意大利ATOS比例閥主要體現在以下幾點: 1.驅(qu)動(dong)裝置(zhi)不同。比例閥的驅(qu)動(dong)裝置(zhi)是比例電磁(ci)鐵;伺服(fu)閥的驅(qu)動(dong)裝置(zhi)是力馬達或力矩(ju)馬達; 2.性(xing)能參數不同。滯環(huan)、中位死區、頻寬、過濾精度(du)等特性(xing)不同,因此應(ying)用(yong)場合(he)不同,伺服閥和伺服比例閥主要應(ying)用(yong)在閉環(huan)控(kong)制系統,其它結(jie)構的(de)比例閥主要應(ying)用(yong)在開(kai)環(huan)控(kong)系統及閉環(huan)速(su)度(du)控(kong)制系統; - 伺服閥中位(wei)沒有死(si)區(qu),比例閥有中位(wei)死(si)區(qu);
- 伺服閥(fa)的(de)頻(pin)響(響應(ying)頻(pin)率(lv))更高(gao)(gao)(gao),可以高(gao)(gao)(gao)達(da)200Hz左右,比例閥(fa)一般zui高(gao)(gao)(gao)幾十(shi)Hz;
- 伺服閥(fa)對液(ye)壓油液(ye)的要求更高(gao),需(xu)要精過濾才行,否則容易堵塞(sai),比例(li)閥(fa)要求低一些;
3.閥芯(xin)結構及加工(gong)精度不同。比(bi)例閥采用閥芯(xin)+閥體結構,閥體兼(jian)作閥套(tao)。伺服閥和(he)伺服比(bi)例閥采用閥芯(xin)+閥套(tao)的結構。 4.中位機能(neng)(neng)(neng)種類(lei)不同(tong)。比例(li)換向閥具有(you)與普通(tong)換向閥相似的(de)中位機能(neng)(neng)(neng),而(er)伺服閥中位機能(neng)(neng)(neng)只有(you)O型(Rexroth產品的(de)E型)。 5.閥的額定壓降(jiang)不同(tong)。 電氣(qi)比(bi)例(li)(li)閥自動(dong)控制(zhi)(zhi)(zhi)(zhi)可分成(cheng)(cheng)斷續(xu)(xu)控制(zhi)(zhi)(zhi)(zhi)和(he)連(lian)續(xu)(xu)控制(zhi)(zhi)(zhi)(zhi)。斷續(xu)(xu)控制(zhi)(zhi)(zhi)(zhi)即開關控制(zhi)(zhi)(zhi)(zhi)。氣(qi)動(dong)控制(zhi)(zhi)(zhi)(zhi)系統(tong)中使用(yong)動(dong)作頻率較低的(de)(de)開關式(ON-OFF)的(de)(de)換(huan)向閥來(lai)控制(zhi)(zhi)(zhi)(zhi)氣(qi)路的(de)(de)通斷。靠(kao)減(jian)壓(ya)閥來(lai)調(diao)節所需要(yao)(yao)(yao)(yao)的(de)(de)壓(ya)力,靠(kao)節流閥來(lai)調(diao)節所需要(yao)(yao)(yao)(yao)的(de)(de)流量(liang)(liang)。這種傳(chuan)統(tong)的(de)(de)氣(qi)動(dong)控制(zhi)(zhi)(zhi)(zhi)系統(tong)要(yao)(yao)(yao)(yao)想要(yao)(yao)(yao)(yao)有多(duo)(duo)個輸(shu)(shu)出力和(he)多(duo)(duo)個運動(dong)速度,就需要(yao)(yao)(yao)(yao)多(duo)(duo)個減(jian)壓(ya)閥、節流閥及換(huan)向閥。這樣,不僅元(yuan)件需要(yao)(yao)(yao)(yao)多(duo)(duo),成(cheng)(cheng)本高,構(gou)成(cheng)(cheng)系統(tong)復雜,且許多(duo)(duo)元(yuan)件都需要(yao)(yao)(yao)(yao)預(yu)先(xian)進行人工調(diao)節。電氣(qi)比(bi)例(li)(li)閥控制(zhi)(zhi)(zhi)(zhi)屬于連(lian)續(xu)(xu)控制(zhi)(zhi)(zhi)(zhi),其特(te)點是輸(shu)(shu)出量(liang)(liang)隨輸(shu)(shu)入(ru)量(liang)(liang)的(de)(de)變化而變化,輸(shu)(shu)出量(liang)(liang)與輸(shu)(shu)入(ru)量(liang)(liang)之間存在一定的(de)(de)比(bi)例(li)(li)關系。比(bi)例(li)(li)控制(zhi)(zhi)(zhi)(zhi)有開環(huan)控制(zhi)(zhi)(zhi)(zhi)和(he)閉環(huan)控制(zhi)(zhi)(zhi)(zhi)之分。 意大利ATOS比例閥型號表(biao): 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? |