氣門挺桿。氣門挺桿的作用如下:
1、為了保證氣門關閉嚴密,會在氣門桿端與氣門驅動件之間留有適當的間隙,稱為氣門間隙;
2、若氣門間隙調整不當就會使發動機運行不正常的,過大會影響氣門的開啟量,氣門升程減少引起進氣不足,排氣不徹底,過小會引起氣門關閉不嚴引起漏氣,造成動力下降;
3、所以為了避免氣門間隙調整不當引起的麻煩,一般高速發動機上都會使用可自行調整氣門間隙的液力挺桿。
汽(qi)(qi)車(che)的(de)(de)(de)發(fa)動(dong)(dong)(dong)(dong)機相(xiang)當于汽(qi)(qi)車(che)的(de)(de)(de)心(xin)臟。發(fa)動(dong)(dong)(dong)(dong)機故障(zhang)也(ye)是困擾(rao)車(che)友(you)的(de)(de)(de)問題,氣(qi)(qi)(qi)門(men)(men)(men)挺桿(gan)(gan)是發(fa)動(dong)(dong)(dong)(dong)機的(de)(de)(de)重要(yao)部件。接下(xia)來就讓典(dian)邦給大家介紹(shao)一(yi)(yi)下(xia)氣(qi)(qi)(qi)門(men)(men)(men)挺桿(gan)(gan)的(de)(de)(de)作(zuo)用(yong)吧(ba)!氣(qi)(qi)(qi)門(men)(men)(men)挺桿(gan)(gan)的(de)(de)(de)功(gong)能,氣(qi)(qi)(qi)門(men)(men)(men)挺桿(gan)(gan)簡介-功(gong)能也(ye)是用(yong)于推動(dong)(dong)(dong)(dong)氣(qi)(qi)(qi)門(men)(men)(men)打開的(de)(de)(de)裝置。因為早期發(fa)動(dong)(dong)(dong)(dong)機中使用(yong)的(de)(de)(de)這種裝置形狀像(xiang)一(yi)(yi)根細桿(gan)(gan),所(suo)以被稱為氣(qi)(qi)(qi)門(men)(men)(men)挺桿(gan)(gan)。它的(de)(de)(de)主要(yao)功(gong)能是將凸(tu)(tu)輪的(de)(de)(de)旋轉運動(dong)(dong)(dong)(dong)轉化為往復運動(dong)(dong)(dong)(dong)。但這種結構的(de)(de)(de)發(fa)動(dong)(dong)(dong)(dong)機凸(tu)(tu)輪軸(zhou)一(yi)(yi)般不(bu)布置在發(fa)動(dong)(dong)(dong)(dong)機頂部。隨(sui)著現(xian)代(dai)(dai)汽(qi)(qi)車(che)發(fa)動(dong)(dong)(dong)(dong)機技術(shu)的(de)(de)(de)發(fa)展(zhan),越來越多的(de)(de)(de)汽(qi)(qi)車(che)發(fa)動(dong)(dong)(dong)(dong)機采用(yong)頂置凸(tu)(tu)輪軸(zhou)結構,其中傳統的(de)(de)(de)長氣(qi)(qi)(qi)門(men)(men)(men)挺柱基本取消,取而代(dai)(dai)之的(de)(de)(de)是由凸(tu)(tu)輪軸(zhou)驅動(dong)(dong)(dong)(dong)的(de)(de)(de)更加緊湊的(de)(de)(de)液(ye)(ye)壓(ya)(ya)(ya)挺柱,或者凸(tu)(tu)輪軸(zhou)直接驅動(dong)(dong)(dong)(dong)氣(qi)(qi)(qi)門(men)(men)(men)搖(yao)臂來控(kong)制氣(qi)(qi)(qi)門(men)(men)(men)的(de)(de)(de)開閉。液(ye)(ye)壓(ya)(ya)(ya)杠(gang)桿(gan)(gan)主要(yao)由柱塞(sai)、單(dan)向(xiang)閥(fa)和單(dan)向(xiang)閥(fa)彈簧組成。液(ye)(ye)壓(ya)(ya)(ya)桿(gan)(gan)始(shi)終(zhong)與(yu)凸(tu)(tu)輪軸(zhou)接觸,并(bing)且無間隙運行。在挺桿(gan)(gan)內(nei)部,液(ye)(ye)壓(ya)(ya)(ya)用(yong)于調整間隙。液(ye)(ye)壓(ya)(ya)(ya)挺柱主要(yao)由柱塞(sai)、單(dan)向(xiang)閥(fa)和單(dan)向(xiang)閥(fa)彈簧組成。止回閥(fa)用(yong)于儲存或釋(shi)放油。通過改(gai)變(bian)挺柱腔內(nei)的(de)(de)(de)油壓(ya)(ya)(ya),可以改(gai)變(bian)液(ye)(ye)壓(ya)(ya)(ya)挺柱的(de)(de)(de)工作(zuo)長度(du),從而自動(dong)(dong)(dong)(dong)調整氣(qi)(qi)(qi)門(men)(men)(men)間隙。
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