凸輪軸(zhou)瓦凸輪軸(zhou)軸(zhou)瓦的作用是(shi)用于(yu)連(lian)桿或者曲軸(zhou)在高速運轉的時(shi)候起到摩擦(ca)保護作用,在發動(dong)機使用過程中,時(shi)有燒瓦抱軸(zhou)事故發生,多是(shi)由于(yu)軸(zhou)瓦裝配不當造(zao)成的。軸(zhou)瓦抱軸(zhou)燒損主(zhu)要是(shi)由于(yu)軸(zhou)頸(jing)與軸(zhou)瓦之間(jian)的潤(run)滑油膜(mo)破裂,導致軸(zhou)瓦與曲軸(zhou)產生摩擦(ca)。
軸(zhou)(zhou)瓦(wa)是軸(zhou)(zhou)承(cheng)(cheng)(cheng)的一(yi)種(zhong)(zhong)。軸(zhou)(zhou)承(cheng)(cheng)(cheng)分(fen)為(wei)滑(hua)動(dong)(dong)(dong)軸(zhou)(zhou)承(cheng)(cheng)(cheng)和(he)(he)(he)滾(gun)動(dong)(dong)(dong)軸(zhou)(zhou)承(cheng)(cheng)(cheng),滑(hua)動(dong)(dong)(dong)軸(zhou)(zhou)承(cheng)(cheng)(cheng)就(jiu)(jiu)是軸(zhou)(zhou)瓦(wa),滾(gun)動(dong)(dong)(dong)軸(zhou)(zhou)承(cheng)(cheng)(cheng)就(jiu)(jiu)是有滾(gun)珠的那(nei)種(zhong)(zhong)。軸(zhou)(zhou)瓦(wa)又分(fen)兩種(zhong)(zhong),一(yi)種(zhong)(zhong)是分(fen)為(wei)兩半(ban)的瓦(wa),就(jiu)(jiu)叫軸(zhou)(zhou)瓦(wa)。另一(yi)種(zhong)(zhong)是統(tong)一(yi)的,叫軸(zhou)(zhou)套(tao)。軸(zhou)(zhou)瓦(wa)用(yong)(yong)巴氏合(he)金制(zhi)成,具(ju)有含油(you)和(he)(he)(he)耐(nai)磨功能。轉(zhuan)速(su)(su)較低(di),載荷較大,多數(shu)用(yong)(yong)滑(hua)動(dong)(dong)(dong)軸(zhou)(zhou)承(cheng)(cheng)(cheng)即軸(zhou)(zhou)瓦(wa);轉(zhuan)速(su)(su)較高,載荷較小,多數(shu)用(yong)(yong)滾(gun)動(dong)(dong)(dong)軸(zhou)(zhou)承(cheng)(cheng)(cheng)。例如火車輪(lun)軸(zhou)(zhou)的運(yun)轉(zhuan)都是用(yong)(yong)軸(zhou)(zhou)瓦(wa)相(xiang)配(pei)。只要(yao)有轉(zhuan)動(dong)(dong)(dong)的地方就(jiu)(jiu)會有軸(zhou)(zhou)承(cheng)(cheng)(cheng),就(jiu)(jiu)會有軸(zhou)(zhou)承(cheng)(cheng)(cheng)的潤滑(hua)。發動(dong)(dong)(dong)機上(shang)最重要(yao)的軸(zhou)(zhou)瓦(wa)是在(zai)曲軸(zhou)(zhou)上(shang)。曲軸(zhou)(zhou)上(shang),有支(zhi)撐曲軸(zhou)(zhou)運(yun)轉(zhuan)的曲軸(zhou)(zhou)軸(zhou)(zhou)頸,和(he)(he)(he)連(lian)接連(lian)桿的連(lian)桿軸(zhou)(zhou)徑。這些軸(zhou)(zhou)頸上(shang)都配(pei)有軸(zhou)(zhou)瓦(wa)。運(yun)轉(zhuan)的軸(zhou)(zhou),和(he)(he)(he)固定的瓦(wa),相(xiang)互(hu)摩擦,必須供給足(zu)夠的潤滑(hua)油(you)。令軸(zhou)(zhou)與(yu)瓦(wa)分(fen)開,摩擦的只是兩者之(zhi)(zhi)間的油(you)膜。在(zai)連(lian)桿小頭與(yu)活(huo)塞銷(xiao)之(zhi)(zhi)間,在(zai)配(pei)氣凸(tu)輪(lun)軸(zhou)(zhou)上(shang),在(zai)搖(yao)臂軸(zhou)(zhou)上(shang)..都有軸(zhou)(zhou)瓦(wa)。
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