轉(zhuan)向(xiang)(xiang)(xiang)(xiang)機(ji)(ji)總(zong)成即轉(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)(qi),又(you)(you)名轉(zhuan)向(xiang)(xiang)(xiang)(xiang)機(ji)(ji)、方向(xiang)(xiang)(xiang)(xiang)機(ji)(ji),它(ta)(ta)是轉(zhuan)向(xiang)(xiang)(xiang)(xiang)系中最(zui)重要的(de)(de)部件(jian)。它(ta)(ta)的(de)(de)作用是:增大轉(zhuan)向(xiang)(xiang)(xiang)(xiang)盤傳(chuan)到轉(zhuan)向(xiang)(xiang)(xiang)(xiang)傳(chuan)動(dong)機(ji)(ji)構(gou)的(de)(de)力(li)(li)(li)和(he)改變力(li)(li)(li)的(de)(de)傳(chuan)遞方向(xiang)(xiang)(xiang)(xiang)。轉(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)(qi)的(de)(de)操(cao)縱是全液壓(ya)(ya)(ya)式(shi)(shi)(shi)(shi),也(ye)就是說在轉(zhuan)向(xiang)(xiang)(xiang)(xiang)柱和(he)轉(zhuan)向(xiang)(xiang)(xiang)(xiang)輪之間沒(mei)有機(ji)(ji)械連(lian)接,在轉(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)(qi)與轉(zhuan)向(xiang)(xiang)(xiang)(xiang)油缸(gang)之間是液壓(ya)(ya)(ya)管(guan)或軟(ruan)管(guan)鏈接。當轉(zhuan)動(dong)方向(xiang)(xiang)(xiang)(xiang)盤,轉(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)(qi)根據(ju)方向(xiang)(xiang)(xiang)(xiang)盤轉(zhuan)動(dong)比例輸(shu)送相(xiang)對(dui)的(de)(de)油量(liang),該(gai)油量(liang)直接流到操(cao)縱缸(gang)相(xiang)應一側(ce),同時另一側(ce)的(de)(de)油量(liang)回到油箱(xiang)。轉(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)(qi)按結構(gou)形式(shi)(shi)(shi)(shi)可(ke)分為(wei):有齒(chi)輪齒(chi)條式(shi)(shi)(shi)(shi)轉(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)(qi)、蝸桿曲柄(bing)指銷式(shi)(shi)(shi)(shi)轉(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)(qi)、循環球-齒(chi)條齒(chi)扇式(shi)(shi)(shi)(shi)轉(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)(qi)、循環球曲柄(bing)指銷式(shi)(shi)(shi)(shi)轉(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)(qi)、蝸桿滾輪式(shi)(shi)(shi)(shi)轉(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)(qi)等。按照(zhao)助(zhu)(zhu)(zhu)力(li)(li)(li)形式(shi)(shi)(shi)(shi)又(you)(you)可(ke)以(yi)分:為(wei)機(ji)(ji)械式(shi)(shi)(shi)(shi)(無助(zhu)(zhu)(zhu)力(li)(li)(li))轉(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)(qi),和(he)動(dong)力(li)(li)(li)式(shi)(shi)(shi)(shi)(有助(zhu)(zhu)(zhu)力(li)(li)(li))轉(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)(qi)兩種,其中動(dong)力(li)(li)(li)轉(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)(qi)又(you)(you)可(ke)以(yi)分為(wei)氣壓(ya)(ya)(ya)動(dong)力(li)(li)(li)式(shi)(shi)(shi)(shi)、液壓(ya)(ya)(ya)動(dong)力(li)(li)(li)式(shi)(shi)(shi)(shi)、電動(dong)助(zhu)(zhu)(zhu)力(li)(li)(li)式(shi)(shi)(shi)(shi)、電液助(zhu)(zhu)(zhu)力(li)(li)(li)式(shi)(shi)(shi)(shi)等種類。
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