轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)機總成即轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi),又(you)名轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)機、方(fang)向(xiang)(xiang)(xiang)(xiang)機,它(ta)是轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)系中最重要的(de)部件。它(ta)的(de)作用是:增(zeng)大轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)盤傳(chuan)到轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)傳(chuan)動(dong)(dong)(dong)機構(gou)的(de)力和改變力的(de)傳(chuan)遞方(fang)向(xiang)(xiang)(xiang)(xiang)。轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)的(de)操縱是全液(ye)壓(ya)式(shi)(shi)(shi),也(ye)就(jiu)是說在轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)柱和轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)輪之(zhi)間沒有機械連接(jie),在轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)與轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)油(you)缸之(zhi)間是液(ye)壓(ya)管或(huo)軟(ruan)管鏈接(jie)。當轉(zhuan)(zhuan)動(dong)(dong)(dong)方(fang)向(xiang)(xiang)(xiang)(xiang)盤,轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)根據方(fang)向(xiang)(xiang)(xiang)(xiang)盤轉(zhuan)(zhuan)動(dong)(dong)(dong)比例輸送相對的(de)油(you)量,該油(you)量直(zhi)接(jie)流到操縱缸相應一側,同時另一側的(de)油(you)量回到油(you)箱。轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)按(an)結構(gou)形式(shi)(shi)(shi)可(ke)分為(wei):有齒輪齒條(tiao)式(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)、蝸(gua)桿(gan)(gan)曲(qu)柄指銷式(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)、循(xun)環(huan)球-齒條(tiao)齒扇式(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)、循(xun)環(huan)球曲(qu)柄指銷式(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)、蝸(gua)桿(gan)(gan)滾輪式(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)等(deng)(deng)。按(an)照助(zhu)力形式(shi)(shi)(shi)又(you)可(ke)以(yi)分:為(wei)機械式(shi)(shi)(shi)(無(wu)助(zhu)力)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi),和動(dong)(dong)(dong)力式(shi)(shi)(shi)(有助(zhu)力)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)兩種,其中動(dong)(dong)(dong)力轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)(xiang)器(qi)(qi)(qi)又(you)可(ke)以(yi)分為(wei)氣(qi)壓(ya)動(dong)(dong)(dong)力式(shi)(shi)(shi)、液(ye)壓(ya)動(dong)(dong)(dong)力式(shi)(shi)(shi)、電動(dong)(dong)(dong)助(zhu)力式(shi)(shi)(shi)、電液(ye)助(zhu)力式(shi)(shi)(shi)等(deng)(deng)種類。
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