氣(qi)(qi)(qi)(qi)門(men)(men)(men)(men)座(zuo)(zuo)(zuo)(zuo)圈閥座(zuo)(zuo)(zuo)(zuo)環功(gong)能氣(qi)(qi)(qi)(qi)門(men)(men)(men)(men)座(zuo)(zuo)(zuo)(zuo)圈的(de)(de)(de)(de)(de)主要(yao)(yao)作用(yong)(yong)(yong)是承(cheng)(cheng)受(shou)高速沖(chong)(chong)擊(ji),密封(feng)氣(qi)(qi)(qi)(qi)門(men)(men)(men)(men)。發動(dong)(dong)機(ji)(ji)(ji)氣(qi)(qi)(qi)(qi)門(men)(men)(men)(men)座(zuo)(zuo)(zuo)(zuo)圈用(yong)(yong)(yong)于延長發動(dong)(dong)機(ji)(ji)(ji)的(de)(de)(de)(de)(de)使用(yong)(yong)(yong)壽命(ming)(ming),便于維(wei)護和更換(huan)。氣(qi)(qi)(qi)(qi)門(men)(men)(men)(men)座(zuo)(zuo)(zuo)(zuo)圈的(de)(de)(de)(de)(de)缺(que)點是導熱(re)性差,選擇合適的(de)(de)(de)(de)(de)與缸膛過盈量,否(fou)則工作時(shi)座(zuo)(zuo)(zuo)(zuo)圈會(hui)脫(tuo)落,造(zao)成(cheng)發動(dong)(dong)機(ji)(ji)(ji)維(wei)修事(shi)故(gu)!氣(qi)(qi)(qi)(qi)門(men)(men)(men)(men)座(zuo)(zuo)(zuo)(zuo)圈一般由(you)耐熱(re)合金(jin)鋼(gang)制成(cheng)。汽(qi)車(che)氣(qi)(qi)(qi)(qi)門(men)(men)(men)(men)座(zuo)(zuo)(zuo)(zuo)圈是汽(qi)車(che)發動(dong)(dong)機(ji)(ji)(ji)的(de)(de)(de)(de)(de)重要(yao)(yao)附件,主要(yao)(yao)用(yong)(yong)(yong)來密封(feng)發動(dong)(dong)機(ji)(ji)(ji)氣(qi)(qi)(qi)(qi)門(men)(men)(men)(men),基本上(shang)是一個時(shi)刻(ke)承(cheng)(cheng)受(shou)高速沖(chong)(chong)擊(ji)的(de)(de)(de)(de)(de)部(bu)件。因(yin)此,汽(qi)車(che)氣(qi)(qi)(qi)(qi)門(men)(men)(men)(men)座(zuo)(zuo)(zuo)(zuo)圈在使用(yong)(yong)(yong)一段時(shi)間后,容易出現不(bu)(bu)同程度的(de)(de)(de)(de)(de)磨損失效,經常面臨維(wei)修。修理氣(qi)(qi)(qi)(qi)門(men)(men)(men)(men)座(zuo)(zuo)(zuo)(zuo)時(shi),應根據氣(qi)(qi)(qi)(qi)門(men)(men)(men)(men)座(zuo)(zuo)(zuo)(zuo)的(de)(de)(de)(de)(de)不(bu)(bu)同磨損情況選擇不(bu)(bu)同的(de)(de)(de)(de)(de)修理方法,以(yi)降(jiang)低發動(dong)(dong)機(ji)(ji)(ji)的(de)(de)(de)(de)(de)維(wei)修成(cheng)本。一般來說,氣(qi)(qi)(qi)(qi)門(men)(men)(men)(men)座(zuo)(zuo)(zuo)(zuo)圈的(de)(de)(de)(de)(de)作用(yong)(yong)(yong)是提高發動(dong)(dong)機(ji)(ji)(ji)的(de)(de)(de)(de)(de)使用(yong)(yong)(yong)壽命(ming)(ming),承(cheng)(cheng)受(shou)高速沖(chong)(chong)擊(ji),方便發動(dong)(dong)機(ji)(ji)(ji)維(wei)修和更換(huan),密封(feng)發動(dong)(dong)機(ji)(ji)(ji)氣(qi)(qi)(qi)(qi)門(men)(men)(men)(men)。
修理發動機時,不可避免地要裝配氣門座圈。
如何取出氣門座圈?
可將汽缸蓋放入盆內,注入廢機油,加熱至沸點,迅速從盆中取出缸蓋,輕輕地震動,座圈就會自動脫出,座圈承孔也不會變形。
1組裝方(fang)法。
切割(ge)方法:氣門座(zuo)(zuo)圈(quan)(quan)(quan)主要在機床(chuang)上用刀具切割(ge)。用這種方法拆下閥座(zuo)(zuo)圈(quan)(quan)(quan)時(shi),為了保(bao)證閥座(zuo)(zuo)圈(quan)(quan)(quan)與閥座(zuo)(zuo)圈(quan)(quan)(quan)底(di)孔的良好過盈配(pei)合(he),一般需(xu)要用刀具加大(da)閥座(zuo)(zuo)圈(quan)(quan)(quan)底(di)孔的尺寸,同時(shi)外徑相(xiang)應較大(da)的閥座(zuo)(zuo)圈(quan)(quan)(quan)也要配(pei)合(he)使用。
2.拉(la)延(yan)(yan)法(fa):拉(la)延(yan)(yan)法(fa)主(zhu)要是用一定的(de)拉(la)延(yan)(yan)工具,直(zhi)接從氣(qi)缸蓋上拉(la)延(yan)(yan)出氣(qi)門(men)座(zuo)(zuo)圈(quan)(quan)。首先(xian)在閥(fa)(fa)座(zuo)(zuo)環內表(biao)面攻螺(luo)紋,然后(hou)將相(xiang)應尺(chi)寸的(de)螺(luo)桿擰入閥(fa)(fa)座(zuo)(zuo)環。在閥(fa)(fa)座(zuo)(zuo)環和螺(luo)桿垂直(zhi)的(de)情況下,用錘子輕(qing)輕(qing)敲擊(ji)螺(luo)桿,直(zhi)到閥(fa)(fa)座(zuo)(zuo)環被(bei)拔出。拉(la)延(yan)(yan)方法(fa)基本上會改變閥(fa)(fa)座(zuo)(zuo)圈(quan)(quan)底(di)孔的(de)尺(chi)寸,尺(chi)寸的(de)變化取決(jue)于(yu)拉(la)延(yan)(yan)工具的(de)拉(la)延(yan)(yan)方法(fa)和受力方法(fa)。
3.電(dian)(dian)焊(han)(han)(han)(han)加(jia)熱(re)法(fa):電(dian)(dian)焊(han)(han)(han)(han)加(jia)熱(re)法(fa)的常(chang)用(yong)方法(fa)是用(yong)帶蓋焊(han)(han)(han)(han)條沿閥座(zuo)(zuo)環內表面連續均勻點焊(han)(han)(han)(han)。當閥座(zuo)(zuo)圈受(shou)熱(re)變(bian)(bian)紅時,立(li)即往(wang)閥座(zuo)(zuo)圈上(shang)倒冷水,此時閥座(zuo)(zuo)圈通常(chang)會斷裂。這(zhe)種(zhong)方法(fa)不應用(yong)于加(jia)熱(re)閥座(zuo)(zuo)太長時間。通常(chang),閥座(zuo)(zuo)被加(jia)熱(re)到(dao)變(bian)(bian)紅。
4.感(gan)應加(jia)(jia)熱(re)法(fa):感(gan)應加(jia)(jia)熱(re)法(fa)是利用(yong)電(dian)磁感(gan)應原(yuan)理,將工(gong)業頻率的(de)電(dian)源(yuan)轉換(huan)為(wei)特定頻段(duan)的(de)電(dian)源(yuan),對金屬材料進行加(jia)(jia)熱(re)的(de)方法(fa)。感(gan)應加(jia)(jia)熱(re)系統主(zhu)要由感(gan)應線圈、交流電(dian)源(yuan)和工(gong)件組成。感(gan)應線圈中的(de)交流電(dian)使閥座(zuo)環(huan)產生渦流,從而(er)加(jia)(jia)熱(re)閥座(zuo)環(huan)。
組裝閥座圈時,一定要注意閥門與閥座之間的間隙,如果閥門與閥座之間的密封不嚴密,就會發生閥門泄漏。承(cheng)襲梅賽德斯-奔馳(chi)對安全(quan)(quan)(quan)的極致追求,6個(ge)安全(quan)(quan)(quan)氣囊全(quan)(quan)(quan)面保障駕駛(shi)員的安全(quan)(quan)(quan),配(pei)備注意力輔(fu)助(zhu)系(xi)(xi)(xi)(xi)統(tong)、主(zhu)動(dong)駐車輔(fu)助(zhu)系(xi)(xi)(xi)(xi)統(tong)、碰(peng)撞預(yu)防輔(fu)助(zhu)系(xi)(xi)(xi)(xi)統(tong)增強版等,為(wei)(wei)駕駛(shi)者提供(gong)支持以減輕他們的駕駛(shi)強度。值得一提的是,國產GLA 還搭載了盲點輔(fu)助(zhu)系(xi)(xi)(xi)(xi)統(tong)、主(zhu)動(dong)駐車輔(fu)助(zhu)系(xi)(xi)(xi)(xi)統(tong),為(wei)(wei)駕乘帶來更(geng)多便利。
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