一、機油泵常用的形式有哪兩種

汽車機油泵(beng)按(an)照結(jie)構形式不同，分(fen)為兩大類型，分(fen)別是：

1、嚙合齒輪式機油泵

齒(chi)(chi)(chi)輪(lun)(lun)(lun)式機油泵由主動(dong)(dong)(dong)軸、主動(dong)(dong)(dong)齒(chi)(chi)(chi)輪(lun)(lun)(lun)、從(cong)動(dong)(dong)(dong)軸、從(cong)動(dong)(dong)(dong)齒(chi)(chi)(chi)輪(lun)(lun)(lun)、殼體等(deng)組成。兩個齒(chi)(chi)(chi)數相同的齒(chi)(chi)(chi)輪(lun)(lun)(lun)相互(hu)嚙合，裝在殼體內(nei)，齒(chi)(chi)(chi)輪(lun)(lun)(lun)與殼體的徑向(xiang)和端面(mian)間隙很小(xiao)。主動(dong)(dong)(dong)軸與主動(dong)(dong)(dong)齒(chi)(chi)(chi)輪(lun)(lun)(lun)鍵連接，從(cong)動(dong)(dong)(dong)齒(chi)(chi)(chi)輪(lun)(lun)(lun)空套在從(cong)動(dong)(dong)(dong)軸上。

工作(zuo)時，主動齒輪(lun)帶(dai)(dai)動從動齒輪(lun)反向旋(xuan)(xuan)轉(zhuan)。兩齒輪(lun)旋(xuan)(xuan)轉(zhuan)時，充滿在齒輪(lun)齒槽間的機油沿油泵殼(ke)壁由進油腔(qiang)(qiang)帶(dai)(dai)到出(chu)(chu)油腔(qiang)(qiang)，在進油腔(qiang)(qiang)一(yi)側(ce)由于(yu)齒輪(lun)脫開(kai)嚙(nie)合以(yi)(yi)及機油被不斷(duan)帶(dai)(dai)出(chu)(chu)而(er)產(chan)(chan)生真空，使(shi)油底殼(ke)內的機油在大氣壓(ya)(ya)力作(zuo)用下經集(ji)濾器進入進油腔(qiang)(qiang)，而(er)在出(chu)(chu)油腔(qiang)(qiang)一(yi)側(ce)由于(yu)齒輪(lun)進入嚙(nie)合和機油被不斷(duan)帶(dai)(dai)入而(er)產(chan)(chan)生擠壓(ya)(ya)作(zuo)用，機油以(yi)(yi)一(yi)定壓(ya)(ya)力被泵出(chu)(chu)。

一般(ban)嚙合(he)齒輪式(shi)(shi)機油泵又分為內嚙合(he)齒輪式(shi)(shi)機油泵與(yu)外嚙合(he)齒輪式(shi)(shi)機油泵兩(liang)種類型。

2、轉子式機油泵

轉(zhuan)子(zi)(zi)式機(ji)油(you)泵是利用(yong)內(nei)(nei)(nei)(nei)外(wai)(wai)轉(zhuan)子(zi)(zi)壓送潤滑油(you)，又叫(jiao)次擺線齒(chi)輪(lun)泵。轉(zhuan)子(zi)(zi)式機(ji)油(you)泵主(zhu)要由(you)內(nei)(nei)(nei)(nei)、外(wai)(wai)轉(zhuan)子(zi)(zi)，機(ji)油(you)泵體及機(ji)油(you)泵蓋等(deng)零件(jian)組成。主(zhu)動(dong)的內(nei)(nei)(nei)(nei)轉(zhuan)子(zi)(zi)和從(cong)動(dong)的外(wai)(wai)轉(zhuan)子(zi)(zi)都裝(zhuang)在(zai)機(ji)油(you)泵殼(ke)體內(nei)(nei)(nei)(nei)。內(nei)(nei)(nei)(nei)轉(zhuan)子(zi)(zi)有四(si)個凸齒(chi)，外(wai)(wai)轉(zhuan)子(zi)(zi)有五個凹齒(chi)。內(nei)(nei)(nei)(nei)轉(zhuan)子(zi)(zi)固(gu)定在(zai)主(zhu)動(dong)軸(zhou)上，外(wai)(wai)轉(zhuan)子(zi)(zi)在(zai)油(you)泵殼(ke)體內(nei)(nei)(nei)(nei)可以(yi)自(zi)由(you)轉(zhuan)動(dong)，兩(liang)者之間有一定的偏心(xin)距。

當油(you)(you)(you)(you)(you)泵工(gong)(gong)作(zuo)時(shi)(shi)，內(nei)轉(zhuan)子帶(dai)動外(wai)轉(zhuan)子向(xiang)(xiang)同一(yi)個(ge)(ge)方向(xiang)(xiang)轉(zhuan)動。由于兩個(ge)(ge)轉(zhuan)子的偏心距和齒(chi)形輪(lun)(lun)廓確保了內(nei)外(wai)轉(zhuan)子無論轉(zhuan)到任何(he)角(jiao)度，各齒(chi)面(mian)之(zhi)間(jian)總(zong)是線(xian)接觸，這樣內(nei)外(wai)轉(zhuan)子輪(lun)(lun)齒(chi)間(jian)便(bian)(bian)形成了四個(ge)(ge)工(gong)(gong)作(zuo)腔(qiang)(qiang)。由于內(nei)轉(zhuan)子的轉(zhuan)速大于外(wai)轉(zhuan)子的轉(zhuan)速（傳(chuan)動比5：4），當某一(yi)工(gong)(gong)作(zuo)腔(qiang)(qiang)從(cong)進油(you)(you)(you)(you)(you)道轉(zhuan)過時(shi)(shi)，轉(zhuan)子脫開嚙合，容(rong)積逐漸增大，產生(sheng)真空度，潤(run)滑油(you)(you)(you)(you)(you)便(bian)(bian)從(cong)進油(you)(you)(you)(you)(you)道被吸入(ru)。轉(zhuan)子繼續(xu)旋轉(zhuan)，潤(run)滑油(you)(you)(you)(you)(you)被帶(dai)到出油(you)(you)(you)(you)(you)道另一(yi)側(ce)，這時(shi)(shi)轉(zhuan)子進入(ru)嚙合，油(you)(you)(you)(you)(you)腔(qiang)(qiang)容(rong)積逐漸減小，油(you)(you)(you)(you)(you)壓升高，使油(you)(you)(you)(you)(you)從(cong)齒(chi)間(jian)擠(ji)出，經出油(you)(you)(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(shi)機(ji)油(you)泵(beng)和轉子式(shi)機(ji)油(you)泵(beng)對比起來，各有各的特(te)點：

齒(chi)輪(lun)式機(ji)油泵(beng)由于結構簡單(dan)，制造(zao)較(jiao)容易，并(bing)且(qie)工(gong)作可靠，是(shi)應用最為廣泛的一種機(ji)油泵(beng)。轉子式機(ji)油泵(beng)結構緊湊，吸油真空(kong)度較(jiao)高，泵(beng)油量較(jiao)大，且(qie)供(gong)油均勻，當機(ji)油泵(beng)安裝在曲(qu)軸箱外且(qie)位(wei)置較(jiao)高時，用此種機(ji)油泵(beng)較(jiao)為合適。