轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)機總成(cheng)即轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi),又(you)名(ming)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)機、方向(xiang)(xiang)(xiang)(xiang)機,它是(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)系中最重要的(de)部件。它的(de)作用是(shi)(shi)(shi):增(zeng)大轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)盤傳(chuan)到(dao)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)傳(chuan)動(dong)(dong)(dong)(dong)機構的(de)力(li)和(he)(he)改變力(li)的(de)傳(chuan)遞(di)方向(xiang)(xiang)(xiang)(xiang)。轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)的(de)操(cao)縱是(shi)(shi)(shi)全液(ye)壓(ya)式(shi),也就是(shi)(shi)(shi)說在(zai)(zai)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)柱(zhu)和(he)(he)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)輪之(zhi)(zhi)間(jian)沒有(you)機械(xie)連(lian)接(jie),在(zai)(zai)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)與轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)油(you)(you)(you)缸之(zhi)(zhi)間(jian)是(shi)(shi)(shi)液(ye)壓(ya)管(guan)(guan)或軟管(guan)(guan)鏈接(jie)。當轉(zhuan)(zhuan)動(dong)(dong)(dong)(dong)方向(xiang)(xiang)(xiang)(xiang)盤,轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)根據方向(xiang)(xiang)(xiang)(xiang)盤轉(zhuan)(zhuan)動(dong)(dong)(dong)(dong)比例輸送相(xiang)對的(de)油(you)(you)(you)量(liang),該油(you)(you)(you)量(liang)直(zhi)接(jie)流到(dao)操(cao)縱缸相(xiang)應一側,同時另一側的(de)油(you)(you)(you)量(liang)回到(dao)油(you)(you)(you)箱。轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)按結(jie)構形(xing)式(shi)可(ke)分為:有(you)齒輪齒條(tiao)式(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)、蝸桿曲(qu)柄指(zhi)銷式(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)、循(xun)環球-齒條(tiao)齒扇式(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)、循(xun)環球曲(qu)柄指(zhi)銷式(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)、蝸桿滾輪式(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)等(deng)。按照助(zhu)(zhu)力(li)形(xing)式(shi)又(you)可(ke)以分:為機械(xie)式(shi)(無(wu)助(zhu)(zhu)力(li))轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi),和(he)(he)動(dong)(dong)(dong)(dong)力(li)式(shi)(有(you)助(zhu)(zhu)力(li))轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)兩種,其(qi)中動(dong)(dong)(dong)(dong)力(li)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)又(you)可(ke)以分為氣壓(ya)動(dong)(dong)(dong)(dong)力(li)式(shi)、液(ye)壓(ya)動(dong)(dong)(dong)(dong)力(li)式(shi)、電動(dong)(dong)(dong)(dong)助(zhu)(zhu)力(li)式(shi)、電液(ye)助(zhu)(zhu)力(li)式(shi)等(deng)種類。
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