轉(zhuan)向(xiang)(xiang)(xiang)機(ji)(ji)總成即轉(zhuan)向(xiang)(xiang)(xiang)器,又名轉(zhuan)向(xiang)(xiang)(xiang)機(ji)(ji)、方向(xiang)(xiang)(xiang)機(ji)(ji),它是(shi)轉(zhuan)向(xiang)(xiang)(xiang)系(xi)中(zhong)最重要(yao)的(de)(de)(de)(de)部件。它的(de)(de)(de)(de)作(zuo)用是(shi):增大轉(zhuan)向(xiang)(xiang)(xiang)盤(pan)傳到(dao)轉(zhuan)向(xiang)(xiang)(xiang)傳動(dong)(dong)(dong)機(ji)(ji)構的(de)(de)(de)(de)力(li)(li)和改變力(li)(li)的(de)(de)(de)(de)傳遞方向(xiang)(xiang)(xiang)。轉(zhuan)向(xiang)(xiang)(xiang)器的(de)(de)(de)(de)操(cao)縱是(shi)全(quan)液(ye)壓(ya)(ya)式(shi)(shi),也就是(shi)說在轉(zhuan)向(xiang)(xiang)(xiang)柱和轉(zhuan)向(xiang)(xiang)(xiang)輪之間沒有機(ji)(ji)械連接,在轉(zhuan)向(xiang)(xiang)(xiang)器與轉(zhuan)向(xiang)(xiang)(xiang)油(you)(you)缸之間是(shi)液(ye)壓(ya)(ya)管或軟管鏈接。當轉(zhuan)動(dong)(dong)(dong)方向(xiang)(xiang)(xiang)盤(pan),轉(zhuan)向(xiang)(xiang)(xiang)器根(gen)據方向(xiang)(xiang)(xiang)盤(pan)轉(zhuan)動(dong)(dong)(dong)比例輸送相(xiang)對的(de)(de)(de)(de)油(you)(you)量,該(gai)油(you)(you)量直接流到(dao)操(cao)縱缸相(xiang)應一側(ce),同時另一側(ce)的(de)(de)(de)(de)油(you)(you)量回到(dao)油(you)(you)箱。轉(zhuan)向(xiang)(xiang)(xiang)器按結構形式(shi)(shi)可(ke)分(fen)(fen)為(wei)(wei):有齒(chi)輪齒(chi)條(tiao)式(shi)(shi)轉(zhuan)向(xiang)(xiang)(xiang)器、蝸桿曲柄指銷(xiao)式(shi)(shi)轉(zhuan)向(xiang)(xiang)(xiang)器、循環球(qiu)-齒(chi)條(tiao)齒(chi)扇式(shi)(shi)轉(zhuan)向(xiang)(xiang)(xiang)器、循環球(qiu)曲柄指銷(xiao)式(shi)(shi)轉(zhuan)向(xiang)(xiang)(xiang)器、蝸桿滾輪式(shi)(shi)轉(zhuan)向(xiang)(xiang)(xiang)器等(deng)。按照助力(li)(li)形式(shi)(shi)又可(ke)以(yi)分(fen)(fen):為(wei)(wei)機(ji)(ji)械式(shi)(shi)(無助力(li)(li))轉(zhuan)向(xiang)(xiang)(xiang)器,和動(dong)(dong)(dong)力(li)(li)式(shi)(shi)(有助力(li)(li))轉(zhuan)向(xiang)(xiang)(xiang)器兩種(zhong),其中(zhong)動(dong)(dong)(dong)力(li)(li)轉(zhuan)向(xiang)(xiang)(xiang)器又可(ke)以(yi)分(fen)(fen)為(wei)(wei)氣(qi)壓(ya)(ya)動(dong)(dong)(dong)力(li)(li)式(shi)(shi)、液(ye)壓(ya)(ya)動(dong)(dong)(dong)力(li)(li)式(shi)(shi)、電動(dong)(dong)(dong)助力(li)(li)式(shi)(shi)、電液(ye)助力(li)(li)式(shi)(shi)等(deng)種(zhong)類。
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