意大利ATOS比例閥主要體現在以下幾點: 1.驅(qu)動(dong)裝(zhuang)置不(bu)同。比例閥的驅(qu)動(dong)裝(zhuang)置是比例電磁鐵;伺服閥的驅(qu)動(dong)裝(zhuang)置是力馬(ma)達(da)或(huo)力矩馬(ma)達(da); 2.性能(neng)參(can)數不(bu)同。滯環、中位死(si)區(qu)、頻(pin)寬(kuan)、過濾精度等特性不(bu)同,因此應(ying)(ying)用(yong)(yong)場(chang)合不(bu)同,伺服(fu)閥和伺服(fu)比例(li)閥主要(yao)應(ying)(ying)用(yong)(yong)在閉(bi)環控制系統(tong),其它結構的(de)比例(li)閥主要(yao)應(ying)(ying)用(yong)(yong)在開環控系統(tong)及閉(bi)環速度控制系統(tong); - 伺服閥中(zhong)位沒(mei)有(you)死區,比(bi)例閥有(you)中(zhong)位死區;
- 伺服閥的(de)頻(pin)響(響應頻(pin)率)更高(gao),可以高(gao)達(da)200Hz左右(you),比例(li)閥一(yi)般zui高(gao)幾十(shi)Hz;
- 伺服閥對(dui)液(ye)壓(ya)油(you)液(ye)的要(yao)求更(geng)高(gao),需(xu)要(yao)精過濾才行,否則(ze)容易堵塞,比例閥要(yao)求低一些(xie);
3.閥(fa)(fa)(fa)芯(xin)結構及加工精度不同(tong)。比例閥(fa)(fa)(fa)采用(yong)閥(fa)(fa)(fa)芯(xin)+閥(fa)(fa)(fa)體結構,閥(fa)(fa)(fa)體兼作閥(fa)(fa)(fa)套。伺(si)服(fu)閥(fa)(fa)(fa)和伺(si)服(fu)比例閥(fa)(fa)(fa)采用(yong)閥(fa)(fa)(fa)芯(xin)+閥(fa)(fa)(fa)套的(de)結構。 4.中位機能種類不同。比例(li)換向閥具有與普(pu)通換向閥相似的中位機能,而(er)伺服閥中位機能只有O型(Rexroth產品(pin)的E型)。 5.閥(fa)的額定壓(ya)降不同。 電(dian)氣(qi)比例(li)(li)閥(fa)(fa)自動(dong)(dong)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)可(ke)分(fen)成(cheng)斷(duan)續(xu)(xu)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)和連續(xu)(xu)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)。斷(duan)續(xu)(xu)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)即開關(guan)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)。氣(qi)動(dong)(dong)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)系(xi)統中使用(yong)動(dong)(dong)作(zuo)頻率較(jiao)低(di)的(de)(de)開關(guan)式(ON-OFF)的(de)(de)換向閥(fa)(fa)來控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)氣(qi)路的(de)(de)通斷(duan)。靠減(jian)壓閥(fa)(fa)來調節所(suo)需(xu)(xu)要的(de)(de)壓力,靠節流(liu)閥(fa)(fa)來調節所(suo)需(xu)(xu)要的(de)(de)流(liu)量(liang)(liang)。這種(zhong)傳統的(de)(de)氣(qi)動(dong)(dong)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)系(xi)統要想要有多(duo)個(ge)(ge)輸(shu)出力和多(duo)個(ge)(ge)運動(dong)(dong)速度,就需(xu)(xu)要多(duo)個(ge)(ge)減(jian)壓閥(fa)(fa)、節流(liu)閥(fa)(fa)及換向閥(fa)(fa)。這樣,不僅元件(jian)需(xu)(xu)要多(duo),成(cheng)本高,構成(cheng)系(xi)統復(fu)雜,且許多(duo)元件(jian)都需(xu)(xu)要預先進行人工調節。電(dian)氣(qi)比例(li)(li)閥(fa)(fa)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)屬(shu)于連續(xu)(xu)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi),其特(te)點(dian)是輸(shu)出量(liang)(liang)隨輸(shu)入(ru)(ru)量(liang)(liang)的(de)(de)變(bian)化而變(bian)化,輸(shu)出量(liang)(liang)與(yu)輸(shu)入(ru)(ru)量(liang)(liang)之間(jian)存(cun)在一定的(de)(de)比例(li)(li)關(guan)系(xi)。比例(li)(li)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)有開環(huan)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)和閉環(huan)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)之分(fen)。 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? |