意大利ATOS比例閥主要體現在以下幾點: 1.驅動(dong)(dong)裝(zhuang)(zhuang)置(zhi)不同(tong)。比例(li)閥的驅動(dong)(dong)裝(zhuang)(zhuang)置(zhi)是比例(li)電磁鐵;伺服閥的驅動(dong)(dong)裝(zhuang)(zhuang)置(zhi)是力(li)馬達(da)或力(li)矩馬達(da); 2.性能參數(shu)不(bu)同。滯(zhi)環、中(zhong)位死區、頻寬(kuan)、過(guo)濾精度(du)等特性不(bu)同,因此(ci)應用(yong)場合不(bu)同,伺(si)服閥(fa)和(he)伺(si)服比例閥(fa)主(zhu)要(yao)(yao)應用(yong)在閉環控制系統,其(qi)它結構(gou)的比例閥(fa)主(zhu)要(yao)(yao)應用(yong)在開(kai)環控系統及(ji)閉環速度(du)控制系統; - 伺(si)服(fu)閥(fa)中(zhong)位(wei)沒有死區,比例閥(fa)有中(zhong)位(wei)死區;
- 伺服閥的頻(pin)響(響應頻(pin)率)更高,可以(yi)高達(da)200Hz左右,比例閥一般(ban)zui高幾十Hz;
- 伺服閥對液壓(ya)油液的要求(qiu)更高,需要精過(guo)濾才行,否則容(rong)易堵塞,比(bi)例閥要求(qiu)低一些;
3.閥(fa)(fa)(fa)芯結構及加工精度(du)不同。比例閥(fa)(fa)(fa)采用閥(fa)(fa)(fa)芯+閥(fa)(fa)(fa)體(ti)結構,閥(fa)(fa)(fa)體(ti)兼作(zuo)閥(fa)(fa)(fa)套。伺服(fu)(fu)閥(fa)(fa)(fa)和伺服(fu)(fu)比例閥(fa)(fa)(fa)采用閥(fa)(fa)(fa)芯+閥(fa)(fa)(fa)套的結構。 4.中(zhong)位機能種類不(bu)同。比例換向閥具(ju)有(you)與普通換向閥相似(si)的(de)中(zhong)位機能,而伺服閥中(zhong)位機能只有(you)O型(Rexroth產品的(de)E型)。 5.閥的額定壓降不(bu)同。 電氣(qi)(qi)(qi)比例閥(fa)(fa)(fa)自動(dong)(dong)控(kong)(kong)制(zhi)(zhi)可分成斷(duan)續控(kong)(kong)制(zhi)(zhi)和(he)連(lian)續控(kong)(kong)制(zhi)(zhi)。斷(duan)續控(kong)(kong)制(zhi)(zhi)即(ji)開關控(kong)(kong)制(zhi)(zhi)。氣(qi)(qi)(qi)動(dong)(dong)控(kong)(kong)制(zhi)(zhi)系(xi)統(tong)中使用動(dong)(dong)作頻率較(jiao)低的(de)(de)(de)開關式(ON-OFF)的(de)(de)(de)換(huan)向閥(fa)(fa)(fa)來(lai)控(kong)(kong)制(zhi)(zhi)氣(qi)(qi)(qi)路的(de)(de)(de)通斷(duan)。靠(kao)減(jian)壓(ya)閥(fa)(fa)(fa)來(lai)調(diao)節所需(xu)要(yao)的(de)(de)(de)壓(ya)力(li),靠(kao)節流(liu)(liu)閥(fa)(fa)(fa)來(lai)調(diao)節所需(xu)要(yao)的(de)(de)(de)流(liu)(liu)量(liang)。這種傳統(tong)的(de)(de)(de)氣(qi)(qi)(qi)動(dong)(dong)控(kong)(kong)制(zhi)(zhi)系(xi)統(tong)要(yao)想要(yao)有多(duo)個(ge)輸(shu)出力(li)和(he)多(duo)個(ge)運動(dong)(dong)速度,就(jiu)需(xu)要(yao)多(duo)個(ge)減(jian)壓(ya)閥(fa)(fa)(fa)、節流(liu)(liu)閥(fa)(fa)(fa)及換(huan)向閥(fa)(fa)(fa)。這樣,不僅元(yuan)件(jian)需(xu)要(yao)多(duo),成本高,構成系(xi)統(tong)復雜,且許多(duo)元(yuan)件(jian)都需(xu)要(yao)預先進(jin)行(xing)人工調(diao)節。電氣(qi)(qi)(qi)比例閥(fa)(fa)(fa)控(kong)(kong)制(zhi)(zhi)屬(shu)于連(lian)續控(kong)(kong)制(zhi)(zhi),其(qi)特(te)點是輸(shu)出量(liang)隨輸(shu)入量(liang)的(de)(de)(de)變(bian)(bian)化(hua)而(er)變(bian)(bian)化(hua),輸(shu)出量(liang)與(yu)輸(shu)入量(liang)之間(jian)存在一定的(de)(de)(de)比例關系(xi)。比例控(kong)(kong)制(zhi)(zhi)有開環控(kong)(kong)制(zhi)(zhi)和(he)閉(bi)環控(kong)(kong)制(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? |