一、機油泵常用的形式有哪兩種

汽車機(ji)油泵(beng)按照結構形式(shi)不同，分為兩大類(lei)型(xing)，分別是：

1、嚙合齒輪式機油泵

齒(chi)(chi)(chi)(chi)輪(lun)式機油泵由主(zhu)(zhu)動(dong)(dong)軸(zhou)、主(zhu)(zhu)動(dong)(dong)齒(chi)(chi)(chi)(chi)輪(lun)、從(cong)動(dong)(dong)軸(zhou)、從(cong)動(dong)(dong)齒(chi)(chi)(chi)(chi)輪(lun)、殼體等(deng)組成。兩個(ge)齒(chi)(chi)(chi)(chi)數相同的齒(chi)(chi)(chi)(chi)輪(lun)相互嚙合，裝在(zai)殼體內(nei)，齒(chi)(chi)(chi)(chi)輪(lun)與(yu)(yu)殼體的徑向和端面間隙(xi)很小。主(zhu)(zhu)動(dong)(dong)軸(zhou)與(yu)(yu)主(zhu)(zhu)動(dong)(dong)齒(chi)(chi)(chi)(chi)輪(lun)鍵連接，從(cong)動(dong)(dong)齒(chi)(chi)(chi)(chi)輪(lun)空套在(zai)從(cong)動(dong)(dong)軸(zhou)上。

工作時(shi)(shi)，主(zhu)動齒(chi)輪帶動從動齒(chi)輪反(fan)向旋轉(zhuan)。兩(liang)齒(chi)輪旋轉(zhuan)時(shi)(shi)，充滿在齒(chi)輪齒(chi)槽間的(de)機(ji)(ji)油(you)(you)(you)(you)沿油(you)(you)(you)(you)泵(beng)(beng)殼壁(bi)由進油(you)(you)(you)(you)腔(qiang)(qiang)帶到出(chu)(chu)油(you)(you)(you)(you)腔(qiang)(qiang)，在進油(you)(you)(you)(you)腔(qiang)(qiang)一(yi)側(ce)由于齒(chi)輪脫(tuo)開嚙合以及(ji)機(ji)(ji)油(you)(you)(you)(you)被(bei)不斷帶出(chu)(chu)而產生(sheng)(sheng)真(zhen)空，使(shi)油(you)(you)(you)(you)底殼內的(de)機(ji)(ji)油(you)(you)(you)(you)在大(da)氣壓力(li)作用下經集濾器進入(ru)進油(you)(you)(you)(you)腔(qiang)(qiang)，而在出(chu)(chu)油(you)(you)(you)(you)腔(qiang)(qiang)一(yi)側(ce)由于齒(chi)輪進入(ru)嚙合和機(ji)(ji)油(you)(you)(you)(you)被(bei)不斷帶入(ru)而產生(sheng)(sheng)擠壓作用，機(ji)(ji)油(you)(you)(you)(you)以一(yi)定壓力(li)被(bei)泵(beng)(beng)出(chu)(chu)。

一般嚙合齒(chi)輪式(shi)機油泵又分(fen)為內(nei)嚙合齒(chi)輪式(shi)機油泵與外嚙合齒(chi)輪式(shi)機油泵兩種類型。

2、轉子式機油泵

轉(zhuan)(zhuan)子(zi)(zi)(zi)式(shi)機(ji)(ji)油泵(beng)是利用(yong)內(nei)外(wai)轉(zhuan)(zhuan)子(zi)(zi)(zi)壓(ya)送潤滑油，又叫(jiao)次擺線齒(chi)輪泵(beng)。轉(zhuan)(zhuan)子(zi)(zi)(zi)式(shi)機(ji)(ji)油泵(beng)主要由內(nei)、外(wai)轉(zhuan)(zhuan)子(zi)(zi)(zi)，機(ji)(ji)油泵(beng)體(ti)及機(ji)(ji)油泵(beng)蓋等零件組成。主動(dong)的(de)內(nei)轉(zhuan)(zhuan)子(zi)(zi)(zi)和(he)從動(dong)的(de)外(wai)轉(zhuan)(zhuan)子(zi)(zi)(zi)都裝(zhuang)在(zai)機(ji)(ji)油泵(beng)殼(ke)體(ti)內(nei)。內(nei)轉(zhuan)(zhuan)子(zi)(zi)(zi)有四(si)個(ge)凸(tu)齒(chi)，外(wai)轉(zhuan)(zhuan)子(zi)(zi)(zi)有五個(ge)凹(ao)齒(chi)。內(nei)轉(zhuan)(zhuan)子(zi)(zi)(zi)固(gu)定在(zai)主動(dong)軸(zhou)上，外(wai)轉(zhuan)(zhuan)子(zi)(zi)(zi)在(zai)油泵(beng)殼(ke)體(ti)內(nei)可(ke)以自由轉(zhuan)(zhuan)動(dong)，兩者之(zhi)間有一定的(de)偏心距。

當油(you)(you)(you)泵工作(zuo)時，內(nei)(nei)轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)帶(dai)(dai)動外轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)向(xiang)(xiang)同一個(ge)方向(xiang)(xiang)轉(zhuan)(zhuan)(zhuan)(zhuan)動。由于兩個(ge)轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)的偏心距和齒形輪(lun)廓確保了內(nei)(nei)外轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)無論轉(zhuan)(zhuan)(zhuan)(zhuan)到任何角(jiao)度，各齒面(mian)之間(jian)總是線接(jie)觸，這樣內(nei)(nei)外轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)輪(lun)齒間(jian)便形成了四個(ge)工作(zuo)腔。由于內(nei)(nei)轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)的轉(zhuan)(zhuan)(zhuan)(zhuan)速大于外轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)的轉(zhuan)(zhuan)(zhuan)(zhuan)速（傳動比5：4），當某一工作(zuo)腔從(cong)進(jin)油(you)(you)(you)道轉(zhuan)(zhuan)(zhuan)(zhuan)過(guo)時，轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)脫開(kai)嚙合(he)，容(rong)積(ji)逐(zhu)漸增(zeng)大，產(chan)生真空度，潤(run)(run)滑油(you)(you)(you)便從(cong)進(jin)油(you)(you)(you)道被(bei)吸入。轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)繼續(xu)旋轉(zhuan)(zhuan)(zhuan)(zhuan)，潤(run)(run)滑油(you)(you)(you)被(bei)帶(dai)(dai)到出油(you)(you)(you)道另一側，這時轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)(zi)進(jin)入嚙合(he)，油(you)(you)(you)腔容(rong)積(ji)逐(zhu)漸減小，油(you)(you)(you)壓升高，使油(you)(you)(you)從(cong)齒間(jian)擠(ji)出，經出油(you)(you)(you)道送出。

二、齒輪式機油泵和轉子式機油泵哪個好

齒輪式機(ji)油(you)泵和轉子式機(ji)油(you)泵對比起(qi)來，各有各的特(te)點：

齒輪(lun)式機(ji)油(you)(you)(you)(you)泵(beng)由于結(jie)(jie)構簡單，制造較容易，并且(qie)工作可靠，是(shi)應用(yong)最為廣泛的一種機(ji)油(you)(you)(you)(you)泵(beng)。轉子式機(ji)油(you)(you)(you)(you)泵(beng)結(jie)(jie)構緊湊，吸油(you)(you)(you)(you)真空度較高，泵(beng)油(you)(you)(you)(you)量較大，且(qie)供油(you)(you)(you)(you)均勻(yun)，當機(ji)油(you)(you)(you)(you)泵(beng)安裝在曲軸箱(xiang)外(wai)且(qie)位置較高時，用(yong)此種機(ji)油(you)(you)(you)(you)泵(beng)較為合適。