轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)機(ji)(ji)總成(cheng)即轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi),又名轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)機(ji)(ji)、方(fang)向(xiang)(xiang)(xiang)(xiang)機(ji)(ji),它是轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)系(xi)中(zhong)最重要的(de)部件。它的(de)作用是:增大轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)盤傳到(dao)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)傳動(dong)(dong)機(ji)(ji)構的(de)力(li)(li)(li)(li)和改變(bian)力(li)(li)(li)(li)的(de)傳遞方(fang)向(xiang)(xiang)(xiang)(xiang)。轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)的(de)操縱是全液壓(ya)式(shi)(shi)(shi)(shi),也就(jiu)是說在(zai)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)柱(zhu)和轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)輪(lun)之間沒有機(ji)(ji)械連接,在(zai)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)與轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)油(you)缸之間是液壓(ya)管(guan)或軟管(guan)鏈(lian)接。當轉(zhuan)(zhuan)(zhuan)動(dong)(dong)方(fang)向(xiang)(xiang)(xiang)(xiang)盤,轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)根據(ju)方(fang)向(xiang)(xiang)(xiang)(xiang)盤轉(zhuan)(zhuan)(zhuan)動(dong)(dong)比例輸送相(xiang)對的(de)油(you)量(liang),該油(you)量(liang)直接流到(dao)操縱缸相(xiang)應一側(ce),同時另(ling)一側(ce)的(de)油(you)量(liang)回到(dao)油(you)箱。轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)按結構形式(shi)(shi)(shi)(shi)可分(fen)為(wei):有齒輪(lun)齒條(tiao)(tiao)式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)、蝸桿(gan)曲柄指銷(xiao)式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)、循環球(qiu)-齒條(tiao)(tiao)齒扇式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)、循環球(qiu)曲柄指銷(xiao)式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)、蝸桿(gan)滾輪(lun)式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)等。按照助力(li)(li)(li)(li)形式(shi)(shi)(shi)(shi)又可以(yi)分(fen):為(wei)機(ji)(ji)械式(shi)(shi)(shi)(shi)(無助力(li)(li)(li)(li))轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi),和動(dong)(dong)力(li)(li)(li)(li)式(shi)(shi)(shi)(shi)(有助力(li)(li)(li)(li))轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)兩種(zhong),其中(zhong)動(dong)(dong)力(li)(li)(li)(li)轉(zhuan)(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)又可以(yi)分(fen)為(wei)氣壓(ya)動(dong)(dong)力(li)(li)(li)(li)式(shi)(shi)(shi)(shi)、液壓(ya)動(dong)(dong)力(li)(li)(li)(li)式(shi)(shi)(shi)(shi)、電(dian)動(dong)(dong)助力(li)(li)(li)(li)式(shi)(shi)(shi)(shi)、電(dian)液助力(li)(li)(li)(li)式(shi)(shi)(shi)(shi)等種(zhong)類。
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