意大利ATOS比例閥主要體現在以下幾點: 1.驅動裝置(zhi)不同。比例(li)閥(fa)的驅動裝置(zhi)是比例(li)電磁鐵;伺服閥(fa)的驅動裝置(zhi)是力馬達(da)或力矩馬達(da); 2.性能參數(shu)不(bu)同(tong)。滯(zhi)環(huan)(huan)、中位死區(qu)、頻寬、過濾精度等特性不(bu)同(tong),因此應用(yong)(yong)場合不(bu)同(tong),伺服(fu)(fu)閥(fa)和伺服(fu)(fu)比(bi)例閥(fa)主要(yao)應用(yong)(yong)在閉環(huan)(huan)控制(zhi)系統(tong),其它(ta)結構的比(bi)例閥(fa)主要(yao)應用(yong)(yong)在開環(huan)(huan)控系統(tong)及(ji)閉環(huan)(huan)速度控制(zhi)系統(tong); - 伺服閥中(zhong)位沒有(you)死區,比(bi)例閥有(you)中(zhong)位死區;
- 伺(si)服閥的頻響(響應(ying)頻率)更(geng)高(gao),可以高(gao)達200Hz左(zuo)右,比(bi)例閥一般zui高(gao)幾(ji)十Hz;
- 伺服(fu)閥對液(ye)壓油液(ye)的要求更高,需要精過(guo)濾才(cai)行,否則容易堵塞,比例閥要求低一些;
3.閥(fa)(fa)芯結(jie)(jie)構及加工精度不同。比例閥(fa)(fa)采(cai)用閥(fa)(fa)芯+閥(fa)(fa)體結(jie)(jie)構,閥(fa)(fa)體兼(jian)作閥(fa)(fa)套。伺(si)服(fu)閥(fa)(fa)和(he)伺(si)服(fu)比例閥(fa)(fa)采(cai)用閥(fa)(fa)芯+閥(fa)(fa)套的結(jie)(jie)構。 4.中位機能種類不同。比(bi)例(li)換向閥具有與普通換向閥相似的(de)中位機能,而伺服(fu)閥中位機能只有O型(Rexroth產品的(de)E型)。 5.閥(fa)的額定壓降不同。 電(dian)氣(qi)比例閥(fa)(fa)自動(dong)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)可分成斷(duan)(duan)續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)和連(lian)續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)。斷(duan)(duan)續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)即開關控(kong)(kong)(kong)制(zhi)(zhi)(zhi)。氣(qi)動(dong)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)(xi)統(tong)中使用(yong)動(dong)作頻(pin)率較低的(de)(de)開關式(ON-OFF)的(de)(de)換向閥(fa)(fa)來(lai)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)氣(qi)路的(de)(de)通斷(duan)(duan)。靠減(jian)(jian)壓(ya)閥(fa)(fa)來(lai)調節(jie)所(suo)需要的(de)(de)壓(ya)力,靠節(jie)流(liu)閥(fa)(fa)來(lai)調節(jie)所(suo)需要的(de)(de)流(liu)量(liang)。這(zhe)種傳統(tong)的(de)(de)氣(qi)動(dong)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)(xi)統(tong)要想要有(you)多(duo)(duo)個(ge)輸(shu)(shu)(shu)出(chu)力和多(duo)(duo)個(ge)運動(dong)速度,就需要多(duo)(duo)個(ge)減(jian)(jian)壓(ya)閥(fa)(fa)、節(jie)流(liu)閥(fa)(fa)及換向閥(fa)(fa)。這(zhe)樣,不(bu)僅(jin)元件需要多(duo)(duo),成本高,構成系(xi)(xi)統(tong)復雜,且許多(duo)(duo)元件都需要預(yu)先進行人工調節(jie)。電(dian)氣(qi)比例閥(fa)(fa)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)屬于(yu)連(lian)續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi),其特(te)點是(shi)輸(shu)(shu)(shu)出(chu)量(liang)隨輸(shu)(shu)(shu)入量(liang)的(de)(de)變(bian)化而變(bian)化,輸(shu)(shu)(shu)出(chu)量(liang)與輸(shu)(shu)(shu)入量(liang)之間存(cun)在一定的(de)(de)比例關系(xi)(xi)。比例控(kong)(kong)(kong)制(zhi)(zhi)(zhi)有(you)開環(huan)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)和閉環(huan)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)之分。 意大利ATOS比例閥型號(hao)表(biao): 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 |