意大利ATOS比例閥主要體現在以下幾點: 1.驅動(dong)(dong)裝置不同(tong)。比(bi)例閥的驅動(dong)(dong)裝置是比(bi)例電磁鐵(tie);伺服閥的驅動(dong)(dong)裝置是力(li)馬達(da)或(huo)力(li)矩馬達(da); 2.性能(neng)參數不同(tong)。滯環(huan)(huan)、中(zhong)位死區、頻寬、過濾精(jing)度等特性不同(tong),因此應用場合(he)不同(tong),伺服(fu)閥和伺服(fu)比例(li)閥主(zhu)要應用在閉(bi)環(huan)(huan)控制系(xi)統,其它結(jie)構(gou)的比例(li)閥主(zhu)要應用在開(kai)環(huan)(huan)控系(xi)統及(ji)閉(bi)環(huan)(huan)速度控制系(xi)統; - 伺服閥(fa)中位沒(mei)有(you)死區,比例閥(fa)有(you)中位死區;
- 伺服閥的頻響(響應頻率)更高,可以高達200Hz左(zuo)右(you),比例閥一般zui高幾十Hz;
- 伺服閥(fa)對液壓油液的要求更高,需要精過濾才行,否則容易(yi)堵塞,比(bi)例閥(fa)要求低一些;
3.閥(fa)(fa)(fa)芯(xin)(xin)結構(gou)及加工精度不(bu)同。比(bi)例閥(fa)(fa)(fa)采(cai)(cai)用(yong)閥(fa)(fa)(fa)芯(xin)(xin)+閥(fa)(fa)(fa)體結構(gou),閥(fa)(fa)(fa)體兼(jian)作閥(fa)(fa)(fa)套。伺(si)服(fu)閥(fa)(fa)(fa)和(he)伺(si)服(fu)比(bi)例閥(fa)(fa)(fa)采(cai)(cai)用(yong)閥(fa)(fa)(fa)芯(xin)(xin)+閥(fa)(fa)(fa)套的結構(gou)。 4.中位機能(neng)種類(lei)不同。比例(li)換(huan)向(xiang)閥具有與普通換(huan)向(xiang)閥相似的中位機能(neng),而伺(si)服閥中位機能(neng)只有O型(xing)(Rexroth產品的E型(xing))。 5.閥(fa)的額定壓降不同(tong)。 電(dian)氣(qi)比例(li)閥(fa)(fa)自動(dong)(dong)控(kong)(kong)制(zhi)(zhi)(zhi)可分成(cheng)斷續控(kong)(kong)制(zhi)(zhi)(zhi)和(he)連(lian)續控(kong)(kong)制(zhi)(zhi)(zhi)。斷續控(kong)(kong)制(zhi)(zhi)(zhi)即開關(guan)(guan)控(kong)(kong)制(zhi)(zhi)(zhi)。氣(qi)動(dong)(dong)控(kong)(kong)制(zhi)(zhi)(zhi)系統中使(shi)用動(dong)(dong)作頻率較低的(de)開關(guan)(guan)式(ON-OFF)的(de)換向閥(fa)(fa)來(lai)(lai)控(kong)(kong)制(zhi)(zhi)(zhi)氣(qi)路的(de)通斷。靠減壓(ya)閥(fa)(fa)來(lai)(lai)調節所需(xu)(xu)要的(de)壓(ya)力,靠節流閥(fa)(fa)來(lai)(lai)調節所需(xu)(xu)要的(de)流量(liang)。這種傳統的(de)氣(qi)動(dong)(dong)控(kong)(kong)制(zhi)(zhi)(zhi)系統要想要有多(duo)個(ge)輸出力和(he)多(duo)個(ge)運動(dong)(dong)速(su)度,就需(xu)(xu)要多(duo)個(ge)減壓(ya)閥(fa)(fa)、節流閥(fa)(fa)及換向閥(fa)(fa)。這樣,不僅(jin)元件需(xu)(xu)要多(duo),成(cheng)本高,構成(cheng)系統復雜,且(qie)許多(duo)元件都需(xu)(xu)要預(yu)先(xian)進行人工(gong)調節。電(dian)氣(qi)比例(li)閥(fa)(fa)控(kong)(kong)制(zhi)(zhi)(zhi)屬(shu)于連(lian)續控(kong)(kong)制(zhi)(zhi)(zhi),其特點(dian)是輸出量(liang)隨輸入量(liang)的(de)變(bian)化而變(bian)化,輸出量(liang)與輸入量(liang)之(zhi)間存在一定的(de)比例(li)關(guan)(guan)系。比例(li)控(kong)(kong)制(zhi)(zhi)(zhi)有開環控(kong)(kong)制(zhi)(zhi)(zhi)和(he)閉環控(kong)(kong)制(zhi)(zhi)(zhi)之(zhi)分。 意大利ATOS比例閥型號表: 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? |