意大利ATOS比例閥主要體現在以下幾點: 1.驅(qu)動(dong)裝置(zhi)不同。比例(li)閥的驅(qu)動(dong)裝置(zhi)是比例(li)電磁(ci)鐵;伺(si)服閥的驅(qu)動(dong)裝置(zhi)是力馬達(da)或力矩(ju)馬達(da); 2.性(xing)能(neng)參數不同(tong)。滯環(huan)、中位死區(qu)、頻寬、過濾精度等(deng)特性(xing)不同(tong),因此應用場合不同(tong),伺(si)服閥(fa)和伺(si)服比(bi)例(li)閥(fa)主(zhu)要(yao)應用在閉環(huan)控(kong)制系統,其它結構的比(bi)例(li)閥(fa)主(zhu)要(yao)應用在開環(huan)控(kong)系統及閉環(huan)速度控(kong)制系統; - 伺(si)服(fu)閥中位沒(mei)有(you)死(si)區(qu),比(bi)例(li)閥有(you)中位死(si)區(qu);
- 伺服閥的頻響(響應(ying)頻率)更高(gao)(gao),可以高(gao)(gao)達200Hz左右,比例(li)閥一般zui高(gao)(gao)幾十(shi)Hz;
- 伺服(fu)閥(fa)對液(ye)壓油液(ye)的要求更高(gao),需要精過濾才行,否則容易(yi)堵(du)塞,比例(li)閥(fa)要求低一些;
3.閥(fa)(fa)芯(xin)結(jie)構及(ji)加(jia)工(gong)精度不(bu)同。比(bi)例閥(fa)(fa)采用(yong)閥(fa)(fa)芯(xin)+閥(fa)(fa)體結(jie)構,閥(fa)(fa)體兼作閥(fa)(fa)套(tao)(tao)。伺(si)服(fu)閥(fa)(fa)和伺(si)服(fu)比(bi)例閥(fa)(fa)采用(yong)閥(fa)(fa)芯(xin)+閥(fa)(fa)套(tao)(tao)的結(jie)構。 4.中位機(ji)能種類不同。比例換向閥(fa)具有與普通換向閥(fa)相似(si)的中位機(ji)能,而(er)伺服閥(fa)中位機(ji)能只有O型(xing)(Rexroth產品的E型(xing))。 5.閥的(de)額定(ding)壓(ya)降不同。 電氣(qi)比(bi)(bi)例(li)閥自動(dong)控(kong)(kong)(kong)(kong)制(zhi)(zhi)可分(fen)成(cheng)(cheng)斷續控(kong)(kong)(kong)(kong)制(zhi)(zhi)和(he)(he)連續控(kong)(kong)(kong)(kong)制(zhi)(zhi)。斷續控(kong)(kong)(kong)(kong)制(zhi)(zhi)即開關控(kong)(kong)(kong)(kong)制(zhi)(zhi)。氣(qi)動(dong)控(kong)(kong)(kong)(kong)制(zhi)(zhi)系(xi)統中使用動(dong)作頻率較(jiao)低的(de)開關式(ON-OFF)的(de)換向閥來(lai)控(kong)(kong)(kong)(kong)制(zhi)(zhi)氣(qi)路的(de)通斷。靠(kao)減壓(ya)(ya)閥來(lai)調(diao)節(jie)所需要(yao)(yao)的(de)壓(ya)(ya)力,靠(kao)節(jie)流(liu)閥來(lai)調(diao)節(jie)所需要(yao)(yao)的(de)流(liu)量(liang)(liang)(liang)。這(zhe)種(zhong)傳統的(de)氣(qi)動(dong)控(kong)(kong)(kong)(kong)制(zhi)(zhi)系(xi)統要(yao)(yao)想(xiang)要(yao)(yao)有多個輸(shu)出(chu)力和(he)(he)多個運動(dong)速度,就需要(yao)(yao)多個減壓(ya)(ya)閥、節(jie)流(liu)閥及換向閥。這(zhe)樣,不(bu)僅元件需要(yao)(yao)多,成(cheng)(cheng)本高,構成(cheng)(cheng)系(xi)統復雜,且許(xu)多元件都需要(yao)(yao)預(yu)先(xian)進(jin)行(xing)人工調(diao)節(jie)。電氣(qi)比(bi)(bi)例(li)閥控(kong)(kong)(kong)(kong)制(zhi)(zhi)屬(shu)于連續控(kong)(kong)(kong)(kong)制(zhi)(zhi),其特(te)點是輸(shu)出(chu)量(liang)(liang)(liang)隨輸(shu)入(ru)量(liang)(liang)(liang)的(de)變化(hua)而變化(hua),輸(shu)出(chu)量(liang)(liang)(liang)與(yu)輸(shu)入(ru)量(liang)(liang)(liang)之(zhi)間存在一定的(de)比(bi)(bi)例(li)關系(xi)。比(bi)(bi)例(li)控(kong)(kong)(kong)(kong)制(zhi)(zhi)有開環(huan)控(kong)(kong)(kong)(kong)制(zhi)(zhi)和(he)(he)閉環(huan)控(kong)(kong)(kong)(kong)制(zhi)(zhi)之(zhi)分(fen)。 意大利ATOS比例閥型號表: DHZO-ATE-073-P3/B/DP27SB 20 DHZO-T-051-L1 DHZO-T-051-L5 31 DHZO-T-071-D5 DHZO-T-071-L5 DHZO-T-071-S5 DHZO-TE-051-L5/Y 40 DHZO-TE-071-L5 DHZO-TE-071-S5 40 /PE DHZO-TE-073-S5 DKZA-A-173-L5/PA-M/7 DKZO-A-151-S5 DKZO-A-171-L5 DKZO-A-173-S5 DKZOR-A-151-S5 DKZOR-A-151-S5/18 40 DKZOR-A-151-S5/B DKZOR-A-153-L5/B DKZOR-A-171-D5 40 DKZOR-A-171-L5 DKZOR-A-171-S5 DKZOR-A-171-S5/18 DKZOR-A-173-D5 DKZOR-A-173-L5 DKZOR-A-173-L5/18 40 DKZOR-A-173-L5/Y DKZOR-A-173-S3 DKZOR-A-173-S5 DKZOR-A-173-S5/18 |