轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)機總成即轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi),又名轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)機、方向(xiang)(xiang)機,它(ta)是(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)系中(zhong)最重要的(de)(de)部(bu)件(jian)。它(ta)的(de)(de)作用是(shi):增(zeng)大(da)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)盤(pan)傳(chuan)到(dao)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)傳(chuan)動(dong)(dong)(dong)機構的(de)(de)力(li)(li)和改變力(li)(li)的(de)(de)傳(chuan)遞方向(xiang)(xiang)。轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)的(de)(de)操縱是(shi)全液壓(ya)式(shi)(shi)(shi)(shi),也就是(shi)說(shuo)在轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)柱和轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)輪(lun)之(zhi)間(jian)沒有機械連(lian)接,在轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)與轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)油(you)缸(gang)之(zhi)間(jian)是(shi)液壓(ya)管或軟管鏈(lian)接。當轉(zhuan)(zhuan)(zhuan)(zhuan)動(dong)(dong)(dong)方向(xiang)(xiang)盤(pan),轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)根據方向(xiang)(xiang)盤(pan)轉(zhuan)(zhuan)(zhuan)(zhuan)動(dong)(dong)(dong)比(bi)例輸送相對(dui)的(de)(de)油(you)量(liang),該(gai)油(you)量(liang)直接流到(dao)操縱缸(gang)相應一(yi)側,同時另一(yi)側的(de)(de)油(you)量(liang)回到(dao)油(you)箱。轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)按結構形式(shi)(shi)(shi)(shi)可分(fen)為:有齒(chi)輪(lun)齒(chi)條(tiao)式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)、蝸(gua)(gua)桿曲柄(bing)指銷式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)、循(xun)環球(qiu)-齒(chi)條(tiao)齒(chi)扇式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)、循(xun)環球(qiu)曲柄(bing)指銷式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)、蝸(gua)(gua)桿滾輪(lun)式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)等。按照助力(li)(li)形式(shi)(shi)(shi)(shi)又可以分(fen):為機械式(shi)(shi)(shi)(shi)(無(wu)助力(li)(li))轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi),和動(dong)(dong)(dong)力(li)(li)式(shi)(shi)(shi)(shi)(有助力(li)(li))轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)兩種,其中(zhong)動(dong)(dong)(dong)力(li)(li)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)又可以分(fen)為氣壓(ya)動(dong)(dong)(dong)力(li)(li)式(shi)(shi)(shi)(shi)、液壓(ya)動(dong)(dong)(dong)力(li)(li)式(shi)(shi)(shi)(shi)、電(dian)動(dong)(dong)(dong)助力(li)(li)式(shi)(shi)(shi)(shi)、電(dian)液助力(li)(li)式(shi)(shi)(shi)(shi)等種類。
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