意大利ATOS比例閥主要體現在以下幾點： 1.驅動(dong)裝(zhuang)(zhuang)(zhuang)置(zhi)不(bu)同。比(bi)例閥(fa)的驅動(dong)裝(zhuang)(zhuang)(zhuang)置(zhi)是比(bi)例電(dian)磁鐵；伺服閥(fa)的驅動(dong)裝(zhuang)(zhuang)(zhuang)置(zhi)是力馬(ma)達或力矩馬(ma)達； 2.性能參(can)數不(bu)同(tong)。滯(zhi)環、中位死區、頻(pin)寬、過(guo)濾精度(du)等特(te)性不(bu)同(tong)，因(yin)此應用(yong)場(chang)合不(bu)同(tong)，伺服閥(fa)和伺服比(bi)例閥(fa)主要(yao)應用(yong)在(zai)閉環控制系統，其它結構(gou)的比(bi)例閥(fa)主要(yao)應用(yong)在(zai)開環控系統及閉環速(su)度(du)控制系統； - 伺服(fu)閥中位(wei)沒有(you)死區(qu)，比例閥有(you)中位(wei)死區(qu)；
- 伺服閥(fa)(fa)的頻響（響應頻率）更高(gao)，可以高(gao)達200Hz左右，比(bi)例閥(fa)(fa)一(yi)般zui高(gao)幾(ji)十Hz；
- 伺服(fu)閥對(dui)液壓油液的要求更高(gao)，需要精(jing)過濾才行，否則(ze)容易堵塞，比例閥要求低一些(xie)；
3.閥芯(xin)結(jie)(jie)構及(ji)加(jia)工精度不同。比例閥采用閥芯(xin)+閥體結(jie)(jie)構，閥體兼作(zuo)閥套。伺服閥和伺服比例閥采用閥芯(xin)+閥套的結(jie)(jie)構。 4.中(zhong)位(wei)(wei)機能(neng)種類不同。比例換向閥(fa)具有與普通(tong)換向閥(fa)相似的中(zhong)位(wei)(wei)機能(neng)，而伺服閥(fa)中(zhong)位(wei)(wei)機能(neng)只有O型(xing)（Rexroth產品的E型(xing)）。 5.閥的額定壓降(jiang)不(bu)同。 電氣(qi)比(bi)例(li)閥(fa)自動控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)可(ke)分(fen)成(cheng)斷續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)和(he)連(lian)續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)。斷續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)即開(kai)關控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)。氣(qi)動控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)系(xi)(xi)統中使用動作頻(pin)率較低(di)的(de)開(kai)關式(ON-OFF)的(de)換(huan)向閥(fa)來(lai)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)氣(qi)路的(de)通斷。靠減(jian)壓(ya)閥(fa)來(lai)調(diao)(diao)節(jie)所(suo)需要(yao)的(de)壓(ya)力(li)，靠節(jie)流閥(fa)來(lai)調(diao)(diao)節(jie)所(suo)需要(yao)的(de)流量。這種傳統的(de)氣(qi)動控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)系(xi)(xi)統要(yao)想要(yao)有多(duo)個輸(shu)(shu)出力(li)和(he)多(duo)個運動速(su)度，就需要(yao)多(duo)個減(jian)壓(ya)閥(fa)、節(jie)流閥(fa)及換(huan)向閥(fa)。這樣(yang)，不(bu)僅元件需要(yao)多(duo)，成(cheng)本高，構成(cheng)系(xi)(xi)統復雜，且許(xu)多(duo)元件都需要(yao)預先進行人工(gong)調(diao)(diao)節(jie)。電氣(qi)比(bi)例(li)閥(fa)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)屬于(yu)連(lian)續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)，其特點是輸(shu)(shu)出量隨輸(shu)(shu)入(ru)量的(de)變化而變化，輸(shu)(shu)出量與輸(shu)(shu)入(ru)量之(zhi)間(jian)存在一定的(de)比(bi)例(li)關系(xi)(xi)。比(bi)例(li)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)有開(kai)環控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)和(he)閉(bi)環控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)之(zhi)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? |
