一、機油泵常用的形式有哪兩種

汽(qi)車機油泵按照結(jie)構(gou)形式不同，分(fen)為兩大類型，分(fen)別是：

1、嚙合齒輪式機油泵

齒(chi)(chi)輪式機油(you)泵由(you)主(zhu)動(dong)(dong)(dong)軸、主(zhu)動(dong)(dong)(dong)齒(chi)(chi)輪、從動(dong)(dong)(dong)軸、從動(dong)(dong)(dong)齒(chi)(chi)輪、殼體等組成。兩個齒(chi)(chi)數相(xiang)同(tong)的齒(chi)(chi)輪相(xiang)互嚙合，裝在殼體內，齒(chi)(chi)輪與殼體的徑向(xiang)和端面間隙(xi)很小(xiao)。主(zhu)動(dong)(dong)(dong)軸與主(zhu)動(dong)(dong)(dong)齒(chi)(chi)輪鍵連接，從動(dong)(dong)(dong)齒(chi)(chi)輪空套在從動(dong)(dong)(dong)軸上。

工(gong)作時，主動(dong)(dong)齒輪帶(dai)(dai)動(dong)(dong)從動(dong)(dong)齒輪反向(xiang)旋轉(zhuan)。兩齒輪旋轉(zhuan)時，充滿在齒輪齒槽間的(de)機(ji)(ji)油(you)(you)(you)(you)沿油(you)(you)(you)(you)泵殼壁由(you)進(jin)油(you)(you)(you)(you)腔帶(dai)(dai)到出(chu)油(you)(you)(you)(you)腔，在進(jin)油(you)(you)(you)(you)腔一側由(you)于齒輪脫(tuo)開嚙(nie)合以及機(ji)(ji)油(you)(you)(you)(you)被(bei)不斷帶(dai)(dai)出(chu)而(er)產生(sheng)真空，使油(you)(you)(you)(you)底殼內的(de)機(ji)(ji)油(you)(you)(you)(you)在大氣(qi)壓力作用下(xia)經集濾器進(jin)入進(jin)油(you)(you)(you)(you)腔，而(er)在出(chu)油(you)(you)(you)(you)腔一側由(you)于齒輪進(jin)入嚙(nie)合和機(ji)(ji)油(you)(you)(you)(you)被(bei)不斷帶(dai)(dai)入而(er)產生(sheng)擠壓作用，機(ji)(ji)油(you)(you)(you)(you)以一定壓力被(bei)泵出(chu)。

一般嚙合(he)(he)齒輪式機油(you)泵(beng)又分為內嚙合(he)(he)齒輪式機油(you)泵(beng)與外嚙合(he)(he)齒輪式機油(you)泵(beng)兩種類(lei)型。

2、轉子式機油泵

轉(zhuan)子(zi)(zi)(zi)(zi)式機(ji)油(you)泵是利用內(nei)(nei)(nei)外轉(zhuan)子(zi)(zi)(zi)(zi)壓送潤(run)滑油(you)，又叫次擺線齒輪泵。轉(zhuan)子(zi)(zi)(zi)(zi)式機(ji)油(you)泵主要由內(nei)(nei)(nei)、外轉(zhuan)子(zi)(zi)(zi)(zi)，機(ji)油(you)泵體及(ji)機(ji)油(you)泵蓋等零件組成。主動的內(nei)(nei)(nei)轉(zhuan)子(zi)(zi)(zi)(zi)和(he)從動的外轉(zhuan)子(zi)(zi)(zi)(zi)都裝(zhuang)在(zai)機(ji)油(you)泵殼體內(nei)(nei)(nei)。內(nei)(nei)(nei)轉(zhuan)子(zi)(zi)(zi)(zi)有(you)四個凸齒，外轉(zhuan)子(zi)(zi)(zi)(zi)有(you)五個凹齒。內(nei)(nei)(nei)轉(zhuan)子(zi)(zi)(zi)(zi)固定在(zai)主動軸上，外轉(zhuan)子(zi)(zi)(zi)(zi)在(zai)油(you)泵殼體內(nei)(nei)(nei)可以自由轉(zhuan)動，兩者之(zhi)間有(you)一定的偏心距。

當油(you)(you)泵工作時(shi)，內轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)帶動(dong)外轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)向同(tong)一個方向轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)動(dong)。由于(yu)兩個轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)的(de)偏心距和齒(chi)形(xing)輪(lun)廓確保了內外轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)無論(lun)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)到任何角度，各齒(chi)面(mian)之間總是線接觸，這(zhe)樣內外轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)輪(lun)齒(chi)間便形(xing)成(cheng)了四個工作腔(qiang)。由于(yu)內轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)的(de)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速大于(yu)外轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)的(de)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速（傳動(dong)比5：4），當某(mou)一工作腔(qiang)從(cong)進(jin)油(you)(you)道(dao)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)過時(shi)，轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)脫開嚙(nie)合，容(rong)積逐漸(jian)(jian)增大，產生真空度，潤滑油(you)(you)便從(cong)進(jin)油(you)(you)道(dao)被(bei)吸入(ru)。轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)繼(ji)續(xu)旋轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)，潤滑油(you)(you)被(bei)帶到出(chu)(chu)(chu)油(you)(you)道(dao)另一側(ce)，這(zhe)時(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)進(jin)入(ru)嚙(nie)合，油(you)(you)腔(qiang)容(rong)積逐漸(jian)(jian)減小，油(you)(you)壓(ya)升高，使油(you)(you)從(cong)齒(chi)間擠出(chu)(chu)(chu)，經出(chu)(chu)(chu)油(you)(you)道(dao)送出(chu)(chu)(chu)。

二、齒輪式機油泵和轉子式機油泵哪個好

齒輪式機油泵和(he)轉(zhuan)子(zi)式機油泵對比起來，各有各的特點：

齒輪(lun)式機油(you)(you)泵由于(yu)結構簡單，制造較(jiao)容易(yi)，并且(qie)工作可靠，是應用最為廣(guang)泛的一種(zhong)機油(you)(you)泵。轉(zhuan)子式機油(you)(you)泵結構緊(jin)湊，吸油(you)(you)真空度較(jiao)高(gao)，泵油(you)(you)量較(jiao)大，且(qie)供油(you)(you)均勻，當機油(you)(you)泵安(an)裝在曲軸箱外且(qie)位置較(jiao)高(gao)時(shi)，用此種(zhong)機油(you)(you)泵較(jiao)為合適。