轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)機(ji)總成即轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi),又名轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)機(ji)、方(fang)向(xiang)(xiang)機(ji),它是(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)系中(zhong)最重要的(de)(de)部(bu)件。它的(de)(de)作用(yong)是(shi)(shi):增大轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)盤(pan)(pan)傳到轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)傳動(dong)機(ji)構的(de)(de)力(li)(li)和(he)改變力(li)(li)的(de)(de)傳遞方(fang)向(xiang)(xiang)。轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)的(de)(de)操(cao)縱(zong)是(shi)(shi)全液(ye)(ye)壓(ya)式(shi)(shi)(shi)(shi),也就是(shi)(shi)說在(zai)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)柱和(he)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)輪之間(jian)沒有(you)(you)機(ji)械連接,在(zai)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)與轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)油(you)缸之間(jian)是(shi)(shi)液(ye)(ye)壓(ya)管或軟管鏈接。當(dang)轉(zhuan)(zhuan)(zhuan)(zhuan)動(dong)方(fang)向(xiang)(xiang)盤(pan)(pan),轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)根(gen)據方(fang)向(xiang)(xiang)盤(pan)(pan)轉(zhuan)(zhuan)(zhuan)(zhuan)動(dong)比例輸送(song)相對的(de)(de)油(you)量(liang)(liang),該油(you)量(liang)(liang)直接流到操(cao)縱(zong)缸相應一側,同時另一側的(de)(de)油(you)量(liang)(liang)回到油(you)箱(xiang)。轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)按結(jie)構形式(shi)(shi)(shi)(shi)可分為:有(you)(you)齒(chi)(chi)輪齒(chi)(chi)條式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)、蝸桿曲柄指銷式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)、循(xun)環(huan)(huan)球-齒(chi)(chi)條齒(chi)(chi)扇式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)、循(xun)環(huan)(huan)球曲柄指銷式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)、蝸桿滾輪式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)等(deng)。按照助(zhu)力(li)(li)形式(shi)(shi)(shi)(shi)又可以分:為機(ji)械式(shi)(shi)(shi)(shi)(無助(zhu)力(li)(li))轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi),和(he)動(dong)力(li)(li)式(shi)(shi)(shi)(shi)(有(you)(you)助(zhu)力(li)(li))轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)兩種,其中(zhong)動(dong)力(li)(li)轉(zhuan)(zhuan)(zhuan)(zhuan)向(xiang)(xiang)器(qi)又可以分為氣壓(ya)動(dong)力(li)(li)式(shi)(shi)(shi)(shi)、液(ye)(ye)壓(ya)動(dong)力(li)(li)式(shi)(shi)(shi)(shi)、電(dian)(dian)動(dong)助(zhu)力(li)(li)式(shi)(shi)(shi)(shi)、電(dian)(dian)液(ye)(ye)助(zhu)力(li)(li)式(shi)(shi)(shi)(shi)等(deng)種類。
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