意大利ATOS比例閥主要體現在以下幾點： 1.驅動(dong)裝(zhuang)(zhuang)置(zhi)(zhi)不同。比例(li)(li)閥(fa)的驅動(dong)裝(zhuang)(zhuang)置(zhi)(zhi)是比例(li)(li)電磁鐵；伺服閥(fa)的驅動(dong)裝(zhuang)(zhuang)置(zhi)(zhi)是力馬達或力矩馬達； 2.性(xing)能參數不(bu)同。滯(zhi)環、中位死區、頻(pin)寬、過(guo)濾精度等特性(xing)不(bu)同，因此應(ying)用(yong)(yong)場合不(bu)同，伺服閥(fa)和伺服比(bi)例(li)閥(fa)主要應(ying)用(yong)(yong)在(zai)閉環控制系統，其它結構(gou)的(de)比(bi)例(li)閥(fa)主要應(ying)用(yong)(yong)在(zai)開環控系統及閉環速度控制系統； - 伺服閥中位(wei)沒有死(si)(si)區(qu)，比例閥有中位(wei)死(si)(si)區(qu)；
- 伺(si)服(fu)閥(fa)的頻響(xiang)（響(xiang)應頻率）更高，可以高達200Hz左(zuo)右，比(bi)例閥(fa)一般zui高幾十Hz；
- 伺服閥(fa)對(dui)液壓油液的要求更高，需要精過濾才行，否則容易(yi)堵(du)塞，比例閥(fa)要求低一些；
3.閥(fa)(fa)芯(xin)結(jie)構及加工精(jing)度不(bu)同(tong)。比例(li)閥(fa)(fa)采(cai)用閥(fa)(fa)芯(xin)+閥(fa)(fa)體(ti)結(jie)構，閥(fa)(fa)體(ti)兼(jian)作閥(fa)(fa)套(tao)。伺服(fu)閥(fa)(fa)和伺服(fu)比例(li)閥(fa)(fa)采(cai)用閥(fa)(fa)芯(xin)+閥(fa)(fa)套(tao)的結(jie)構。 4.中(zhong)位機(ji)能種類不同。比例換向閥(fa)具有(you)與普(pu)通換向閥(fa)相似的中(zhong)位機(ji)能，而伺(si)服閥(fa)中(zhong)位機(ji)能只(zhi)有(you)O型(xing)（Rexroth產品(pin)的E型(xing)）。 5.閥的額(e)定壓降不同。 電氣(qi)(qi)比例(li)閥(fa)(fa)自動(dong)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)可分(fen)成斷續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)和連續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)。斷續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)即開關(guan)(guan)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)。氣(qi)(qi)動(dong)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)(xi)統(tong)中使(shi)用(yong)動(dong)作頻率較低的開關(guan)(guan)式(shi)(ON-OFF)的換(huan)向(xiang)閥(fa)(fa)來(lai)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)氣(qi)(qi)路的通斷。靠減(jian)壓(ya)(ya)閥(fa)(fa)來(lai)調(diao)節(jie)(jie)(jie)所需(xu)要的壓(ya)(ya)力(li)，靠節(jie)(jie)(jie)流閥(fa)(fa)來(lai)調(diao)節(jie)(jie)(jie)所需(xu)要的流量。這種(zhong)傳統(tong)的氣(qi)(qi)動(dong)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)(xi)統(tong)要想要有多(duo)(duo)個(ge)(ge)(ge)輸出(chu)力(li)和多(duo)(duo)個(ge)(ge)(ge)運動(dong)速度，就需(xu)要多(duo)(duo)個(ge)(ge)(ge)減(jian)壓(ya)(ya)閥(fa)(fa)、節(jie)(jie)(jie)流閥(fa)(fa)及換(huan)向(xiang)閥(fa)(fa)。這樣，不(bu)僅元件需(xu)要多(duo)(duo)，成本高，構成系(xi)(xi)統(tong)復雜，且許多(duo)(duo)元件都需(xu)要預先進行人工調(diao)節(jie)(jie)(jie)。電氣(qi)(qi)比例(li)閥(fa)(fa)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)屬于連續(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)，其(qi)特點是輸出(chu)量隨(sui)輸入量的變化而變化，輸出(chu)量與(yu)輸入量之間存在一定的比例(li)關(guan)(guan)系(xi)(xi)。比例(li)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)有開環(huan)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)和閉環(huan)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)之分(fen)。 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? |
