意大利ATOS比例閥主要體現在以下幾點: 1.驅(qu)(qu)動裝(zhuang)置(zhi)不同。比(bi)例(li)(li)閥的驅(qu)(qu)動裝(zhuang)置(zhi)是比(bi)例(li)(li)電磁鐵;伺(si)服(fu)閥的驅(qu)(qu)動裝(zhuang)置(zhi)是力(li)馬達(da)或(huo)力(li)矩馬達(da); 2.性(xing)能參數不(bu)同。滯環、中位死區、頻(pin)寬、過濾(lv)精度等(deng)特性(xing)不(bu)同,因此應用場合不(bu)同,伺服閥(fa)和伺服比例(li)閥(fa)主要(yao)應用在(zai)閉環控制系統(tong),其它結構的比例(li)閥(fa)主要(yao)應用在(zai)開環控系統(tong)及閉環速度控制系統(tong); - 伺服(fu)閥(fa)中(zhong)位沒有死(si)區,比例(li)閥(fa)有中(zhong)位死(si)區;
- 伺服閥的頻響(xiang)(響(xiang)應頻率)更高,可以(yi)高達(da)200Hz左右,比(bi)例閥一般zui高幾十Hz;
- 伺服閥(fa)對液壓(ya)油液的要求更高(gao),需要精(jing)過濾才(cai)行,否則容易堵塞,比例閥(fa)要求低一(yi)些;
3.閥(fa)(fa)芯(xin)(xin)結構及(ji)加(jia)工精度不同。比例(li)閥(fa)(fa)采用(yong)閥(fa)(fa)芯(xin)(xin)+閥(fa)(fa)體(ti)結構,閥(fa)(fa)體(ti)兼作閥(fa)(fa)套。伺服閥(fa)(fa)和伺服比例(li)閥(fa)(fa)采用(yong)閥(fa)(fa)芯(xin)(xin)+閥(fa)(fa)套的結構。 4.中(zhong)位機能種(zhong)類不同。比例換向閥具(ju)有與普(pu)通換向閥相似的中(zhong)位機能,而伺服閥中(zhong)位機能只有O型(Rexroth產(chan)品的E型)。 5.閥的額(e)定壓降不同。 電(dian)氣比例(li)(li)(li)閥(fa)(fa)自(zi)動(dong)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)可(ke)分(fen)成(cheng)斷(duan)續(xu)(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)和連(lian)續(xu)(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)。斷(duan)續(xu)(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)即開(kai)關控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)。氣動(dong)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)系(xi)統中使(shi)用動(dong)作頻率較(jiao)低的(de)開(kai)關式(shi)(ON-OFF)的(de)換向閥(fa)(fa)來控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)氣路的(de)通斷(duan)。靠(kao)減壓(ya)閥(fa)(fa)來調節所需要的(de)壓(ya)力,靠(kao)節流閥(fa)(fa)來調節所需要的(de)流量(liang)(liang)。這種(zhong)傳統的(de)氣動(dong)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)系(xi)統要想(xiang)要有(you)多(duo)(duo)個輸出力和多(duo)(duo)個運動(dong)速度,就需要多(duo)(duo)個減壓(ya)閥(fa)(fa)、節流閥(fa)(fa)及換向閥(fa)(fa)。這樣,不僅元件需要多(duo)(duo),成(cheng)本高,構成(cheng)系(xi)統復雜,且許(xu)多(duo)(duo)元件都需要預先(xian)進(jin)行(xing)人工調節。電(dian)氣比例(li)(li)(li)閥(fa)(fa)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)屬(shu)于連(lian)續(xu)(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi),其特點是(shi)輸出量(liang)(liang)隨(sui)輸入量(liang)(liang)的(de)變化而變化,輸出量(liang)(liang)與(yu)輸入量(liang)(liang)之(zhi)間存(cun)在一定的(de)比例(li)(li)(li)關系(xi)。比例(li)(li)(li)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)有(you)開(kai)環(huan)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)和閉(bi)環(huan)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)之(zhi)分(fen)。 意大利ATOS比例閥型號表: LEQZO-A-162S4 LEQZO-A-252L4 LEQZO-A-252S4 LIQZO-LE-252L4 LIQZO-LE-253L4 LIQZO-LE-253L4/Q LIQZO-LE-322L4 LIQZO-LE-322L4/F LIQZO-LE-322L4/Q LIQZO-LE-402L4 LIQZO-LE-403-L4 LIQZO-LE-403-L4/Q LIQZO-LE-502L4 LIQZO-LE-503L4 LIQZO-LE-632L4 LIQZO-LE-632L4/Q LIQZO-LE-633L4 LIQZO-LE-803-L4 LIQZO-LE-803-L4/F LIQZO-LES-BP-502L4/Z LIQZO-LES-PS-162L4 LIQZO-LES-PS-162L4/Z LIQZO-T-402L4 LIQZO-T-502L4 LIQZO-TE-162L4 LIQZO-TE-252L4 LIQZO-TE-252L4/I LIQZO-TE-322L4 LIQZO-TE-322L4/F LIQZO-TE-402L4 LIQZO-TE-502L4 LIQZO-TES-PS-162L4 |