了解REXROTH液壓方向短管閥性能參數

功能簡介:

這樣，在(zai)節(jie)流(liu)口(kou)面積(ji)調(diao)定以(yi)后(hou)，不論(lun)載(zai)(zai)荷壓力(li)如何變(bian)化，調(diao)速(su)閥(fa)(fa)都能(neng)保持通過節(jie)流(liu)閥(fa)(fa)的(de)(de)流(liu)量(liang)不變(bian)，從而使(shi)執行(xing)元件(jian)(jian)的(de)(de)運動(dong)速(su)度穩定。⑶分(fen)(fen)流(liu)閥(fa)(fa):不論(lun)載(zai)(zai)荷大(da)小(xiao)，能(neng)使(shi)同(tong)一油源(yuan)的(de)(de)兩個執行(xing)元件(jian)(jian)得(de)到相等流(liu)量(liang)的(de)(de)為(wei)等量(liang)分(fen)(fen)流(liu)閥(fa)(fa)或(huo)同(tong)步(bu)閥(fa)(fa);得(de)到按(an)比(bi)例分(fen)(fen)配流(liu)量(liang)的(de)(de)為(wei)比(bi)例分(fen)(fen)流(liu)閥(fa)(fa)。⑷集流(liu)閥(fa)(fa):作(zuo)用與分(fen)(fen)流(liu)閥(fa)(fa)相反，使(shi)流(liu)入集流(liu)閥(fa)(fa)的(de)(de)流(liu)量(liang)按(an)比(bi)例分(fen)(fen)配。⑸分(fen)(fen)流(liu)集流(liu)閥(fa)(fa):兼具分(fen)(fen)流(liu)閥(fa)(fa)和集流(liu)閥(fa)(fa)兩種功(gong)能(neng)。

按(an)用途分(fen)為(wei)單向(xiang)閥(fa)和換(huan)(huan)向(xiang)閥(fa)。單向(xiang)閥(fa):只允許流體在管道(dao)中單向(xiang)接通(tong)(tong)，反向(xiang)即(ji)切斷(duan)。換(huan)(huan)向(xiang)閥(fa):改變(bian)不同管路間的(de)通(tong)(tong)、斷(duan)關(guan)系。根(gen)據閥(fa)芯(xin)在閥(fa)體中的(de)工(gong)作位(wei)置數分(fen)兩位(wei)、三位(wei)等;根(gen)據所控制的(de)通(tong)(tong)道(dao)數分(fen)兩通(tong)(tong)、三通(tong)(tong)、四(si)通(tong)(tong)、五通(tong)(tong)等;根(gen)據閥(fa)芯(xin)驅動(dong)方(fang)式分(fen)手動(dong)，機動(dong)，電動(dong)，液動(dong)等。圖2為(wei)三位(wei)四(si)通(tong)(tong)換(huan)(huan)向(xiang)閥(fa)的(de)工(gong)作原理。P 為(wei)供油(you)(you)口(kou)，O 為(wei)回油(you)(you)口(kou)，A 、B 是通(tong)(tong)向(xiang)執(zhi)行(xing)元件的(de)輸出(chu)口(kou)。當閥(fa)芯(xin)處於中位(wei)時(shi)，全部(bu)油(you)(you)口(kou)切斷(duan)，執(zhi)行(xing)元件不動(dong);當閥(fa)芯(xin)移到右位(wei)時(shi)，P 與(yu)A 通(tong)(tong)，B 與(yu)O 通(tong)(tong);當閥(fa)芯(xin)移到左位(wei)時(shi)，P 與(yu)B 通(tong)(tong)，A 與(yu)O 通(tong)(tong)。這樣(yang)，執(zhi)行(xing)元件就能作正、反向(xiang)運動(dong)。

按(an)用(yong)途分(fen)為(wei)溢(yi)流閥(fa)﹑減壓(ya)(ya)(ya)(ya)閥(fa)和(he)順(shun)序閥(fa)。⑴溢(yi)流閥(fa):能(neng)控制液(ye)壓(ya)(ya)(ya)(ya)系統在(zai)達到調(diao)定(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)力(li)(li)時保(bao)(bao)(bao)持(chi)恒(heng)定(ding)(ding)(ding)狀(zhuang)態。用(yong)於(wu)過(guo)載保(bao)(bao)(bao)護(hu)的(de)(de)溢(yi)流閥(fa)稱(cheng)為(wei)安全(quan)閥(fa)。當系統發(fa)生(sheng)故障，壓(ya)(ya)(ya)(ya)力(li)(li)升高到可能(neng)造成破壞的(de)(de)限(xian)定(ding)(ding)(ding)值(zhi)時，閥(fa)口會打(da)開(kai)而溢(yi)流，以(yi)保(bao)(bao)(bao)證系統的(de)(de)安全(quan)。⑵減壓(ya)(ya)(ya)(ya)閥(fa):能(neng)控制分(fen)支回路得(de)到比主回路油壓(ya)(ya)(ya)(ya)低的(de)(de)穩定(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)力(li)(li)。減壓(ya)(ya)(ya)(ya)閥(fa)按(an)它(ta)所(suo)控制的(de)(de)壓(ya)(ya)(ya)(ya)力(li)(li)功能(neng)不同，又可分(fen)為(wei)定(ding)(ding)(ding)值(zhi)減壓(ya)(ya)(ya)(ya)閥(fa)(輸(shu)出壓(ya)(ya)(ya)(ya)力(li)(li)為(wei)恒(heng)定(ding)(ding)(ding)值(zhi))﹑定(ding)(ding)(ding)差減壓(ya)(ya)(ya)(ya)閥(fa)(輸(shu)入(ru)與(yu)輸(shu)出壓(ya)(ya)(ya)(ya)力(li)(li)差為(wei)定(ding)(ding)(ding)值(zhi))和(he)定(ding)(ding)(ding)比減壓(ya)(ya)(ya)(ya)閥(fa)(輸(shu)入(ru)與(yu)輸(shu)出壓(ya)(ya)(ya)(ya)力(li)(li)間保(bao)(bao)(bao)持(chi)一定(ding)(ding)(ding)的(de)(de)比例)。⑶順(shun)序閥(fa):能(neng)使一個執行(xing)元件(jian)(如液(ye)壓(ya)(ya)(ya)(ya)缸(gang)(gang)﹑液(ye)壓(ya)(ya)(ya)(ya)馬(ma)達等)動(dong)作(zuo)以(yi)后，再按(an)順(shun)序使其他(ta)執行(xing)元件(jian)動(dong)作(zuo)。油泵產(chan)生(sheng)的(de)(de)壓(ya)(ya)(ya)(ya)力(li)(li)先推動(dong)液(ye)壓(ya)(ya)(ya)(ya)缸(gang)(gang)1運(yun)動(dong)，同時通(tong)過(guo)順(shun)序閥(fa)的(de)(de)進(jin)油口作(zuo)用(yong)在(zai)面積A 上，當液(ye)壓(ya)(ya)(ya)(ya)缸(gang)(gang)1運(yun)動(dong)成后，壓(ya)(ya)(ya)(ya)力(li)(li)升高，作(zuo)用(yong)在(zai)面積A 的(de)(de)向上推力(li)(li)大於(wu)彈簧的(de)(de)調(diao)定(ding)(ding)(ding)值(zhi)后，閥(fa)芯上升使進(jin)油口與(yu)出油口相(xiang)通(tong)，使液(ye)壓(ya)(ya)(ya)(ya)缸(gang)(gang)2運(yun)動(dong)。

利用(yong)調(diao)節(jie)閥(fa)芯和閥(fa)體(ti)間的(de)節(jie)流(liu)口面積和它(ta)所產生的(de)局部阻(zu)力(li)對流(liu)量進行調(diao)節(jie)，從而(er)控(kong)制執行元件的(de)運(yun)(yun)動(dong)(dong)速度(du)(du)。流(liu)量控(kong)制閥(fa)按用(yong)途(tu)分為(wei) 5種。⑴節(jie)流(liu)閥(fa):在調(diao)定(ding)節(jie)流(liu)口面積后，能(neng)使載荷壓(ya)力(li)變(bian)化(hua)不(bu)大和運(yun)(yun)動(dong)(dong)均(jun)勻性要求不(bu)高的(de)執行元件的(de)運(yun)(yun)動(dong)(dong)速度(du)(du)基本上保(bao)持穩定(ding)。⑵調(diao)速閥(fa):在載荷壓(ya)力(li)變(bian)化(hua)時能(neng)保(bao)持節(jie)流(liu)閥(fa)的(de)進出口壓(ya)差為(wei)定(ding)值。

了解REXROTH液壓方向短管閥性能參數