意大利ATOS比例閥主要體現在以下幾點: 1.驅動(dong)裝置(zhi)不同。比例閥的驅動(dong)裝置(zhi)是比例電磁鐵;伺服閥的驅動(dong)裝置(zhi)是力馬(ma)達或力矩馬(ma)達; 2.性能參數不同(tong)(tong)。滯環、中位(wei)死區、頻寬、過濾精度等特性不同(tong)(tong),因此應(ying)用場合不同(tong)(tong),伺(si)服閥(fa)和伺(si)服比例閥(fa)主要應(ying)用在(zai)閉環控(kong)制系(xi)統(tong),其它結構的比例閥(fa)主要應(ying)用在(zai)開環控(kong)系(xi)統(tong)及(ji)閉環速度控(kong)制系(xi)統(tong); - 伺服(fu)閥(fa)(fa)中位沒有(you)死(si)區,比例閥(fa)(fa)有(you)中位死(si)區;
- 伺服閥的頻(pin)響(xiang)(響(xiang)應頻(pin)率(lv))更高,可以(yi)高達200Hz左右(you),比例閥一般zui高幾(ji)十Hz;
- 伺服閥對液壓(ya)油(you)液的(de)要求更高(gao),需要精過濾才(cai)行(xing),否則容易堵塞,比例閥要求低一些;
3.閥(fa)芯結構(gou)及加工精度不(bu)同。比例閥(fa)采用閥(fa)芯+閥(fa)體結構(gou),閥(fa)體兼作閥(fa)套。伺(si)(si)服閥(fa)和伺(si)(si)服比例閥(fa)采用閥(fa)芯+閥(fa)套的(de)結構(gou)。 4.中位(wei)機(ji)能種類(lei)不同。比例換向閥具有與普通換向閥相似的(de)中位(wei)機(ji)能,而伺服閥中位(wei)機(ji)能只(zhi)有O型(xing)(Rexroth產(chan)品的(de)E型(xing))。 5.閥的額定壓降(jiang)不同。 電(dian)氣(qi)比例(li)閥(fa)自動(dong)控(kong)(kong)(kong)制(zhi)可分(fen)成斷續(xu)(xu)(xu)控(kong)(kong)(kong)制(zhi)和(he)連續(xu)(xu)(xu)控(kong)(kong)(kong)制(zhi)。斷續(xu)(xu)(xu)控(kong)(kong)(kong)制(zhi)即開關控(kong)(kong)(kong)制(zhi)。氣(qi)動(dong)控(kong)(kong)(kong)制(zhi)系(xi)統(tong)中使用動(dong)作頻率較低的(de)開關式(ON-OFF)的(de)換(huan)(huan)向閥(fa)來控(kong)(kong)(kong)制(zhi)氣(qi)路的(de)通斷。靠減(jian)壓閥(fa)來調(diao)節(jie)所需(xu)(xu)要(yao)的(de)壓力,靠節(jie)流閥(fa)來調(diao)節(jie)所需(xu)(xu)要(yao)的(de)流量(liang)。這種(zhong)傳統(tong)的(de)氣(qi)動(dong)控(kong)(kong)(kong)制(zhi)系(xi)統(tong)要(yao)想要(yao)有(you)多個(ge)輸(shu)出力和(he)多個(ge)運動(dong)速度,就需(xu)(xu)要(yao)多個(ge)減(jian)壓閥(fa)、節(jie)流閥(fa)及換(huan)(huan)向閥(fa)。這樣,不(bu)僅元(yuan)件(jian)需(xu)(xu)要(yao)多,成本高,構成系(xi)統(tong)復雜,且許多元(yuan)件(jian)都需(xu)(xu)要(yao)預(yu)先進(jin)行人工調(diao)節(jie)。電(dian)氣(qi)比例(li)閥(fa)控(kong)(kong)(kong)制(zhi)屬(shu)于連續(xu)(xu)(xu)控(kong)(kong)(kong)制(zhi),其特點是輸(shu)出量(liang)隨輸(shu)入(ru)量(liang)的(de)變化而變化,輸(shu)出量(liang)與(yu)輸(shu)入(ru)量(liang)之(zhi)間存在一定的(de)比例(li)關系(xi)。比例(li)控(kong)(kong)(kong)制(zhi)有(you)開環控(kong)(kong)(kong)制(zhi)和(he)閉(bi)環控(kong)(kong)(kong)制(zhi)之(zhi)分(fen)。 意大利ATOS比例閥型號(hao)表: LEQZO-A-162S4 LEQZO-A-252L4 LEQZO-A-252S4 LIQZO-LE-252L4 LIQZO-LE-253L4 LIQZO-LE-253L4/Q LIQZO-LE-322L4 LIQZO-LE-322L4/F LIQZO-LE-322L4/Q LIQZO-LE-402L4 LIQZO-LE-403-L4 LIQZO-LE-403-L4/Q LIQZO-LE-502L4 LIQZO-LE-503L4 LIQZO-LE-632L4 LIQZO-LE-632L4/Q LIQZO-LE-633L4 LIQZO-LE-803-L4 LIQZO-LE-803-L4/F LIQZO-LES-BP-502L4/Z LIQZO-LES-PS-162L4 LIQZO-LES-PS-162L4/Z LIQZO-T-402L4 LIQZO-T-502L4 LIQZO-TE-162L4 LIQZO-TE-252L4 LIQZO-TE-252L4/I LIQZO-TE-322L4 LIQZO-TE-322L4/F LIQZO-TE-402L4 LIQZO-TE-502L4 LIQZO-TES-PS-162L4 |