意大利ATOS比例閥主要體現在以下幾點: 1.驅動裝置(zhi)不同。比例閥的(de)驅動裝置(zhi)是比例電磁鐵;伺(si)服閥的(de)驅動裝置(zhi)是力(li)馬達(da)或力(li)矩馬達(da); 2.性(xing)能參數不同。滯環(huan)(huan)、中位死區、頻寬、過(guo)濾(lv)精度(du)等特性(xing)不同,因此應(ying)用(yong)場合(he)不同,伺(si)服閥(fa)和伺(si)服比(bi)例(li)閥(fa)主(zhu)要應(ying)用(yong)在閉(bi)環(huan)(huan)控制系統(tong),其它結構的比(bi)例(li)閥(fa)主(zhu)要應(ying)用(yong)在開(kai)環(huan)(huan)控系統(tong)及閉(bi)環(huan)(huan)速(su)度(du)控制系統(tong); - 伺服閥中位沒有死(si)(si)區(qu),比例閥有中位死(si)(si)區(qu);
- 伺服閥(fa)的頻響(響應頻率)更高(gao),可以高(gao)達(da)200Hz左右(you),比例(li)閥(fa)一般zui高(gao)幾十(shi)Hz;
- 伺服閥(fa)對液壓油液的(de)要(yao)求(qiu)更高,需要(yao)精過濾才(cai)行,否(fou)則容易(yi)堵(du)塞(sai),比例閥(fa)要(yao)求(qiu)低(di)一些;
3.閥芯(xin)(xin)結構及加工精度不同。比例(li)閥采用(yong)閥芯(xin)(xin)+閥體(ti)結構,閥體(ti)兼作閥套。伺服閥和(he)伺服比例(li)閥采用(yong)閥芯(xin)(xin)+閥套的結構。 4.中(zhong)(zhong)位機(ji)能種類(lei)不(bu)同(tong)。比(bi)例換向閥(fa)具有與普通(tong)換向閥(fa)相(xiang)似(si)的(de)中(zhong)(zhong)位機(ji)能,而伺服(fu)閥(fa)中(zhong)(zhong)位機(ji)能只有O型(xing)(Rexroth產品的(de)E型(xing))。 5.閥的額定壓降不同。 電氣比例(li)閥(fa)(fa)自動控(kong)(kong)制(zhi)(zhi)可分(fen)成(cheng)(cheng)斷(duan)續(xu)控(kong)(kong)制(zhi)(zhi)和連續(xu)控(kong)(kong)制(zhi)(zhi)。斷(duan)續(xu)控(kong)(kong)制(zhi)(zhi)即開關(guan)控(kong)(kong)制(zhi)(zhi)。氣動控(kong)(kong)制(zhi)(zhi)系(xi)統中使用動作(zuo)頻率較低的(de)開關(guan)式(ON-OFF)的(de)換(huan)向(xiang)閥(fa)(fa)來(lai)控(kong)(kong)制(zhi)(zhi)氣路(lu)的(de)通斷(duan)。靠減壓閥(fa)(fa)來(lai)調(diao)節(jie)所(suo)需(xu)(xu)要(yao)(yao)(yao)的(de)壓力,靠節(jie)流閥(fa)(fa)來(lai)調(diao)節(jie)所(suo)需(xu)(xu)要(yao)(yao)(yao)的(de)流量(liang)(liang)(liang)。這種傳統的(de)氣動控(kong)(kong)制(zhi)(zhi)系(xi)統要(yao)(yao)(yao)想要(yao)(yao)(yao)有(you)多(duo)個(ge)輸出力和多(duo)個(ge)運動速度,就(jiu)需(xu)(xu)要(yao)(yao)(yao)多(duo)個(ge)減壓閥(fa)(fa)、節(jie)流閥(fa)(fa)及換(huan)向(xiang)閥(fa)(fa)。這樣(yang),不僅元件需(xu)(xu)要(yao)(yao)(yao)多(duo),成(cheng)(cheng)本高,構成(cheng)(cheng)系(xi)統復雜,且許多(duo)元件都(dou)需(xu)(xu)要(yao)(yao)(yao)預先進行人(ren)工調(diao)節(jie)。電氣比例(li)閥(fa)(fa)控(kong)(kong)制(zhi)(zhi)屬于連續(xu)控(kong)(kong)制(zhi)(zhi),其特點是輸出量(liang)(liang)(liang)隨輸入量(liang)(liang)(liang)的(de)變化而變化,輸出量(liang)(liang)(liang)與輸入量(liang)(liang)(liang)之間存在(zai)一(yi)定的(de)比例(li)關(guan)系(xi)。比例(li)控(kong)(kong)制(zhi)(zhi)有(you)開環控(kong)(kong)制(zhi)(zhi)和閉環控(kong)(kong)制(zhi)(zhi)之分(fen)。 意大利ATOS比例閥型號(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? |