意大利ATOS比例閥主要體現在以下幾點: 1.驅(qu)動裝(zhuang)置(zhi)不同(tong)。比(bi)例(li)閥的驅(qu)動裝(zhuang)置(zhi)是比(bi)例(li)電(dian)磁鐵(tie);伺服閥的驅(qu)動裝(zhuang)置(zhi)是力(li)馬(ma)達(da)或力(li)矩(ju)馬(ma)達(da); 2.性(xing)能參數不(bu)同。滯環、中位死區、頻寬、過濾精度等特性(xing)不(bu)同,因此應用(yong)(yong)場合不(bu)同,伺服(fu)閥和伺服(fu)比例(li)閥主要(yao)應用(yong)(yong)在(zai)閉(bi)環控制系統,其它結(jie)構的比例(li)閥主要(yao)應用(yong)(yong)在(zai)開環控系統及閉(bi)環速度控制系統; - 伺服閥(fa)中位沒(mei)有(you)死區(qu),比(bi)例閥(fa)有(you)中位死區(qu);
- 伺服(fu)閥的頻(pin)響(xiang)(響(xiang)應頻(pin)率)更高,可(ke)以高達200Hz左右,比(bi)例閥一般zui高幾(ji)十Hz;
- 伺服閥對液壓油液的要(yao)求(qiu)更高,需(xu)要(yao)精過(guo)濾才(cai)行,否則容易堵(du)塞,比例閥要(yao)求(qiu)低一些;
3.閥芯(xin)結(jie)構及加工(gong)精度不同。比(bi)例(li)閥采(cai)(cai)用閥芯(xin)+閥體(ti)結(jie)構,閥體(ti)兼作(zuo)閥套(tao)。伺服閥和伺服比(bi)例(li)閥采(cai)(cai)用閥芯(xin)+閥套(tao)的結(jie)構。 4.中(zhong)(zhong)位機(ji)(ji)能種類不同。比例換(huan)向閥具有(you)與普通換(huan)向閥相(xiang)似的中(zhong)(zhong)位機(ji)(ji)能,而伺服閥中(zhong)(zhong)位機(ji)(ji)能只有(you)O型(Rexroth產品(pin)的E型)。 5.閥的額定壓(ya)降不同。 電(dian)氣比(bi)(bi)例(li)閥(fa)自動(dong)控(kong)(kong)制(zhi)(zhi)可分成(cheng)(cheng)斷(duan)續(xu)(xu)控(kong)(kong)制(zhi)(zhi)和連續(xu)(xu)控(kong)(kong)制(zhi)(zhi)。斷(duan)續(xu)(xu)控(kong)(kong)制(zhi)(zhi)即(ji)開(kai)關(guan)(guan)控(kong)(kong)制(zhi)(zhi)。氣動(dong)控(kong)(kong)制(zhi)(zhi)系統(tong)中(zhong)使用動(dong)作頻率較低的開(kai)關(guan)(guan)式(ON-OFF)的換向(xiang)閥(fa)來控(kong)(kong)制(zhi)(zhi)氣路的通斷(duan)。靠減壓閥(fa)來調(diao)節(jie)(jie)(jie)(jie)所需(xu)要(yao)的壓力(li)(li),靠節(jie)(jie)(jie)(jie)流閥(fa)來調(diao)節(jie)(jie)(jie)(jie)所需(xu)要(yao)的流量(liang)。這種傳統(tong)的氣動(dong)控(kong)(kong)制(zhi)(zhi)系統(tong)要(yao)想要(yao)有多個輸出(chu)力(li)(li)和多個運(yun)動(dong)速度,就需(xu)要(yao)多個減壓閥(fa)、節(jie)(jie)(jie)(jie)流閥(fa)及(ji)換向(xiang)閥(fa)。這樣,不僅元(yuan)件需(xu)要(yao)多,成(cheng)(cheng)本高,構(gou)成(cheng)(cheng)系統(tong)復雜,且許(xu)多元(yuan)件都需(xu)要(yao)預先進(jin)行人工調(diao)節(jie)(jie)(jie)(jie)。電(dian)氣比(bi)(bi)例(li)閥(fa)控(kong)(kong)制(zhi)(zhi)屬(shu)于(yu)連續(xu)(xu)控(kong)(kong)制(zhi)(zhi),其(qi)特(te)點(dian)是輸出(chu)量(liang)隨輸入量(liang)的變(bian)化(hua)而變(bian)化(hua),輸出(chu)量(liang)與輸入量(liang)之間存在一定(ding)的比(bi)(bi)例(li)關(guan)(guan)系。比(bi)(bi)例(li)控(kong)(kong)制(zhi)(zhi)有開(kai)環控(kong)(kong)制(zhi)(zhi)和閉環控(kong)(kong)制(zhi)(zhi)之分。 意大利ATOS比例閥型號(hao)表: QVHZO-A-0612 20 QVHZO-A-0618 QVHZO-A-063 QVHZO-A-0636 QVHZO-A-0645 QVHZO-AE-063I 10 QVHZO-AE-0645I QVHZO-T-0612 31 QVHZO-T-063 31WG QVHZO-TE-0618 40 QVHZO-TE-0618I 40 QVHZO-TE-063 40 QVKZOR-A-1065 QVKZOR-AE-1090 10 QVKZOR-AES-BC-1065 10 QVKZOR-T-1065 QVKZOR-TE-1065 QVKZOR-TE-1065F 20 QVZO-A-20210-S4 QVZO-A-202-L418V 20 QVZO-A-202-S4 30 QVZO-A-202-S4V QVZO-A-203-S4 30 |