意大利ATOS比例閥主要體現在以下幾點: 1.驅動裝(zhuang)置(zhi)不同。比(bi)例閥的(de)驅動裝(zhuang)置(zhi)是比(bi)例電磁(ci)鐵;伺服閥的(de)驅動裝(zhuang)置(zhi)是力(li)馬達或力(li)矩馬達; 2.性能參(can)數不同。滯環(huan)、中(zhong)位死區、頻寬、過濾精度(du)等(deng)特(te)性不同,因此應(ying)(ying)用場合不同,伺(si)服(fu)閥和(he)伺(si)服(fu)比(bi)例閥主要(yao)應(ying)(ying)用在(zai)閉環(huan)控(kong)(kong)(kong)制系(xi)統,其它(ta)結(jie)構的比(bi)例閥主要(yao)應(ying)(ying)用在(zai)開環(huan)控(kong)(kong)(kong)系(xi)統及閉環(huan)速度(du)控(kong)(kong)(kong)制系(xi)統; - 伺服(fu)閥中位(wei)沒有(you)(you)死區(qu)(qu),比例(li)閥有(you)(you)中位(wei)死區(qu)(qu);
- 伺服閥的(de)頻響(響應(ying)頻率)更(geng)高,可以高達200Hz左右(you),比例閥一(yi)般zui高幾(ji)十Hz;
- 伺服(fu)閥對液(ye)壓(ya)油(you)液(ye)的要(yao)求更高,需要(yao)精過濾(lv)才行,否則(ze)容易堵塞,比例閥要(yao)求低一些;
3.閥(fa)芯(xin)(xin)結(jie)(jie)構及加(jia)工精度(du)不(bu)同。比例閥(fa)采(cai)用閥(fa)芯(xin)(xin)+閥(fa)體(ti)結(jie)(jie)構,閥(fa)體(ti)兼作閥(fa)套。伺(si)服閥(fa)和伺(si)服比例閥(fa)采(cai)用閥(fa)芯(xin)(xin)+閥(fa)套的(de)結(jie)(jie)構。 4.中(zhong)(zhong)位(wei)機(ji)能種類不(bu)同。比例換向閥具(ju)有與普(pu)通(tong)換向閥相似的中(zhong)(zhong)位(wei)機(ji)能,而伺(si)服閥中(zhong)(zhong)位(wei)機(ji)能只有O型(Rexroth產品的E型)。 5.閥的額定壓降不同(tong)。 電氣(qi)(qi)比(bi)例閥(fa)(fa)(fa)自動(dong)控(kong)(kong)(kong)制(zhi)(zhi)可分成斷(duan)續控(kong)(kong)(kong)制(zhi)(zhi)和(he)連續控(kong)(kong)(kong)制(zhi)(zhi)。斷(duan)續控(kong)(kong)(kong)制(zhi)(zhi)即開關(guan)控(kong)(kong)(kong)制(zhi)(zhi)。氣(qi)(qi)動(dong)控(kong)(kong)(kong)制(zhi)(zhi)系統(tong)中使(shi)用(yong)動(dong)作頻率較低的(de)開關(guan)式(ON-OFF)的(de)換向閥(fa)(fa)(fa)來控(kong)(kong)(kong)制(zhi)(zhi)氣(qi)(qi)路的(de)通斷(duan)。靠減壓閥(fa)(fa)(fa)來調(diao)節(jie)(jie)所(suo)需(xu)要(yao)(yao)(yao)(yao)(yao)的(de)壓力(li),靠節(jie)(jie)流閥(fa)(fa)(fa)來調(diao)節(jie)(jie)所(suo)需(xu)要(yao)(yao)(yao)(yao)(yao)的(de)流量。這種傳(chuan)統(tong)的(de)氣(qi)(qi)動(dong)控(kong)(kong)(kong)制(zhi)(zhi)系統(tong)要(yao)(yao)(yao)(yao)(yao)想要(yao)(yao)(yao)(yao)(yao)有多個輸出(chu)力(li)和(he)多個運動(dong)速度,就需(xu)要(yao)(yao)(yao)(yao)(yao)多個減壓閥(fa)(fa)(fa)、節(jie)(jie)流閥(fa)(fa)(fa)及換向閥(fa)(fa)(fa)。這樣(yang),不僅元(yuan)件需(xu)要(yao)(yao)(yao)(yao)(yao)多,成本高,構成系統(tong)復(fu)雜,且許(xu)多元(yuan)件都需(xu)要(yao)(yao)(yao)(yao)(yao)預先進行人工調(diao)節(jie)(jie)。電氣(qi)(qi)比(bi)例閥(fa)(fa)(fa)控(kong)(kong)(kong)制(zhi)(zhi)屬于連續控(kong)(kong)(kong)制(zhi)(zhi),其特點(dian)是輸出(chu)量隨輸入量的(de)變化而(er)變化,輸出(chu)量與輸入量之間(jian)存在一定(ding)的(de)比(bi)例關(guan)系。比(bi)例控(kong)(kong)(kong)制(zhi)(zhi)有開環控(kong)(kong)(kong)制(zhi)(zhi)和(he)閉環控(kong)(kong)(kong)制(zhi)(zhi)之分。 意大利ATOS比例閥型號表(biao): 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 |