減(jian)(jian)震(zhen)(zhen)(zhen)器(Absorber) ,減(jian)(jian)震(zhen)(zhen)(zhen)器主(zhu)要(yao)用來(lai)(lai)抑(yi)制彈(dan)(dan)(dan)簧(huang)(huang)吸震(zhen)(zhen)(zhen)后(hou)反彈(dan)(dan)(dan)時(shi)(shi)的震(zhen)(zhen)(zhen)蕩及來(lai)(lai)自路面(mian)(mian)的沖擊(ji)。在(zai)經過(guo)不平路面(mian)(mian)時(shi)(shi),雖然(ran)吸震(zhen)(zhen)(zhen)彈(dan)(dan)(dan)簧(huang)(huang)可以(yi)過(guo)濾(lv)路面(mian)(mian)的震(zhen)(zhen)(zhen)動(dong)(dong),但(dan)彈(dan)(dan)(dan)簧(huang)(huang)自身(shen)還會有(you)往復運動(dong)(dong),而減(jian)(jian)震(zhen)(zhen)(zhen)器就是(shi)用來(lai)(lai)抑(yi)制這種(zhong)彈(dan)(dan)(dan)簧(huang)(huang)跳(tiao)躍的。減(jian)(jian)震(zhen)(zhen)(zhen)器太(tai)(tai)軟,車(che)身(shen)就會上下跳(tiao)躍,減(jian)(jian)震(zhen)(zhen)(zhen)器太(tai)(tai)硬就會帶(dai)來(lai)(lai)太(tai)(tai)大(da)的阻(zu)力,妨礙彈(dan)(dan)(dan)簧(huang)(huang)正常工作。在(zai)關(guan)于懸(xuan)掛系統的改裝(zhuang)過(guo)程中,硬的減(jian)(jian)震(zhen)(zhen)(zhen)器要(yao)與(yu)硬的彈(dan)(dan)(dan)簧(huang)(huang)相(xiang)搭配,而彈(dan)(dan)(dan)簧(huang)(huang)的硬度又與(yu)車(che)重(zhong)息息相(xiang)關(guan),因此較(jiao)重(zhong)的車(che)一般采用較(jiao)硬的減(jian)(jian)震(zhen)(zhen)(zhen)器。與(yu)引震(zhen)(zhen)(zhen)曲(qu)(qu)軸相(xiang)接的裝(zhuang)置,用來(lai)(lai)抗衡曲(qu)(qu)軸的扭轉震(zhen)(zhen)(zhen)動(dong)(dong)(即(ji)曲(qu)(qu)軸受汽缸(gang)點火的沖擊(ji)力而扭動(dong)(dong)的現象)。
懸架系統中(zhong)由(you)于彈(dan)性(xing)元件受沖擊產(chan)生震(zhen)(zhen)(zhen)動(dong)(dong),為(wei)改善汽(qi)車(che)行(xing)駛平順性(xing),懸架中(zhong)與(yu)彈(dan)性(xing)元件并聯安裝(zhuang)減(jian)(jian)震(zhen)(zhen)(zhen)器(qi)(qi),為(wei)衰減(jian)(jian)震(zhen)(zhen)(zhen)動(dong)(dong),汽(qi)車(che)懸架系統中(zhong)采(cai)用減(jian)(jian)震(zhen)(zhen)(zhen)器(qi)(qi)多(duo)是液(ye)力減(jian)(jian)震(zhen)(zhen)(zhen)器(qi)(qi),其工作原(yuan)理是當(dang)車(che)架(或車(che)身)和(he)車(che)橋(qiao)間(jian)震(zhen)(zhen)(zhen)動(dong)(dong)而出(chu)現相(xiang)對(dui)運(yun)動(dong)(dong)時(shi),減(jian)(jian)震(zhen)(zhen)(zhen)器(qi)(qi)內的活塞(sai)上(shang)下移動(dong)(dong),減(jian)(jian)震(zhen)(zhen)(zhen)器(qi)(qi)腔內的油(you)液(ye)便(bian)反復地從一個(ge)腔經過不(bu)(bu)同的孔(kong)隙流入(ru)另一個(ge)腔內。此時(shi)孔(kong)壁與(yu)油(you)液(ye)間(jian)的摩(mo)擦和(he)油(you)液(ye)分子間(jian)的內摩(mo)擦對(dui)震(zhen)(zhen)(zhen)動(dong)(dong)形成阻(zu)尼力,使汽(qi)車(che)震(zhen)(zhen)(zhen)動(dong)(dong)能量轉化為(wei)油(you)液(ye)熱(re)能,再由(you)減(jian)(jian)震(zhen)(zhen)(zhen)器(qi)(qi)吸收散(san)發(fa)到(dao)大氣中(zhong)。在油(you)液(ye)通道截面和(he)等(deng)因素(su)不(bu)(bu)變(bian)時(shi),阻(zu)尼力隨(sui)車(che)架與(yu)車(che)橋(qiao)(或車(che)輪)之間(jian)的相(xiang)對(dui)運(yun)動(dong)(dong)速度增減(jian)(jian),并與(yu)油(you)液(ye)粘度有關(guan)[1] 。
減(jian)(jian)(jian)震器與(yu)彈(dan)(dan)性(xing)元(yuan)件承擔著緩沖(chong)擊和減(jian)(jian)(jian)震的任(ren)務,阻尼力過大,將使懸架彈(dan)(dan)性(xing)變壞,甚至使減(jian)(jian)(jian)震器連接件損(sun)壞。因而要調節彈(dan)(dan)性(xing)元(yuan)件和減(jian)(jian)(jian)震器這一矛(mao)盾(dun)。
(1) 在壓縮行(xing)程(車橋和車架相互靠近(jin)),減震器阻尼(ni)力較小(xiao),以便充分發揮彈性元件(jian)的彈性作(zuo)用,緩和沖擊。這時,彈性元件(jian)起主要作(zuo)用。
(2) 在懸架伸張行程中(zhong)(車橋和車架相互遠離),減震器阻尼力應大,迅速減震。
(3) 當車橋(或車輪)與車橋間的相對速度過大時,要求減震(zhen)器(qi)能自動(dong)加大液流量,使阻(zu)尼力始(shi)終保(bao)持在(zai)一(yi)定限(xian)度之內,以避免承受(shou)過大的沖擊載荷。
在(zai)汽車(che)懸(xuan)架系統中(zhong)廣泛采用(yong)(yong)(yong)的是筒式減震(zhen)器(qi),且在(zai)壓(ya)縮(suo)和伸張(zhang)行程(cheng)中(zhong)均能起減震(zhen)作用(yong)(yong)(yong)叫(jiao)雙向作用(yong)(yong)(yong)式減震(zhen)器(qi),還有采用(yong)(yong)(yong)新式減震(zhen)器(qi),它包括充氣式減震(zhen)器(qi)和阻力可調(diao)式減震(zhen)器(qi)。
汽車減振器的安裝方法如(ru)下:
1、將(jiang)車輛(liang)(liang)駛入工(gong)位,正確(que)停放。將(jiang)舉(ju)升機支(zhi)撐座伸入車輛(liang)(liang)底(di)部,確(que)保支(zhi)撐座和(he)車輛(liang)(liang)車身支(zhi)撐點良好(hao)接(jie)觸。取下接(jie)雨(yu)板、雨(yu)刷(shua)器,拆卸輪(lun)胎,拆卸下來(lai)的輪(lun)胎平(ping)穩(wen)的放在地上(shang),外(wai)側朝上(shang),將(jiang)輪(lun)胎螺(luo)絲(si)放在工(gong)具車上(shang);
2、逐步拆(chai)卸(xie)連接桿(gan)的(de)螺(luo)(luo)絲,剎車油(you)(you)管(guan)螺(luo)(luo)絲,剎車ABS線(xian)。螺(luo)(luo)絲拆(chai)卸(xie)后整理(li)好放在(zai)工具車上(shang)(注意:小心拆(chai)卸(xie)油(you)(you)管(guan)和ABS線(xian)不(bu)要(yao)(yao)損(sun)壞(huai))半軸(zhou)螺(luo)(luo)帽取(qu)下(xia)(xia)(xia),拆(chai)下(xia)(xia)(xia)自動(dong)系統。(注意:合(he)理(li)固定卡鉗,不(bu)要(yao)(yao)損(sun)壞(huai)油(you)(you)管(guan)。)拆(chai)下(xia)(xia)(xia)方(fang)向(xiang)拉(la)桿(gan)(注意:用專用工具取(qu)下(xia)(xia)(xia)球頭(tou)(tou))拆(chai)下(xia)(xia)(xia)車身高度(du)傳感(gan)器(注意:小心拆(chai)下(xia)(xia)(xia),不(bu)要(yao)(yao)損(sun)壞(huai))拆(chai)下(xia)(xia)(xia)下(xia)(xia)(xia)控制臂球頭(tou)(tou)取(qu)下(xia)(xia)(xia)上(shang)座連接螺(luo)(luo)栓(shuan),將(jiang)減震器總(zong)成(cheng)及轉向(xiang)節總(zong)成(cheng)一并拿出(chu)。(注意:需(xu)兩人配合(he)操作,避免更(geng)換相關部件損(sun)壞(huai));
3、原(yuan)(yuan)車(che)減(jian)(jian)震器總成(cheng)已拆卸完成(cheng),開始更(geng)換新(xin)的減(jian)(jian)震器總成(cheng)。取(qu)出(chu)新(xin)的減(jian)(jian)震器總成(cheng),對比新(xin)舊(jiu)無誤后方能安(an)裝(zhuang)。將(jiang)新(xin)的減(jian)(jian)震器總成(cheng)安(an)裝(zhuang)在轉向節總成(cheng)上,將(jiang)減(jian)(jian)震器總成(cheng)及轉向節總成(cheng)一(yi)同裝(zhuang)配(pei)回車(che)輛(liang)。把ABS線(xian)、油(you)管、拉桿球頭恢(hui)復原(yuan)(yuan)位。將(jiang)自動(dong)系(xi)統(tong)全部復原(yuan)(yuan),仔(zi)細檢(jian)查油(you)管及其他線(xian)路有無干(gan)涉(she)。將(jiang)車(che)胎(tai)裝(zhuang)配(pei)回車(che)(注意:仔(zi)細擰(ning)緊輪胎(tai)螺栓)依次將(jiang)接雨板、雨刷(shua)(shua)器裝(zhuang)配(pei)回原(yuan)(yuan)車(che)。(注意:安(an)裝(zhuang)完成(cheng)之后,要記得調試(shi)雨刷(shua)(shua)器)安(an)裝(zhuang)完畢,進行路試(shi)
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