意大利ATOS比例閥主要體現在以下幾點: 1.驅(qu)動裝(zhuang)(zhuang)置不同。比例閥的驅(qu)動裝(zhuang)(zhuang)置是比例電磁鐵(tie);伺服閥的驅(qu)動裝(zhuang)(zhuang)置是力馬達或(huo)力矩馬達; 2.性(xing)能參數不(bu)同(tong)。滯環(huan)、中(zhong)位死區、頻寬、過濾精度等(deng)特性(xing)不(bu)同(tong),因此應(ying)用(yong)(yong)場合不(bu)同(tong),伺(si)服閥和伺(si)服比例閥主要應(ying)用(yong)(yong)在閉(bi)(bi)環(huan)控制系(xi)統,其它結構(gou)的比例閥主要應(ying)用(yong)(yong)在開環(huan)控系(xi)統及閉(bi)(bi)環(huan)速度控制系(xi)統; - 伺服(fu)閥中位(wei)沒有(you)死(si)(si)區(qu),比例閥有(you)中位(wei)死(si)(si)區(qu);
- 伺服閥的頻(pin)響(響應頻(pin)率)更高,可以高達200Hz左(zuo)右,比(bi)例(li)閥一般(ban)zui高幾十Hz;
- 伺(si)服閥對(dui)液壓油(you)液的要(yao)求(qiu)更高,需要(yao)精過(guo)濾才行,否則容(rong)易堵塞(sai),比例(li)閥要(yao)求(qiu)低一些;
3.閥(fa)(fa)芯結構(gou)(gou)及加(jia)工(gong)精(jing)度不同。比例閥(fa)(fa)采(cai)用(yong)閥(fa)(fa)芯+閥(fa)(fa)體結構(gou)(gou),閥(fa)(fa)體兼作閥(fa)(fa)套(tao)。伺(si)服閥(fa)(fa)和伺(si)服比例閥(fa)(fa)采(cai)用(yong)閥(fa)(fa)芯+閥(fa)(fa)套(tao)的結構(gou)(gou)。 4.中(zhong)(zhong)位(wei)機(ji)能種類不同。比例(li)換(huan)向(xiang)(xiang)閥具有(you)與普通換(huan)向(xiang)(xiang)閥相(xiang)似的(de)中(zhong)(zhong)位(wei)機(ji)能,而伺服(fu)閥中(zhong)(zhong)位(wei)機(ji)能只有(you)O型(xing)(Rexroth產(chan)品的(de)E型(xing))。 5.閥的額(e)定壓(ya)降不同。 電氣(qi)(qi)比(bi)例閥(fa)自動(dong)控(kong)制(zhi)可分成斷(duan)續控(kong)制(zhi)和(he)連(lian)續控(kong)制(zhi)。斷(duan)續控(kong)制(zhi)即開(kai)關控(kong)制(zhi)。氣(qi)(qi)動(dong)控(kong)制(zhi)系(xi)統(tong)(tong)中使用動(dong)作頻率較(jiao)低的(de)(de)(de)開(kai)關式(ON-OFF)的(de)(de)(de)換向(xiang)閥(fa)來(lai)控(kong)制(zhi)氣(qi)(qi)路的(de)(de)(de)通(tong)斷(duan)。靠減(jian)壓閥(fa)來(lai)調(diao)節所(suo)需(xu)要(yao)(yao)的(de)(de)(de)壓力,靠節流(liu)閥(fa)來(lai)調(diao)節所(suo)需(xu)要(yao)(yao)的(de)(de)(de)流(liu)量(liang)(liang)。這種傳統(tong)(tong)的(de)(de)(de)氣(qi)(qi)動(dong)控(kong)制(zhi)系(xi)統(tong)(tong)要(yao)(yao)想(xiang)要(yao)(yao)有(you)多(duo)個(ge)輸出(chu)力和(he)多(duo)個(ge)運動(dong)速度,就需(xu)要(yao)(yao)多(duo)個(ge)減(jian)壓閥(fa)、節流(liu)閥(fa)及(ji)換向(xiang)閥(fa)。這樣,不僅(jin)元(yuan)件(jian)需(xu)要(yao)(yao)多(duo),成本(ben)高,構成系(xi)統(tong)(tong)復(fu)雜,且(qie)許多(duo)元(yuan)件(jian)都需(xu)要(yao)(yao)預(yu)先進行人工調(diao)節。電氣(qi)(qi)比(bi)例閥(fa)控(kong)制(zhi)屬于(yu)連(lian)續控(kong)制(zhi),其特點是輸出(chu)量(liang)(liang)隨輸入量(liang)(liang)的(de)(de)(de)變化而變化,輸出(chu)量(liang)(liang)與輸入量(liang)(liang)之間存在(zai)一定的(de)(de)(de)比(bi)例關系(xi)。比(bi)例控(kong)制(zhi)有(you)開(kai)環控(kong)制(zhi)和(he)閉環控(kong)制(zhi)之分。 意大利ATOS比例閥型號(hao)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? |