意大利ATOS比例閥主要體現在以下幾點： 1.驅動(dong)裝(zhuang)置不同。比(bi)例閥(fa)的(de)(de)驅動(dong)裝(zhuang)置是比(bi)例電磁(ci)鐵(tie)；伺(si)服閥(fa)的(de)(de)驅動(dong)裝(zhuang)置是力(li)馬達或力(li)矩(ju)馬達； 2.性(xing)能參數不同。滯環(huan)(huan)、中位死區、頻寬、過濾精度等特性(xing)不同，因(yin)此應(ying)用(yong)場合不同，伺服(fu)閥和伺服(fu)比例(li)閥主(zhu)要應(ying)用(yong)在(zai)閉(bi)環(huan)(huan)控(kong)制(zhi)系(xi)統(tong)，其它結構的比例(li)閥主(zhu)要應(ying)用(yong)在(zai)開環(huan)(huan)控(kong)系(xi)統(tong)及閉(bi)環(huan)(huan)速(su)度控(kong)制(zhi)系(xi)統(tong)； - 伺服閥中位(wei)沒有(you)死區，比例閥有(you)中位(wei)死區；
- 伺(si)服閥的(de)頻響(xiang)（響(xiang)應(ying)頻率）更高(gao)，可(ke)以高(gao)達200Hz左右，比例(li)閥一般zui高(gao)幾十Hz；
- 伺服閥對(dui)液壓油液的要求更高(gao)，需要精(jing)過濾(lv)才行(xing)，否則(ze)容易(yi)堵塞，比例閥要求低一些(xie)；
3.閥(fa)芯結構及(ji)加工精度不同(tong)。比(bi)例閥(fa)采(cai)用(yong)閥(fa)芯+閥(fa)體(ti)結構，閥(fa)體(ti)兼作(zuo)閥(fa)套(tao)。伺服閥(fa)和伺服比(bi)例閥(fa)采(cai)用(yong)閥(fa)芯+閥(fa)套(tao)的結構。 4.中(zhong)位機能種類(lei)不同。比(bi)例換(huan)向閥(fa)具有與普通換(huan)向閥(fa)相似的中(zhong)位機能，而伺服閥(fa)中(zhong)位機能只有O型（Rexroth產品的E型）。 5.閥(fa)的額(e)定壓降不(bu)同。 電(dian)氣比例(li)閥(fa)(fa)自動(dong)(dong)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)可(ke)分(fen)成(cheng)斷續控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)和連續控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)。斷續控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)即開(kai)(kai)關控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)。氣動(dong)(dong)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)系統中使用動(dong)(dong)作頻率較(jiao)低的開(kai)(kai)關式(ON-OFF)的換向閥(fa)(fa)來控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)氣路的通斷。靠(kao)(kao)減壓(ya)閥(fa)(fa)來調節(jie)所需(xu)要(yao)(yao)的壓(ya)力，靠(kao)(kao)節(jie)流(liu)閥(fa)(fa)來調節(jie)所需(xu)要(yao)(yao)的流(liu)量(liang)(liang)(liang)。這種傳統的氣動(dong)(dong)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)系統要(yao)(yao)想要(yao)(yao)有多(duo)(duo)(duo)個輸(shu)出力和多(duo)(duo)(duo)個運(yun)動(dong)(dong)速(su)度，就需(xu)要(yao)(yao)多(duo)(duo)(duo)個減壓(ya)閥(fa)(fa)、節(jie)流(liu)閥(fa)(fa)及換向閥(fa)(fa)。這樣，不僅元件(jian)需(xu)要(yao)(yao)多(duo)(duo)(duo)，成(cheng)本高，構成(cheng)系統復雜，且(qie)許多(duo)(duo)(duo)元件(jian)都需(xu)要(yao)(yao)預先進行(xing)人工調節(jie)。電(dian)氣比例(li)閥(fa)(fa)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)屬于(yu)連續控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)，其特點是輸(shu)出量(liang)(liang)(liang)隨輸(shu)入(ru)量(liang)(liang)(liang)的變(bian)化(hua)而變(bian)化(hua)，輸(shu)出量(liang)(liang)(liang)與輸(shu)入(ru)量(liang)(liang)(liang)之間存在一定的比例(li)關系。比例(li)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)有開(kai)(kai)環控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)和閉環控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)之分(fen)。 意大利ATOS比例閥型號表： 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? |
