意大利ATOS比例閥主要體現在以下幾點: 1.驅動裝置不同。比例(li)閥(fa)的驅動裝置是(shi)比例(li)電磁鐵(tie);伺服閥(fa)的驅動裝置是(shi)力馬達(da)或力矩馬達(da); 2.性能參(can)數不(bu)同。滯(zhi)環(huan)(huan)(huan)、中位(wei)死區、頻(pin)寬、過濾精度等特性不(bu)同,因(yin)此應(ying)用(yong)場合(he)不(bu)同,伺服(fu)閥(fa)和伺服(fu)比例閥(fa)主要(yao)(yao)應(ying)用(yong)在(zai)閉(bi)環(huan)(huan)(huan)控制(zhi)系(xi)統,其它結構的比例閥(fa)主要(yao)(yao)應(ying)用(yong)在(zai)開環(huan)(huan)(huan)控系(xi)統及(ji)閉(bi)環(huan)(huan)(huan)速度控制(zhi)系(xi)統; - 伺服閥中位沒有死(si)區(qu),比例(li)閥有中位死(si)區(qu);
- 伺服(fu)閥的頻(pin)響(響應(ying)頻(pin)率)更高,可以高達200Hz左(zuo)右,比例閥一般zui高幾十Hz;
- 伺服閥對液壓(ya)油液的(de)要求更高,需要精過濾才(cai)行,否則容易堵(du)塞,比(bi)例閥要求低一些;
3.閥(fa)(fa)(fa)(fa)芯(xin)結構及加(jia)工精度不同。比例(li)閥(fa)(fa)(fa)(fa)采(cai)用閥(fa)(fa)(fa)(fa)芯(xin)+閥(fa)(fa)(fa)(fa)體(ti)(ti)結構,閥(fa)(fa)(fa)(fa)體(ti)(ti)兼作閥(fa)(fa)(fa)(fa)套。伺服閥(fa)(fa)(fa)(fa)和伺服比例(li)閥(fa)(fa)(fa)(fa)采(cai)用閥(fa)(fa)(fa)(fa)芯(xin)+閥(fa)(fa)(fa)(fa)套的結構。 4.中(zhong)位(wei)機能種類不(bu)同。比例換向(xiang)閥(fa)(fa)具有與普通換向(xiang)閥(fa)(fa)相似的中(zhong)位(wei)機能,而伺服閥(fa)(fa)中(zhong)位(wei)機能只有O型(Rexroth產品(pin)的E型)。 5.閥的(de)額定壓(ya)降不同。 電氣(qi)比(bi)例(li)(li)閥(fa)(fa)自動控(kong)(kong)(kong)制(zhi)(zhi)(zhi)可分成斷續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)和連續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)。斷續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)即(ji)開關(guan)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)。氣(qi)動控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系統(tong)中使用動作頻率較低的(de)開關(guan)式(ON-OFF)的(de)換(huan)向閥(fa)(fa)來控(kong)(kong)(kong)制(zhi)(zhi)(zhi)氣(qi)路的(de)通斷。靠減壓(ya)閥(fa)(fa)來調節(jie)所需要(yao)(yao)(yao)的(de)壓(ya)力(li),靠節(jie)流閥(fa)(fa)來調節(jie)所需要(yao)(yao)(yao)的(de)流量(liang)。這種傳統(tong)的(de)氣(qi)動控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系統(tong)要(yao)(yao)(yao)想(xiang)要(yao)(yao)(yao)有多(duo)個(ge)(ge)輸(shu)出(chu)力(li)和多(duo)個(ge)(ge)運動速度(du),就需要(yao)(yao)(yao)多(duo)個(ge)(ge)減壓(ya)閥(fa)(fa)、節(jie)流閥(fa)(fa)及換(huan)向閥(fa)(fa)。這樣,不僅元件需要(yao)(yao)(yao)多(duo),成本高(gao),構成系統(tong)復雜(za),且(qie)許(xu)多(duo)元件都(dou)需要(yao)(yao)(yao)預先進行人工調節(jie)。電氣(qi)比(bi)例(li)(li)閥(fa)(fa)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)屬(shu)于連續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi),其特點是輸(shu)出(chu)量(liang)隨輸(shu)入量(liang)的(de)變(bian)化而變(bian)化,輸(shu)出(chu)量(liang)與(yu)輸(shu)入量(liang)之間存(cun)在(zai)一(yi)定(ding)的(de)比(bi)例(li)(li)關(guan)系。比(bi)例(li)(li)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)有開環控(kong)(kong)(kong)制(zhi)(zhi)(zhi)和閉環控(kong)(kong)(kong)制(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? |