意大利ATOS比例閥主要體現在以下幾點： 1.驅動裝(zhuang)置(zhi)不同(tong)。比例(li)閥(fa)的(de)驅動裝(zhuang)置(zhi)是(shi)比例(li)電(dian)磁鐵；伺服閥(fa)的(de)驅動裝(zhuang)置(zhi)是(shi)力馬達(da)或力矩馬達(da)； 2.性(xing)能參數不同(tong)(tong)。滯環、中位死區(qu)、頻寬、過濾精(jing)度(du)等特性(xing)不同(tong)(tong)，因此(ci)應(ying)用場合不同(tong)(tong)，伺服閥和伺服比例閥主要應(ying)用在閉環控(kong)(kong)制系(xi)統，其它結構的比例閥主要應(ying)用在開環控(kong)(kong)系(xi)統及閉環速度(du)控(kong)(kong)制系(xi)統； - 伺服閥中位沒有死(si)區，比例(li)閥有中位死(si)區；
- 伺服閥的(de)頻響（響應(ying)頻率）更高，可(ke)以高達200Hz左右(you)，比例閥一般zui高幾十(shi)Hz；
- 伺服閥對液壓油液的要(yao)求更高，需要(yao)精過濾才行，否則容易堵(du)塞，比例閥要(yao)求低(di)一些(xie)；
3.閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)芯(xin)結構及加工精度不同(tong)。比例(li)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)采用閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)芯(xin)+閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)體結構，閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)體兼作閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)套(tao)。伺服閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)和伺服比例(li)閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)采用閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)芯(xin)+閥(fa)(fa)(fa)(fa)(fa)(fa)(fa)套(tao)的結構。 4.中(zhong)位(wei)機(ji)能(neng)種類不(bu)同。比例換(huan)向閥具有與普(pu)通(tong)換(huan)向閥相似(si)的(de)中(zhong)位(wei)機(ji)能(neng)，而伺服閥中(zhong)位(wei)機(ji)能(neng)只有O型（Rexroth產品的(de)E型）。 5.閥的額定(ding)壓降不同。 電(dian)氣比(bi)(bi)例閥(fa)自動(dong)(dong)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)可(ke)分成(cheng)斷續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)和(he)(he)連續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)。斷續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)即開關(guan)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)。氣動(dong)(dong)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)(xi)統(tong)(tong)中使用動(dong)(dong)作頻率較(jiao)低的開關(guan)式(ON-OFF)的換(huan)向(xiang)閥(fa)來控(kong)(kong)(kong)制(zhi)(zhi)(zhi)氣路的通斷。靠(kao)減壓閥(fa)來調(diao)節(jie)(jie)(jie)所需要(yao)(yao)(yao)的壓力，靠(kao)節(jie)(jie)(jie)流(liu)(liu)閥(fa)來調(diao)節(jie)(jie)(jie)所需要(yao)(yao)(yao)的流(liu)(liu)量。這(zhe)種傳統(tong)(tong)的氣動(dong)(dong)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)(xi)統(tong)(tong)要(yao)(yao)(yao)想要(yao)(yao)(yao)有多(duo)(duo)個(ge)(ge)輸(shu)(shu)出(chu)力和(he)(he)多(duo)(duo)個(ge)(ge)運動(dong)(dong)速度，就需要(yao)(yao)(yao)多(duo)(duo)個(ge)(ge)減壓閥(fa)、節(jie)(jie)(jie)流(liu)(liu)閥(fa)及換(huan)向(xiang)閥(fa)。這(zhe)樣(yang)，不僅元件需要(yao)(yao)(yao)多(duo)(duo)，成(cheng)本高(gao)，構(gou)成(cheng)系(xi)(xi)統(tong)(tong)復雜，且許多(duo)(duo)元件都(dou)需要(yao)(yao)(yao)預(yu)先進行人工調(diao)節(jie)(jie)(jie)。電(dian)氣比(bi)(bi)例閥(fa)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)屬于(yu)連續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)，其特點是(shi)輸(shu)(shu)出(chu)量隨輸(shu)(shu)入量的變(bian)化而變(bian)化，輸(shu)(shu)出(chu)量與(yu)輸(shu)(shu)入量之(zhi)間(jian)存在(zai)一定的比(bi)(bi)例關(guan)系(xi)(xi)。比(bi)(bi)例控(kong)(kong)(kong)制(zhi)(zhi)(zhi)有開環控(kong)(kong)(kong)制(zhi)(zhi)(zhi)和(he)(he)閉環控(kong)(kong)(kong)制(zhi)(zhi)(zhi)之(zhi)分。 意大利ATOS比例閥型號表(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 |
