液控(kong)單向(xiang)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)也(ye)稱(cheng)(cheng)單向(xiang)閉鎖閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)或(huo)保壓(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa) 。 它(ta)與(yu)單向(xiang)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)相同, 用(yong)(yong)(yong)以防止(zhi)油(you)(you)(you)流(liu)反向(xiang)流(liu)動 。 但在液壓(ya)(ya)(ya)(ya)回路(lu)(lu)中(zhong)需(xu)要(yao)油(you)(you)(you)流(liu)反向(xiang)流(liu)動時又可利用(yong)(yong)(yong)控(kong)制油(you)(you)(you)壓(ya)(ya)(ya)(ya), 打開單向(xiang)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa), 使油(you)(you)(you)流(liu)在兩個(ge)方向(xiang)都可流(liu)動 。液控(kong)單向(xiang)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)采用(yong)(yong)(yong)錐形閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)芯, 因此(ci)密(mi)封性能好。 在要(yao)求(qiu)封閉油(you)(you)(you)路(lu)(lu)時, 可用(yong)(yong)(yong)此(ci)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)作(zuo)為(wei)油(you)(you)(you)路(lu)(lu)的(de)(de)單向(xiang)鎖緊而起保壓(ya)(ya)(ya)(ya)作(zuo)用(yong)(yong)(yong)。液控(kong)單向(xiang)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)控(kong)制油(you)(you)(you)的(de)(de)泄(xie)漏方式(shi)有(you)內泄(xie)式(shi)和(he)(he)外泄(xie)式(shi)二種 。在油(you)(you)(you)流(liu)反向(xiang)出(chu)口無(wu)背壓(ya)(ya)(ya)(ya)的(de)(de)油(you)(you)(you)路(lu)(lu)中(zhong)可用(yong)(yong)(yong)內泄(xie)式(shi); 否則需(xu)用(yong)(yong)(yong)外泄(xie)式(shi), 以降低(di)控(kong)制油(you)(you)(you)壓(ya)(ya)(ya)(ya)力(li)(li) 。單向(xiang)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)又稱(cheng)(cheng)止(zhi)回閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)或(huo)逆止(zhi)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa) 。用(yong)(yong)(yong)于液壓(ya)(ya)(ya)(ya)系統中(zhong)防止(zhi)油(you)(you)(you)流(liu)反向(xiang)流(liu)動 。單向(xiang)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)有(you)直(zhi)通(tong)式(shi)和(he)(he)直(zhi)角(jiao)式(shi)兩種 。直(zhi)通(tong)式(shi)單向(xiang)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)用(yong)(yong)(yong)螺紋連(lian)接(jie)(jie)安(an)裝在管(guan)路(lu)(lu)上 。直(zhi)角(jiao)式(shi)單向(xiang)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)有(you)螺紋連(lian)接(jie)(jie), 板式(shi)連(lian)接(jie)(jie)和(he)(he)法蘭連(lian)接(jie)(jie)三種型式(shi)。開啟壓(ya)(ya)(ya)(ya)力(li)(li)大于0.08MPa的(de)(de)單向(xiang)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)可作(zuo)為(wei)背壓(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)使用(yong)(yong)(yong)。