意大利ATOS比例閥主要體現在以下幾點： 1.驅(qu)(qu)動裝(zhuang)置不同。比例閥(fa)的(de)驅(qu)(qu)動裝(zhuang)置是比例電磁鐵；伺(si)服閥(fa)的(de)驅(qu)(qu)動裝(zhuang)置是力馬達或(huo)力矩(ju)馬達； 2.性能參數(shu)不(bu)同(tong)。滯環、中位死區、頻寬(kuan)、過濾精(jing)度等(deng)特性不(bu)同(tong)，因此應用(yong)場合不(bu)同(tong)，伺服閥(fa)和伺服比(bi)例閥(fa)主(zhu)要應用(yong)在閉(bi)環控制系統(tong)，其它(ta)結構的(de)比(bi)例閥(fa)主(zhu)要應用(yong)在開(kai)環控系統(tong)及閉(bi)環速度控制系統(tong)； - 伺服閥中(zhong)位沒有死(si)(si)區(qu)，比例閥有中(zhong)位死(si)(si)區(qu)；
- 伺服閥的(de)頻(pin)響(xiang)（響(xiang)應頻(pin)率(lv)）更高，可以高達200Hz左右，比例閥一般zui高幾十(shi)Hz；
- 伺服閥對液壓油液的要求更(geng)高，需要精過(guo)濾才行，否則容易(yi)堵塞，比(bi)例閥要求低(di)一(yi)些；
3.閥(fa)(fa)(fa)芯結(jie)構及加工精度不同。比(bi)例(li)(li)閥(fa)(fa)(fa)采(cai)用閥(fa)(fa)(fa)芯+閥(fa)(fa)(fa)體(ti)結(jie)構，閥(fa)(fa)(fa)體(ti)兼作閥(fa)(fa)(fa)套(tao)。伺服閥(fa)(fa)(fa)和伺服比(bi)例(li)(li)閥(fa)(fa)(fa)采(cai)用閥(fa)(fa)(fa)芯+閥(fa)(fa)(fa)套(tao)的結(jie)構。 4.中(zhong)位(wei)機(ji)能(neng)種(zhong)類不同。比例換向閥具有與普通換向閥相似的中(zhong)位(wei)機(ji)能(neng)，而(er)伺服閥中(zhong)位(wei)機(ji)能(neng)只有O型（Rexroth產品的E型）。 5.閥的額定壓降不同。 電氣(qi)比(bi)例閥(fa)(fa)(fa)自(zi)動(dong)控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)可分成(cheng)(cheng)斷續控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)和連續控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)。斷續控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)即(ji)開關控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)。氣(qi)動(dong)控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)(xi)統中(zhong)使用動(dong)作頻率較低的(de)(de)開關式(ON-OFF)的(de)(de)換向閥(fa)(fa)(fa)來控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)氣(qi)路的(de)(de)通斷。靠減(jian)壓(ya)閥(fa)(fa)(fa)來調(diao)節所(suo)需要(yao)(yao)(yao)的(de)(de)壓(ya)力(li)，靠節流閥(fa)(fa)(fa)來調(diao)節所(suo)需要(yao)(yao)(yao)的(de)(de)流量。這(zhe)種傳統的(de)(de)氣(qi)動(dong)控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)(xi)統要(yao)(yao)(yao)想(xiang)要(yao)(yao)(yao)有多(duo)個輸出力(li)和多(duo)個運(yun)動(dong)速度(du)，就需要(yao)(yao)(yao)多(duo)個減(jian)壓(ya)閥(fa)(fa)(fa)、節流閥(fa)(fa)(fa)及(ji)換向閥(fa)(fa)(fa)。這(zhe)樣，不(bu)僅元件需要(yao)(yao)(yao)多(duo)，成(cheng)(cheng)本高，構成(cheng)(cheng)系(xi)(xi)統復雜，且許多(duo)元件都需要(yao)(yao)(yao)預先(xian)進行人工調(diao)節。電氣(qi)比(bi)例閥(fa)(fa)(fa)控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)屬于連續控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)，其特(te)點是(shi)輸出量隨輸入量的(de)(de)變化而變化，輸出量與輸入量之間存在(zai)一定的(de)(de)比(bi)例關系(xi)(xi)。比(bi)例控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)有開環控(kong)(kong)(kong)(kong)制(zhi)(zhi)(zhi)和閉環控(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? |
