意大利ATOS比例閥主要體現在以下幾點: 1.驅(qu)動(dong)裝置(zhi)不同。比例閥(fa)的驅(qu)動(dong)裝置(zhi)是比例電磁(ci)鐵;伺(si)服閥(fa)的驅(qu)動(dong)裝置(zhi)是力馬達或力矩馬達; 2.性能參數不(bu)(bu)同(tong)。滯環(huan)、中(zhong)位死區、頻寬、過濾精度等特性不(bu)(bu)同(tong),因此(ci)應用場合不(bu)(bu)同(tong),伺服(fu)閥(fa)和伺服(fu)比例閥(fa)主要(yao)應用在閉環(huan)控制(zhi)系統(tong),其它(ta)結構的比例閥(fa)主要(yao)應用在開(kai)環(huan)控系統(tong)及閉環(huan)速度控制(zhi)系統(tong); - 伺服閥中位沒有死區,比例閥有中位死區;
- 伺服(fu)閥的頻(pin)響(響應頻(pin)率)更高,可以高達(da)200Hz左(zuo)右,比例閥一(yi)般zui高幾十Hz;
- 伺服閥(fa)對液壓(ya)油液的要(yao)求(qiu)更高,需要(yao)精過濾(lv)才(cai)行,否則容(rong)易堵塞(sai),比例閥(fa)要(yao)求(qiu)低一些;
3.閥芯結(jie)構及加(jia)工精度不同。比(bi)例閥采用閥芯+閥體(ti)結(jie)構,閥體(ti)兼作閥套(tao)。伺(si)(si)服閥和(he)伺(si)(si)服比(bi)例閥采用閥芯+閥套(tao)的(de)結(jie)構。 4.中位機(ji)能(neng)種類不(bu)同。比例換向(xiang)閥(fa)具(ju)有與普通換向(xiang)閥(fa)相似的中位機(ji)能(neng),而伺服閥(fa)中位機(ji)能(neng)只(zhi)有O型(xing)(Rexroth產(chan)品的E型(xing))。 5.閥的額定壓(ya)降不(bu)同。 電(dian)氣(qi)比(bi)例(li)(li)(li)閥(fa)(fa)(fa)(fa)自動(dong)控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)可分成(cheng)斷(duan)(duan)(duan)續控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)和(he)連(lian)續控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)。斷(duan)(duan)(duan)續控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)即開(kai)關控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)。氣(qi)動(dong)控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)系(xi)(xi)統(tong)中使用動(dong)作頻(pin)率較低(di)的開(kai)關式(ON-OFF)的換向閥(fa)(fa)(fa)(fa)來(lai)控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)氣(qi)路的通斷(duan)(duan)(duan)。靠減壓(ya)閥(fa)(fa)(fa)(fa)來(lai)調(diao)節(jie)(jie)所(suo)(suo)需(xu)要(yao)(yao)的壓(ya)力,靠節(jie)(jie)流(liu)閥(fa)(fa)(fa)(fa)來(lai)調(diao)節(jie)(jie)所(suo)(suo)需(xu)要(yao)(yao)的流(liu)量(liang)。這種傳(chuan)統(tong)的氣(qi)動(dong)控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)系(xi)(xi)統(tong)要(yao)(yao)想要(yao)(yao)有(you)多個(ge)輸(shu)出力和(he)多個(ge)運動(dong)速度,就需(xu)要(yao)(yao)多個(ge)減壓(ya)閥(fa)(fa)(fa)(fa)、節(jie)(jie)流(liu)閥(fa)(fa)(fa)(fa)及換向閥(fa)(fa)(fa)(fa)。這樣,不僅元件需(xu)要(yao)(yao)多,成(cheng)本高,構成(cheng)系(xi)(xi)統(tong)復雜,且(qie)許多元件都需(xu)要(yao)(yao)預先進行人工調(diao)節(jie)(jie)。電(dian)氣(qi)比(bi)例(li)(li)(li)閥(fa)(fa)(fa)(fa)控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)屬于連(lian)續控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi),其特點(dian)是輸(shu)出量(liang)隨輸(shu)入量(liang)的變化(hua)而變化(hua),輸(shu)出量(liang)與輸(shu)入量(liang)之間存在一定的比(bi)例(li)(li)(li)關系(xi)(xi)。比(bi)例(li)(li)(li)控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)有(you)開(kai)環控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)和(he)閉環控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)之分。 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 |