意大利ATOS比例閥主要體現在以下幾點: 1.驅(qu)動裝(zhuang)置不(bu)同。比例(li)閥的驅(qu)動裝(zhuang)置是(shi)比例(li)電磁鐵;伺(si)服閥的驅(qu)動裝(zhuang)置是(shi)力馬達或(huo)力矩(ju)馬達; 2.性(xing)能參(can)數不同。滯環(huan)、中位死(si)區、頻寬、過(guo)濾精度(du)等特性(xing)不同,因此(ci)應(ying)用(yong)(yong)場合不同,伺服閥和伺服比(bi)例閥主要應(ying)用(yong)(yong)在閉環(huan)控制系(xi)統(tong),其它結構(gou)的(de)比(bi)例閥主要應(ying)用(yong)(yong)在開(kai)環(huan)控系(xi)統(tong)及閉環(huan)速(su)度(du)控制系(xi)統(tong); - 伺服閥中位(wei)沒有(you)死(si)區,比例閥有(you)中位(wei)死(si)區;
- 伺服(fu)閥的(de)頻響(響應頻率)更高(gao),可(ke)以高(gao)達200Hz左右,比例閥一般zui高(gao)幾十(shi)Hz;
- 伺服閥(fa)對液壓(ya)油液的要求(qiu)更高,需要精過濾(lv)才行,否則(ze)容易堵塞(sai),比例閥(fa)要求(qiu)低一些;
3.閥(fa)(fa)芯結構(gou)及(ji)加工精度(du)不(bu)同(tong)。比例(li)閥(fa)(fa)采(cai)用閥(fa)(fa)芯+閥(fa)(fa)體結構(gou),閥(fa)(fa)體兼作(zuo)閥(fa)(fa)套。伺服(fu)閥(fa)(fa)和(he)伺服(fu)比例(li)閥(fa)(fa)采(cai)用閥(fa)(fa)芯+閥(fa)(fa)套的結構(gou)。 4.中位機能種(zhong)類(lei)不(bu)同。比例(li)換向閥具(ju)有(you)與(yu)普通(tong)換向閥相似(si)的(de)中位機能,而伺服閥中位機能只有(you)O型(xing)(Rexroth產(chan)品的(de)E型(xing))。 5.閥(fa)的額定壓降(jiang)不同。 電氣(qi)比例(li)閥(fa)(fa)(fa)自動控(kong)制(zhi)(zhi)(zhi)可分(fen)成(cheng)(cheng)斷(duan)續控(kong)制(zhi)(zhi)(zhi)和連續控(kong)制(zhi)(zhi)(zhi)。斷(duan)續控(kong)制(zhi)(zhi)(zhi)即開(kai)關(guan)(guan)控(kong)制(zhi)(zhi)(zhi)。氣(qi)動控(kong)制(zhi)(zhi)(zhi)系(xi)統中使用動作頻(pin)率較低的(de)(de)開(kai)關(guan)(guan)式(ON-OFF)的(de)(de)換向(xiang)閥(fa)(fa)(fa)來控(kong)制(zhi)(zhi)(zhi)氣(qi)路的(de)(de)通(tong)斷(duan)。靠減壓(ya)閥(fa)(fa)(fa)來調節所需(xu)(xu)要(yao)(yao)的(de)(de)壓(ya)力,靠節流閥(fa)(fa)(fa)來調節所需(xu)(xu)要(yao)(yao)的(de)(de)流量(liang)(liang)。這種傳統的(de)(de)氣(qi)動控(kong)制(zhi)(zhi)(zhi)系(xi)統要(yao)(yao)想(xiang)要(yao)(yao)有(you)多(duo)(duo)個輸(shu)(shu)(shu)出力和多(duo)(duo)個運動速(su)度(du),就需(xu)(xu)要(yao)(yao)多(duo)(duo)個減壓(ya)閥(fa)(fa)(fa)、節流閥(fa)(fa)(fa)及(ji)換向(xiang)閥(fa)(fa)(fa)。這樣(yang),不僅元件(jian)需(xu)(xu)要(yao)(yao)多(duo)(duo),成(cheng)(cheng)本高,構成(cheng)(cheng)系(xi)統復雜,且許多(duo)(duo)元件(jian)都(dou)需(xu)(xu)要(yao)(yao)預先進行人工調節。電氣(qi)比例(li)閥(fa)(fa)(fa)控(kong)制(zhi)(zhi)(zhi)屬于連續控(kong)制(zhi)(zhi)(zhi),其特點(dian)是輸(shu)(shu)(shu)出量(liang)(liang)隨輸(shu)(shu)(shu)入量(liang)(liang)的(de)(de)變(bian)化(hua)而變(bian)化(hua),輸(shu)(shu)(shu)出量(liang)(liang)與(yu)輸(shu)(shu)(shu)入量(liang)(liang)之間存(cun)在一定的(de)(de)比例(li)關(guan)(guan)系(xi)。比例(li)控(kong)制(zhi)(zhi)(zhi)有(you)開(kai)環控(kong)制(zhi)(zhi)(zhi)和閉(bi)環控(kong)制(zhi)(zhi)(zhi)之分(fen)。 意大利ATOS比例閥型(xing)號(hao)表: LIMZA-A-1/180/M 20 LIMZA-A-3/180/M 40 LIMZO-A-3/210 LIMZO-A-4/210 LIMZO-A-5/315/P 30 LIMZO-AE-4/315 10 LIMZO-TER-4/210 50 LIMZO-TER-4/210/I LIQV-2 20 LIQV-2/K LIQZO-A-252S4 LIQZO-L-252L4 50 LIQZO-L-322L4 50 LIQZO-LE-402L4 50 LIQZO-LE-502L4 50 LIQZO-LE-632L4 51 LIQZO-T-252L4 LIQZO-T-252L4 50 /PE LIQZO-T-322L4 50 LIQZO-T-402L4 LIQZO-TE-322L4 50 LIRA-1/100 20 LIRA-1/210 20 LIRA-2/210/V 20 LIRA-3/100 LIRA-4/210/V 11 LIRZO-A-1/210 QVHZO-A-06/12 20 QVHZO-A-06/18 QVHZO-A-06/3 QVHZO-A-06/36 QVHZO-A-06/45 QVHZO-AE-06/3/I 10 QVHZO-AE-06/45/I QVHZO-T-06/12 31 QVHZO-T-06/3 31/WG QVHZO-TE-06/18 40 QVHZO-TE-06/18/I 40 QVHZO-TE-06/3 40 QVKMZOR-A-10/90/210/18 QVKZOR-A-10/65 QVKZOR-AE-10/90 10 QVKZOR-AES-BC-10/65 10? |