意大利ATOS比例閥主要體現在以下幾點: 1.驅動(dong)裝置不同。比例閥的(de)驅動(dong)裝置是比例電磁鐵;伺(si)服閥的(de)驅動(dong)裝置是力馬(ma)達(da)或力矩馬(ma)達(da); 2.性能參(can)數(shu)不(bu)同(tong)。滯環(huan)(huan)(huan)、中(zhong)位死區、頻寬、過濾精度等特性不(bu)同(tong),因此應(ying)用(yong)(yong)場合(he)不(bu)同(tong),伺(si)(si)服閥和伺(si)(si)服比例(li)閥主(zhu)要(yao)(yao)應(ying)用(yong)(yong)在閉環(huan)(huan)(huan)控制系統,其它結構的比例(li)閥主(zhu)要(yao)(yao)應(ying)用(yong)(yong)在開環(huan)(huan)(huan)控系統及閉環(huan)(huan)(huan)速度控制系統; - 伺(si)服閥(fa)中(zhong)位沒有死區(qu),比例閥(fa)有中(zhong)位死區(qu);
- 伺服閥的(de)頻響(xiang)(響(xiang)應頻率)更高(gao),可以高(gao)達(da)200Hz左右,比例閥一(yi)般(ban)zui高(gao)幾十Hz;
- 伺服閥(fa)(fa)對液(ye)壓(ya)油液(ye)的要求更高,需要精過(guo)濾才行,否則(ze)容易堵塞,比例閥(fa)(fa)要求低一些(xie);
3.閥(fa)(fa)(fa)(fa)(fa)芯(xin)(xin)結構及加工精度不同。比例閥(fa)(fa)(fa)(fa)(fa)采用閥(fa)(fa)(fa)(fa)(fa)芯(xin)(xin)+閥(fa)(fa)(fa)(fa)(fa)體(ti)結構,閥(fa)(fa)(fa)(fa)(fa)體(ti)兼(jian)作閥(fa)(fa)(fa)(fa)(fa)套。伺服閥(fa)(fa)(fa)(fa)(fa)和(he)伺服比例閥(fa)(fa)(fa)(fa)(fa)采用閥(fa)(fa)(fa)(fa)(fa)芯(xin)(xin)+閥(fa)(fa)(fa)(fa)(fa)套的結構。 4.中位機(ji)能種類不同。比例換(huan)向閥(fa)具有與(yu)普通換(huan)向閥(fa)相似的中位機(ji)能,而伺服(fu)閥(fa)中位機(ji)能只有O型(Rexroth產(chan)品的E型)。 5.閥的額定壓(ya)降不(bu)同。 電氣比例閥(fa)(fa)自動(dong)控(kong)(kong)制(zhi)(zhi)(zhi)可分(fen)(fen)成(cheng)斷(duan)(duan)續控(kong)(kong)制(zhi)(zhi)(zhi)和連續控(kong)(kong)制(zhi)(zhi)(zhi)。斷(duan)(duan)續控(kong)(kong)制(zhi)(zhi)(zhi)即開(kai)關控(kong)(kong)制(zhi)(zhi)(zhi)。氣動(dong)控(kong)(kong)制(zhi)(zhi)(zhi)系(xi)統中使用動(dong)作頻(pin)率(lv)較低的開(kai)關式(ON-OFF)的換向閥(fa)(fa)來控(kong)(kong)制(zhi)(zhi)(zhi)氣路(lu)的通斷(duan)(duan)。靠減壓閥(fa)(fa)來調節(jie)所(suo)需(xu)要的壓力,靠節(jie)流(liu)閥(fa)(fa)來調節(jie)所(suo)需(xu)要的流(liu)量(liang)(liang)。這種傳統的氣動(dong)控(kong)(kong)制(zhi)(zhi)(zhi)系(xi)統要想要有多個(ge)輸出(chu)(chu)力和多個(ge)運動(dong)速(su)度(du),就需(xu)要多個(ge)減壓閥(fa)(fa)、節(jie)流(liu)閥(fa)(fa)及換向閥(fa)(fa)。這樣,不僅元(yuan)件需(xu)要多,成(cheng)本高,構成(cheng)系(xi)統復雜,且許多元(yuan)件都需(xu)要預先進行人(ren)工調節(jie)。電氣比例閥(fa)(fa)控(kong)(kong)制(zhi)(zhi)(zhi)屬于連續控(kong)(kong)制(zhi)(zhi)(zhi),其特點是輸出(chu)(chu)量(liang)(liang)隨(sui)輸入(ru)量(liang)(liang)的變化而變化,輸出(chu)(chu)量(liang)(liang)與(yu)輸入(ru)量(liang)(liang)之(zhi)間(jian)存(cun)在(zai)一定的比例關系(xi)。比例控(kong)(kong)制(zhi)(zhi)(zhi)有開(kai)環(huan)控(kong)(kong)制(zhi)(zhi)(zhi)和閉環(huan)控(kong)(kong)制(zhi)(zhi)(zhi)之(zhi)分(fen)(fen)。 意大利ATOS比例閥型(xing)號表: 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? |