意大利ATOS比例閥主要體現在以下幾點： 1.驅(qu)動裝(zhuang)置不同。比例閥的驅(qu)動裝(zhuang)置是(shi)比例電(dian)磁鐵；伺服(fu)閥的驅(qu)動裝(zhuang)置是(shi)力馬達(da)或力矩馬達(da)； 2.性(xing)能(neng)參數不同。滯環(huan)、中位(wei)死區、頻(pin)寬、過濾精度(du)等特性(xing)不同，因此應用場合不同，伺服(fu)閥和伺服(fu)比例閥主要應用在閉(bi)環(huan)控制系統，其它結構的比例閥主要應用在開環(huan)控系統及閉(bi)環(huan)速度(du)控制系統； - 伺(si)服閥(fa)中(zhong)位沒有(you)死區(qu)，比例(li)閥(fa)有(you)中(zhong)位死區(qu)；
- 伺服閥的頻(pin)響（響應頻(pin)率）更(geng)高，可以高達200Hz左右(you)，比例閥一般zui高幾十Hz；
- 伺服閥(fa)對(dui)液壓(ya)油液的要(yao)求更高，需要(yao)精過濾才行，否則容易堵塞，比例閥(fa)要(yao)求低一些；
3.閥(fa)(fa)芯結(jie)構及加工精度不同(tong)。比例(li)(li)閥(fa)(fa)采用閥(fa)(fa)芯+閥(fa)(fa)體結(jie)構，閥(fa)(fa)體兼作閥(fa)(fa)套(tao)。伺(si)服(fu)閥(fa)(fa)和(he)伺(si)服(fu)比例(li)(li)閥(fa)(fa)采用閥(fa)(fa)芯+閥(fa)(fa)套(tao)的結(jie)構。 4.中位(wei)機能(neng)種類不(bu)同。比例(li)換向(xiang)閥具(ju)有與(yu)普通換向(xiang)閥相似的(de)中位(wei)機能(neng)，而伺(si)服閥中位(wei)機能(neng)只有O型（Rexroth產(chan)品的(de)E型）。 5.閥的額定壓降不同。 電(dian)氣(qi)(qi)(qi)比(bi)(bi)例(li)閥(fa)(fa)自動控(kong)(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)可分成(cheng)斷續(xu)控(kong)(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)和連續(xu)控(kong)(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)。斷續(xu)控(kong)(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)即開(kai)關控(kong)(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)。氣(qi)(qi)(qi)動控(kong)(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)(xi)統(tong)中(zhong)使用(yong)動作頻率(lv)較低的(de)(de)開(kai)關式(ON-OFF)的(de)(de)換(huan)向閥(fa)(fa)來(lai)控(kong)(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)氣(qi)(qi)(qi)路的(de)(de)通斷。靠(kao)減壓(ya)閥(fa)(fa)來(lai)調節所(suo)需(xu)(xu)要(yao)的(de)(de)壓(ya)力，靠(kao)節流閥(fa)(fa)來(lai)調節所(suo)需(xu)(xu)要(yao)的(de)(de)流量(liang)(liang)。這種傳統(tong)的(de)(de)氣(qi)(qi)(qi)動控(kong)(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)(xi)統(tong)要(yao)想(xiang)要(yao)有多(duo)(duo)個(ge)輸(shu)出力和多(duo)(duo)個(ge)運動速(su)度，就(jiu)需(xu)(xu)要(yao)多(duo)(duo)個(ge)減壓(ya)閥(fa)(fa)、節流閥(fa)(fa)及換(huan)向閥(fa)(fa)。這樣，不(bu)僅元件需(xu)(xu)要(yao)多(duo)(duo)，成(cheng)本高，構(gou)成(cheng)系(xi)(xi)統(tong)復雜(za)，且許(xu)多(duo)(duo)元件都需(xu)(xu)要(yao)預先進行人工調節。電(dian)氣(qi)(qi)(qi)比(bi)(bi)例(li)閥(fa)(fa)控(kong)(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)屬于(yu)連續(xu)控(kong)(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)，其特點是輸(shu)出量(liang)(liang)隨輸(shu)入(ru)量(liang)(liang)的(de)(de)變化而變化，輸(shu)出量(liang)(liang)與輸(shu)入(ru)量(liang)(liang)之間存在(zai)一定的(de)(de)比(bi)(bi)例(li)關系(xi)(xi)。比(bi)(bi)例(li)控(kong)(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)有開(kai)環控(kong)(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)和閉環控(kong)(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)之分。 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? |
