一、機油泵常用的形式有哪兩種
汽車(che)機油泵按照結構形式不同,分為兩大(da)類(lei)型,分別是(shi):
1、嚙合齒輪式機油泵
齒(chi)(chi)輪(lun)式機油泵由主(zhu)(zhu)動(dong)軸、主(zhu)(zhu)動(dong)齒(chi)(chi)輪(lun)、從(cong)(cong)動(dong)軸、從(cong)(cong)動(dong)齒(chi)(chi)輪(lun)、殼體等組(zu)成。兩(liang)個齒(chi)(chi)數相(xiang)同的齒(chi)(chi)輪(lun)相(xiang)互(hu)嚙合,裝在(zai)殼體內,齒(chi)(chi)輪(lun)與殼體的徑向和(he)端(duan)面間隙很小。主(zhu)(zhu)動(dong)軸與主(zhu)(zhu)動(dong)齒(chi)(chi)輪(lun)鍵連接(jie),從(cong)(cong)動(dong)齒(chi)(chi)輪(lun)空套在(zai)從(cong)(cong)動(dong)軸上。
工作(zuo)時,主動(dong)齒(chi)輪(lun)帶(dai)(dai)動(dong)從(cong)動(dong)齒(chi)輪(lun)反向旋(xuan)轉。兩齒(chi)輪(lun)旋(xuan)轉時,充滿在齒(chi)輪(lun)齒(chi)槽間(jian)的機(ji)油(you)(you)(you)沿油(you)(you)(you)泵殼(ke)壁由(you)進油(you)(you)(you)腔(qiang)帶(dai)(dai)到出(chu)油(you)(you)(you)腔(qiang),在進油(you)(you)(you)腔(qiang)一(yi)側(ce)由(you)于(yu)齒(chi)輪(lun)脫(tuo)開嚙合以(yi)及機(ji)油(you)(you)(you)被(bei)不斷帶(dai)(dai)出(chu)而產(chan)生真空,使油(you)(you)(you)底殼(ke)內(nei)的機(ji)油(you)(you)(you)在大氣壓力作(zuo)用(yong)下經集濾器進入(ru)進油(you)(you)(you)腔(qiang),而在出(chu)油(you)(you)(you)腔(qiang)一(yi)側(ce)由(you)于(yu)齒(chi)輪(lun)進入(ru)嚙合和(he)機(ji)油(you)(you)(you)被(bei)不斷帶(dai)(dai)入(ru)而產(chan)生擠壓作(zuo)用(yong),機(ji)油(you)(you)(you)以(yi)一(yi)定壓力被(bei)泵出(chu)。
一(yi)般嚙(nie)合(he)齒(chi)(chi)輪式機油泵又分(fen)為(wei)內嚙(nie)合(he)齒(chi)(chi)輪式機油泵與外(wai)嚙(nie)合(he)齒(chi)(chi)輪式機油泵兩種類(lei)型。
2、轉子式機油泵
轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)式機油(you)(you)(you)(you)泵(beng)是利用內(nei)外轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)壓送潤滑油(you)(you)(you)(you),又叫次(ci)擺線齒輪(lun)泵(beng)。轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)式機油(you)(you)(you)(you)泵(beng)主要由內(nei)、外轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi),機油(you)(you)(you)(you)泵(beng)體及機油(you)(you)(you)(you)泵(beng)蓋等(deng)零件組成。主動(dong)的(de)內(nei)轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)和從動(dong)的(de)外轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)都裝在機油(you)(you)(you)(you)泵(beng)殼體內(nei)。內(nei)轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)有(you)四個(ge)凸齒,外轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)有(you)五個(ge)凹齒。內(nei)轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)固定(ding)在主動(dong)軸上(shang),外轉(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)在油(you)(you)(you)(you)泵(beng)殼體內(nei)可以自由轉(zhuan)(zhuan)(zhuan)(zhuan)動(dong),兩者之間有(you)一定(ding)的(de)偏心距。
當油(you)泵(beng)工作(zuo)時(shi),內轉(zhuan)子(zi)(zi)(zi)帶(dai)動(dong)外轉(zhuan)子(zi)(zi)(zi)向(xiang)同(tong)一個方向(xiang)轉(zhuan)動(dong)。由于兩個轉(zhuan)子(zi)(zi)(zi)的偏心(xin)距和齒形輪(lun)廓確(que)保(bao)了(le)內外轉(zhuan)子(zi)(zi)(zi)無論轉(zhuan)到任何角度,各齒面之間總是(shi)線接觸,這(zhe)樣內外轉(zhuan)子(zi)(zi)(zi)輪(lun)齒間便形成了(le)四個工作(zuo)腔。由于內轉(zhuan)子(zi)(zi)(zi)的轉(zhuan)速(su)大于外轉(zhuan)子(zi)(zi)(zi)的轉(zhuan)速(su)(傳動(dong)比5:4),當某(mou)一工作(zuo)腔從進油(you)道轉(zhuan)過(guo)時(shi),轉(zhuan)子(zi)(zi)(zi)脫開嚙合,容(rong)積逐(zhu)漸增大,產生(sheng)真空度,潤(run)滑油(you)便從進油(you)道被(bei)吸入(ru)。轉(zhuan)子(zi)(zi)(zi)繼(ji)續旋(xuan)轉(zhuan),潤(run)滑油(you)被(bei)帶(dai)到出油(you)道另(ling)一側,這(zhe)時(shi)轉(zhuan)子(zi)(zi)(zi)進入(ru)嚙合,油(you)腔容(rong)積逐(zhu)漸減小(xiao),油(you)壓(ya)升高,使油(you)從齒間擠出,經出油(you)道送出。
二、齒輪式機油泵和轉子式機油泵哪個好
齒(chi)輪式(shi)機(ji)油泵和轉子式(shi)機(ji)油泵對比(bi)起來,各有各的特點(dian):
齒輪(lun)式機(ji)油(you)(you)泵(beng)由于結構簡單,制造(zao)較(jiao)容易,并且工(gong)作(zuo)可(ke)靠,是(shi)應用(yong)最(zui)為(wei)廣泛的一種(zhong)機(ji)油(you)(you)泵(beng)。轉(zhuan)子(zi)式機(ji)油(you)(you)泵(beng)結構緊湊,吸油(you)(you)真空度較(jiao)高,泵(beng)油(you)(you)量較(jiao)大,且供油(you)(you)均勻(yun),當機(ji)油(you)(you)泵(beng)安裝在曲軸箱外且位(wei)置較(jiao)高時,用(yong)此種(zhong)機(ji)油(you)(you)泵(beng)較(jiao)為(wei)合適。