一、機油泵常用的形式有哪兩種

汽車(che)機(ji)油(you)泵按照結構形式不同(tong)，分(fen)為兩大類型，分(fen)別是(shi)：

1、嚙合齒輪式機油泵

齒(chi)(chi)輪式機(ji)油(you)泵由主(zhu)(zhu)動(dong)(dong)(dong)(dong)軸(zhou)、主(zhu)(zhu)動(dong)(dong)(dong)(dong)齒(chi)(chi)輪、從(cong)動(dong)(dong)(dong)(dong)軸(zhou)、從(cong)動(dong)(dong)(dong)(dong)齒(chi)(chi)輪、殼(ke)體等(deng)組成(cheng)。兩個(ge)齒(chi)(chi)數相(xiang)同(tong)的(de)齒(chi)(chi)輪相(xiang)互嚙合，裝在殼(ke)體內(nei)，齒(chi)(chi)輪與(yu)殼(ke)體的(de)徑向(xiang)和端面間隙很小(xiao)。主(zhu)(zhu)動(dong)(dong)(dong)(dong)軸(zhou)與(yu)主(zhu)(zhu)動(dong)(dong)(dong)(dong)齒(chi)(chi)輪鍵連(lian)接，從(cong)動(dong)(dong)(dong)(dong)齒(chi)(chi)輪空(kong)套(tao)在從(cong)動(dong)(dong)(dong)(dong)軸(zhou)上。

工作時，主動(dong)齒(chi)輪(lun)(lun)帶(dai)動(dong)從動(dong)齒(chi)輪(lun)(lun)反向旋(xuan)轉。兩(liang)齒(chi)輪(lun)(lun)旋(xuan)轉時，充滿在(zai)齒(chi)輪(lun)(lun)齒(chi)槽間的機油(you)沿(yan)油(you)泵殼(ke)壁(bi)由(you)進(jin)(jin)(jin)油(you)腔帶(dai)到出油(you)腔，在(zai)進(jin)(jin)(jin)油(you)腔一側由(you)于齒(chi)輪(lun)(lun)脫開嚙合以(yi)(yi)及機油(you)被(bei)不斷帶(dai)出而產生真空，使(shi)油(you)底(di)殼(ke)內的機油(you)在(zai)大(da)氣壓(ya)力作用(yong)下經集濾器進(jin)(jin)(jin)入進(jin)(jin)(jin)油(you)腔，而在(zai)出油(you)腔一側由(you)于齒(chi)輪(lun)(lun)進(jin)(jin)(jin)入嚙合和機油(you)被(bei)不斷帶(dai)入而產生擠(ji)壓(ya)作用(yong)，機油(you)以(yi)(yi)一定(ding)壓(ya)力被(bei)泵出。

一般嚙(nie)(nie)合齒輪式(shi)(shi)機油泵(beng)又分為內(nei)嚙(nie)(nie)合齒輪式(shi)(shi)機油泵(beng)與外嚙(nie)(nie)合齒輪式(shi)(shi)機油泵(beng)兩種類型。

2、轉子式機油泵

轉(zhuan)(zhuan)子(zi)(zi)式(shi)機(ji)油(you)泵(beng)(beng)(beng)(beng)是利用內(nei)(nei)外(wai)轉(zhuan)(zhuan)子(zi)(zi)壓送潤滑油(you)，又叫次(ci)擺線(xian)齒輪泵(beng)(beng)(beng)(beng)。轉(zhuan)(zhuan)子(zi)(zi)式(shi)機(ji)油(you)泵(beng)(beng)(beng)(beng)主要(yao)由內(nei)(nei)、外(wai)轉(zhuan)(zhuan)子(zi)(zi)，機(ji)油(you)泵(beng)(beng)(beng)(beng)體及機(ji)油(you)泵(beng)(beng)(beng)(beng)蓋等零件組成。主動(dong)的內(nei)(nei)轉(zhuan)(zhuan)子(zi)(zi)和(he)從動(dong)的外(wai)轉(zhuan)(zhuan)子(zi)(zi)都裝(zhuang)在機(ji)油(you)泵(beng)(beng)(beng)(beng)殼體內(nei)(nei)。內(nei)(nei)轉(zhuan)(zhuan)子(zi)(zi)有四個凸齒，外(wai)轉(zhuan)(zhuan)子(zi)(zi)有五個凹齒。內(nei)(nei)轉(zhuan)(zhuan)子(zi)(zi)固(gu)定在主動(dong)軸上，外(wai)轉(zhuan)(zhuan)子(zi)(zi)在油(you)泵(beng)(beng)(beng)(beng)殼體內(nei)(nei)可以自(zi)由轉(zhuan)(zhuan)動(dong)，兩(liang)者之間(jian)有一定的偏心距。

當油(you)泵工作時，內(nei)(nei)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)帶(dai)動(dong)外轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)向同一個方向轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)動(dong)。由(you)于(yu)兩個轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)的(de)偏心距和(he)齒形輪廓(kuo)確(que)保了(le)內(nei)(nei)外轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)無(wu)論轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)到任何角(jiao)度，各齒面之間總是線(xian)接觸，這樣內(nei)(nei)外轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)輪齒間便形成(cheng)了(le)四個工作腔。由(you)于(yu)內(nei)(nei)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)的(de)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速大于(yu)外轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)的(de)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速（傳動(dong)比5：4），當某一工作腔從(cong)進(jin)油(you)道(dao)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)過時，轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)脫(tuo)開嚙合(he)，容積逐漸(jian)增大，產生(sheng)真空度，潤滑油(you)便從(cong)進(jin)油(you)道(dao)被吸入(ru)。轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)繼(ji)續旋轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)，潤滑油(you)被帶(dai)到出(chu)油(you)道(dao)另一側，這時轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)進(jin)入(ru)嚙合(he)，油(you)腔容積逐漸(jian)減小，油(you)壓升高，使油(you)從(cong)齒間擠出(chu)，經出(chu)油(you)道(dao)送出(chu)。

二、齒輪式機油泵和轉子式機油泵哪個好

齒輪(lun)式(shi)機(ji)(ji)油(you)泵(beng)和轉子式(shi)機(ji)(ji)油(you)泵(beng)對(dui)比(bi)起(qi)來，各有各的特點：

齒輪式機(ji)油(you)(you)(you)泵(beng)由于(yu)結構簡單，制(zhi)造較容(rong)易，并且(qie)工(gong)作可(ke)靠，是應(ying)用最為廣泛(fan)的(de)一(yi)種(zhong)機(ji)油(you)(you)(you)泵(beng)。轉子式機(ji)油(you)(you)(you)泵(beng)結構緊湊，吸油(you)(you)(you)真空度較高，泵(beng)油(you)(you)(you)量較大，且(qie)供油(you)(you)(you)均勻，當機(ji)油(you)(you)(you)泵(beng)安裝在曲軸(zhou)箱外且(qie)位置較高時，用此種(zhong)機(ji)油(you)(you)(you)泵(beng)較為合(he)適。