意大利ATOS比例閥主要體現在以下幾點: 1.驅動裝置不同。比(bi)例閥(fa)的驅動裝置是比(bi)例電(dian)磁(ci)鐵(tie);伺服閥(fa)的驅動裝置是力馬達或力矩馬達; 2.性(xing)能(neng)參數不同。滯(zhi)環、中位死區、頻寬、過濾精度等特性(xing)不同,因此應用場合(he)不同,伺服(fu)閥(fa)和伺服(fu)比(bi)例(li)閥(fa)主(zhu)要應用在(zai)閉環控(kong)制系(xi)統,其它結(jie)構(gou)的比(bi)例(li)閥(fa)主(zhu)要應用在(zai)開環控(kong)系(xi)統及閉環速度控(kong)制系(xi)統; - 伺服閥(fa)中(zhong)位(wei)沒有(you)(you)死(si)區,比例閥(fa)有(you)(you)中(zhong)位(wei)死(si)區;
- 伺服閥的頻(pin)(pin)響(xiang)(響(xiang)應頻(pin)(pin)率(lv))更(geng)高,可以高達200Hz左(zuo)右,比(bi)例閥一般(ban)zui高幾十Hz;
- 伺服(fu)閥(fa)對液壓油液的要(yao)求更高,需要(yao)精過(guo)濾才行,否則容易堵塞,比例閥(fa)要(yao)求低一(yi)些;
3.閥(fa)(fa)(fa)(fa)芯結構及加(jia)工精度不同。比例(li)閥(fa)(fa)(fa)(fa)采用閥(fa)(fa)(fa)(fa)芯+閥(fa)(fa)(fa)(fa)體結構,閥(fa)(fa)(fa)(fa)體兼作閥(fa)(fa)(fa)(fa)套(tao)。伺服(fu)閥(fa)(fa)(fa)(fa)和伺服(fu)比例(li)閥(fa)(fa)(fa)(fa)采用閥(fa)(fa)(fa)(fa)芯+閥(fa)(fa)(fa)(fa)套(tao)的結構。 4.中位機能種類(lei)不(bu)同。比例換(huan)向閥具(ju)有與普通換(huan)向閥相似(si)的中位機能,而伺服(fu)閥中位機能只有O型(xing)(Rexroth產品的E型(xing))。 5.閥(fa)的額定(ding)壓降(jiang)不同。 電氣(qi)比例閥(fa)(fa)自動(dong)控(kong)(kong)(kong)(kong)制(zhi)可(ke)分成斷續控(kong)(kong)(kong)(kong)制(zhi)和連(lian)(lian)續控(kong)(kong)(kong)(kong)制(zhi)。斷續控(kong)(kong)(kong)(kong)制(zhi)即開(kai)關(guan)(guan)控(kong)(kong)(kong)(kong)制(zhi)。氣(qi)動(dong)控(kong)(kong)(kong)(kong)制(zhi)系統中使用動(dong)作(zuo)頻率較低的(de)開(kai)關(guan)(guan)式(ON-OFF)的(de)換向閥(fa)(fa)來控(kong)(kong)(kong)(kong)制(zhi)氣(qi)路的(de)通斷。靠減壓(ya)閥(fa)(fa)來調(diao)節(jie)所需要(yao)(yao)(yao)(yao)的(de)壓(ya)力(li),靠節(jie)流(liu)閥(fa)(fa)來調(diao)節(jie)所需要(yao)(yao)(yao)(yao)的(de)流(liu)量(liang)(liang)(liang)。這(zhe)種傳統的(de)氣(qi)動(dong)控(kong)(kong)(kong)(kong)制(zhi)系統要(yao)(yao)(yao)(yao)想要(yao)(yao)(yao)(yao)有多(duo)(duo)個輸(shu)出力(li)和多(duo)(duo)個運(yun)動(dong)速(su)度,就需要(yao)(yao)(yao)(yao)多(duo)(duo)個減壓(ya)閥(fa)(fa)、節(jie)流(liu)閥(fa)(fa)及換向閥(fa)(fa)。這(zhe)樣,不僅元件需要(yao)(yao)(yao)(yao)多(duo)(duo),成本高,構成系統復雜(za),且許多(duo)(duo)元件都需要(yao)(yao)(yao)(yao)預(yu)先(xian)進行人工(gong)調(diao)節(jie)。電氣(qi)比例閥(fa)(fa)控(kong)(kong)(kong)(kong)制(zhi)屬于連(lian)(lian)續控(kong)(kong)(kong)(kong)制(zhi),其特點是(shi)輸(shu)出量(liang)(liang)(liang)隨輸(shu)入量(liang)(liang)(liang)的(de)變化(hua)而變化(hua),輸(shu)出量(liang)(liang)(liang)與輸(shu)入量(liang)(liang)(liang)之間存在一定的(de)比例關(guan)(guan)系。比例控(kong)(kong)(kong)(kong)制(zhi)有開(kai)環(huan)控(kong)(kong)(kong)(kong)制(zhi)和閉環(huan)控(kong)(kong)(kong)(kong)制(zhi)之分。 意大利ATOS比例閥型(xing)號表: LIMZA-A-1/180/M 20 LIMZA-A-3/180/M 40 LIMZO-A-3/210 LIMZO-A-4/210 LIMZO-A-5/315/P 30 LIMZO-AE-4/315 10 LIMZO-TER-4/210 50 LIMZO-TER-4/210/I LIQV-2 20 LIQV-2/K LIQZO-A-252S4 LIQZO-L-252L4 50 LIQZO-L-322L4 50 LIQZO-LE-402L4 50 LIQZO-LE-502L4 50 LIQZO-LE-632L4 51 LIQZO-T-252L4 LIQZO-T-252L4 50 /PE LIQZO-T-322L4 50 LIQZO-T-402L4 LIQZO-TE-322L4 50 LIRA-1/100 20 LIRA-1/210 20 LIRA-2/210/V 20 LIRA-3/100 LIRA-4/210/V 11 LIRZO-A-1/210 QVHZO-A-06/12 20 QVHZO-A-06/18 QVHZO-A-06/3 QVHZO-A-06/36 QVHZO-A-06/45 QVHZO-AE-06/3/I 10 QVHZO-AE-06/45/I QVHZO-T-06/12 31 QVHZO-T-06/3 31/WG QVHZO-TE-06/18 40 QVHZO-TE-06/18/I 40 QVHZO-TE-06/3 40 QVKMZOR-A-10/90/210/18 QVKZOR-A-10/65 QVKZOR-AE-10/90 10 QVKZOR-AES-BC-10/65 10? |