(jìn)油結(jié)束。
回油過(guò)程
柱塞向上供油,，當(dāng)上行到柱塞上的斜槽（停供邊）與套筒上的回油孔相通時(shí),，泵油室低壓油路便與柱塞頭部的中孔和徑向孔及斜槽溝通，油壓驟然下降,，出油閥在彈簧力的作用下迅速關(guān)閉,，停止供油。此后柱塞還要上行,，當(dāng)凸輪的凸起部分轉(zhuǎn)過(guò)去后,，在彈簧的作用下，柱塞又下行,。此時(shí)便開(kāi)始了下一個(gè)循環(huán),。                                                                                                                          A10V028DR/31R-PSC12N00
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A10VO45DFR1/31R-PSC62K02                                                                                                     力士樂(lè)柱塞泵R910990406一級(jí)代理