意大利ATOS比例閥主要體現在以下幾點: 1.驅(qu)(qu)動裝置(zhi)不同(tong)。比(bi)例閥(fa)的(de)驅(qu)(qu)動裝置(zhi)是比(bi)例電磁鐵;伺服閥(fa)的(de)驅(qu)(qu)動裝置(zhi)是力馬(ma)(ma)達或力矩(ju)馬(ma)(ma)達; 2.性能(neng)參數不(bu)同(tong)。滯環、中位死區、頻(pin)寬、過濾精度(du)等特性不(bu)同(tong),因(yin)此應(ying)用場(chang)合不(bu)同(tong),伺(si)服閥(fa)和伺(si)服比例閥(fa)主要應(ying)用在閉(bi)環控(kong)制系統,其它結(jie)構的比例閥(fa)主要應(ying)用在開(kai)環控(kong)系統及閉(bi)環速度(du)控(kong)制系統; - 伺服閥中位沒有死區,比例閥有中位死區;
- 伺(si)服閥(fa)的(de)頻響(響應頻率)更高(gao),可以高(gao)達200Hz左右,比例(li)閥(fa)一般(ban)zui高(gao)幾十Hz;
- 伺服閥對液(ye)壓油液(ye)的要(yao)(yao)求更高,需(xu)要(yao)(yao)精過(guo)濾(lv)才(cai)行,否則容易堵塞(sai),比例閥要(yao)(yao)求低一些;
3.閥(fa)(fa)芯(xin)結(jie)構及加(jia)工精度不同。比(bi)(bi)例閥(fa)(fa)采用閥(fa)(fa)芯(xin)+閥(fa)(fa)體結(jie)構,閥(fa)(fa)體兼(jian)作(zuo)閥(fa)(fa)套。伺(si)服閥(fa)(fa)和伺(si)服比(bi)(bi)例閥(fa)(fa)采用閥(fa)(fa)芯(xin)+閥(fa)(fa)套的結(jie)構。 4.中位(wei)(wei)機(ji)能(neng)種類(lei)不(bu)同(tong)。比例換向閥具(ju)有(you)與普(pu)通換向閥相似的中位(wei)(wei)機(ji)能(neng),而伺服閥中位(wei)(wei)機(ji)能(neng)只有(you)O型(xing)(Rexroth產品(pin)的E型(xing))。 5.閥(fa)的額定壓降不同。 電氣(qi)(qi)比(bi)例(li)(li)(li)閥自動控(kong)(kong)(kong)制(zhi)(zhi)(zhi)可分成(cheng)斷(duan)續控(kong)(kong)(kong)制(zhi)(zhi)(zhi)和連(lian)續控(kong)(kong)(kong)制(zhi)(zhi)(zhi)。斷(duan)續控(kong)(kong)(kong)制(zhi)(zhi)(zhi)即(ji)開關控(kong)(kong)(kong)制(zhi)(zhi)(zhi)。氣(qi)(qi)動控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)統中使用動作頻率較低的(de)開關式(ON-OFF)的(de)換(huan)(huan)向閥來(lai)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)氣(qi)(qi)路的(de)通斷(duan)。靠(kao)(kao)減(jian)壓閥來(lai)調(diao)節所(suo)需(xu)要(yao)的(de)壓力(li),靠(kao)(kao)節流(liu)閥來(lai)調(diao)節所(suo)需(xu)要(yao)的(de)流(liu)量(liang)。這種(zhong)傳統的(de)氣(qi)(qi)動控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)統要(yao)想要(yao)有多(duo)(duo)個輸(shu)出(chu)力(li)和多(duo)(duo)個運動速度(du),就需(xu)要(yao)多(duo)(duo)個減(jian)壓閥、節流(liu)閥及換(huan)(huan)向閥。這樣(yang),不僅元(yuan)件(jian)需(xu)要(yao)多(duo)(duo),成(cheng)本(ben)高,構成(cheng)系(xi)統復雜,且許多(duo)(duo)元(yuan)件(jian)都需(xu)要(yao)預(yu)先(xian)進(jin)行人工調(diao)節。電氣(qi)(qi)比(bi)例(li)(li)(li)閥控(kong)(kong)(kong)制(zhi)(zhi)(zhi)屬于連(lian)續控(kong)(kong)(kong)制(zhi)(zhi)(zhi),其特點是輸(shu)出(chu)量(liang)隨輸(shu)入(ru)量(liang)的(de)變化而(er)變化,輸(shu)出(chu)量(liang)與輸(shu)入(ru)量(liang)之間(jian)存(cun)在一定的(de)比(bi)例(li)(li)(li)關系(xi)。比(bi)例(li)(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: QVHZO-A-0612 20 QVHZO-A-0618 QVHZO-A-063 QVHZO-A-0636 QVHZO-A-0645 QVHZO-AE-063I 10 QVHZO-AE-0645I QVHZO-T-0612 31 QVHZO-T-063 31WG QVHZO-TE-0618 40 QVHZO-TE-0618I 40 QVHZO-TE-063 40 QVKZOR-A-1065 QVKZOR-AE-1090 10 QVKZOR-AES-BC-1065 10 QVKZOR-T-1065 QVKZOR-TE-1065 QVKZOR-TE-1065F 20 QVZO-A-20210-S4 QVZO-A-202-L418V 20 QVZO-A-202-S4 30 QVZO-A-202-S4V QVZO-A-203-S4 30 |