ATOS電磁換向閥意大利原裝意大利(li)ATOS換(huan)向閥由于受到(dao)電(dian)(dian)(dian)磁鐵吸力較小(xiao)的(de)(de)(de)限制，它的(de)(de)(de)額定流(liu)量一(yi)般(ban)在60L/min以下，流(liu)量更(geng)大的(de)(de)(de)閥一(yi)般(ban)采(cai)用液(ye)壓驅(qu)動(dong)或電(dian)(dian)(dian)液(ye)驅(qu)動(dong)。ATOS電(dian)(dian)(dian)磁換(huan)向閥控制油(you)(you)路的(de)(de)(de)進油(you)(you)方式有內(nei)(nei)部(bu)進油(you)(you)和(he)外(wai)部(bu)進油(you)(you)兩(liang)種，回(hui)油(you)(you)方式也有內(nei)(nei)部(bu)回(hui)油(you)(you)和(he)外(wai)部(bu)回(hui)油(you)(you)兩(liang)種內(nei)(nei)部(bu)進油(you)(you)、內(nei)(nei)部(bu)回(hui)油(you)(you)的(de)(de)(de)電(dian)(dian)(dian)液(ye)換(huan)向閥。

3.換向閥的中位(wei)機能分析

三位(wei)(wei)四通(tong)(tong)換(huan)向(xiang)閥的(de)(de)(de)(de)閥芯在(zai)中(zhong)(zhong)間位(wei)(wei)置時，各通(tong)(tong)口間有不同(tong)的(de)(de)(de)(de)連(lian)通(tong)(tong)方式，可滿足不同(tong)的(de)(de)(de)(de)使用(yong)要(yao)求。這種連(lian)通(tong)(tong)方式稱(cheng)為(wei)換(huan)向(xiang)閥的(de)(de)(de)(de)中(zhong)(zhong)位(wei)(wei)機(ji)能(neng)。三位(wei)(wei)四通(tong)(tong)換(huan)向(xiang)閥常見的(de)(de)(de)(de)中(zhong)(zhong)位(wei)(wei)機(ji)能(neng)、型號、符號及其(qi)特點，示于表8-11中(zhong)(zhong)。三位(wei)(wei)五通(tong)(tong)換(huan)向(xiang)閥的(de)(de)(de)(de)情(qing)況(kuang)與此相(xiang)仿。不同(tong)的(de)(de)(de)(de)中(zhong)(zhong)位(wei)(wei)機(ji)能(neng)是通(tong)(tong)過改(gai)變閥芯的(de)(de)(de)(de)形狀和尺寸得到(dao)的(de)(de)(de)(de)。

在分(fen)析和選擇換向閥的中位機能時，通常考慮(lv)以下(xia)幾(ji)點(dian)：

（1）系(xi)(xi)統(tong)(tong)保(bao)壓(ya)。當P口被堵塞，系(xi)(xi)統(tong)(tong)保(bao)壓(ya)，液(ye)壓(ya)泵能用于(yu)多缸系(xi)(xi)統(tong)(tong)。當P口不(bu)太通(tong)暢(chang)地(di)與T口接通(tong)時（如(ru)X型），系(xi)(xi)統(tong)(tong)能保(bao)持(chi)一定的(de)壓(ya)力供控制油路使(shi)用。

表8-11 三(san)位四通換向閥常(chang)見中(zhong)位機能(neng)

（2）系(xi)統卸荷。P口(kou)通暢地與T口(kou)接通時，系(xi)統卸荷。

（3）啟動平穩性(xing)。閥在中(zhong)位時，液(ye)壓缸某腔(qiang)如通油箱，則(ze)啟動時該腔(qiang)內因無油液(ye)起緩沖作(zuo)用，啟動不(bu)太平穩。

（4）液(ye)壓(ya)(ya)缸“浮動"和在任(ren)意位(wei)(wei)置上的(de)停止，閥在中位(wei)(wei)，當(dang)A、B兩口互通時，臥式液(ye)壓(ya)(ya)缸呈“浮動"狀(zhuang)態，可利用其他機構移動工作臺，調整其位(wei)(wei)置。

ATOS電磁換(huan)向(xiang)(xiang)閥(fa)是利用壓(ya)力(li)油(you)來操縱閥(fa)芯(xin)(xin)運動(dong)的(de)換(huan)向(xiang)(xiang)閥(fa)。圖(tu)8-13為三位(wei)(wei)四通(tong)(tong)液(ye)(ye)動(dong)換(huan)向(xiang)(xiang)閥(fa)的(de)結構和職(zhi)能符號(hao)。閥(fa)芯(xin)(xin)是由其(qi)兩端(duan)密封(feng)腔(qiang)中油(you)液(ye)(ye)的(de)壓(ya)差(cha)來移動(dong)的(de)，閥(fa)芯(xin)(xin)兩端(duan)有控(kong)制油(you)腔(qiang)分別(bie)接通(tong)(tong)控(kong)制油(you)口K1和K2，當控(kong)制油(you)路(lu)的(de)壓(ya)力(li)油(you)從(cong)閥(fa)右(you)邊的(de)控(kong)制油(you)口K2進入滑閥(fa)右(you)腔(qiang)時(shi)，閥(fa)芯(xin)(xin)向(xiang)(xiang)左移動(dong)，使壓(ya)力(li)油(you)口P與(yu)B相通(tong)(tong)，A與(yu)T相通(tong)(tong)；當K1接通(tong)(tong)壓(ya)力(li)油(you)時(shi)，閥(fa)芯(xin)(xin)向(xiang)(xiang)右(you)移動(dong)，使得P與(yu)A相通(tong)(tong)，B與(yu)T相通(tong)(tong)；當K1、K2都通(tong)(tong)回(hui)油(you)時(shi)，閥(fa)芯(xin)(xin)在兩端(duan)彈(dan)簧和定(ding)位(wei)(wei)套(tao)作(zuo)用下回(hui)到中間位(wei)(wei)置(zhi)。

意大利阿(a)托斯ATOS換(huan)向(xiang)閥(fa)(fa)是具有(you)兩(liang)(liang)(liang)種(zhong)(zhong)以(yi)上流動(dong)(dong)(dong)(dong)(dong)(dong)(dong)形式和(he)兩(liang)(liang)(liang)個以(yi)上油(you)(you)(you)口的(de)(de)方向(xiang)控(kong)(kong)制(zhi)(zhi)(zhi)閥(fa)(fa)。是實現(xian)液(ye)壓(ya)油(you)(you)(you)流的(de)(de)溝通(tong)、切斷(duan)和(he)換(huan)向(xiang)，以(yi)及(ji)壓(ya)力(li)卸載和(he)順(shun)序動(dong)(dong)(dong)(dong)(dong)(dong)(dong)作(zuo)(zuo)(zuo)控(kong)(kong)制(zhi)(zhi)(zhi)的(de)(de)閥(fa)(fa)門。靠閥(fa)(fa)芯與(yu)閥(fa)(fa)體(ti)(ti)的(de)(de)相(xiang)對運(yun)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)的(de)(de)方向(xiang)控(kong)(kong)制(zhi)(zhi)(zhi)閥(fa)(fa)。有(you)轉 閥(fa)(fa)式和(he)滑閥(fa)(fa)式兩(liang)(liang)(liang)種(zhong)(zhong)。按閥(fa)(fa)芯在(zai)(zai)閥(fa)(fa)體(ti)(ti)內停留的(de)(de)工(gong)(gong)作(zuo)(zuo)(zuo)位(wei) 置數分為二位(wei)、三(san)位(wei)等;按與(yu)閥(fa)(fa)體(ti)(ti)相(xiang)連(lian)的(de)(de)油(you)(you)(you)路數分為 二通(tong)、三(san)通(tong)、四通(tong)和(he)六(liu)通(tong)等;操作(zuo)(zuo)(zuo)閥(fa)(fa)芯運(yun)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)的(de)(de)方式有(you) 手(shou)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)、機動(dong)(dong)(dong)(dong)(dong)(dong)(dong)、電動(dong)(dong)(dong)(dong)(dong)(dong)(dong)、液(ye)動(dong)(dong)(dong)(dong)(dong)(dong)(dong)、電液(ye)等型式。意大利阿(a)托斯ATOS換(huan)向(xiang)閥(fa)(fa)優(you)點：動(dong)(dong)(dong)(dong)(dong)(dong)(dong)作(zuo)(zuo)(zuo)準確(que)、自動(dong)(dong)(dong)(dong)(dong)(dong)(dong)化(hua)程度高、工(gong)(gong)作(zuo)(zuo)(zuo)穩定可靠，但需附設驅動(dong)(dong)(dong)(dong)(dong)(dong)(dong)和(he)冷(leng)卻系統，結構(gou)較為復(fu)雜(za)；閥(fa)(fa)瓣式結構(gou)則較簡單，多用于流量(liang)(liang)較小的(de)(de)生產工(gong)(gong)藝(yi)上。在(zai)(zai)石油(you)(you)(you)、化(hua)工(gong)(gong)、礦山(shan)和(he)冶金(jin)等行(xing)業中(zhong)，六(liu)通(tong)換(huan)向(xiang)閥(fa)(fa)是一種(zhong)(zhong)重要的(de)(de)流體(ti)(ti)換(huan)向(xiang)設備。該閥(fa)(fa)安裝在(zai)(zai)稀油(you)(you)(you)潤滑系統輸送潤滑油(you)(you)(you)的(de)(de)管道(dao)中(zhong)。通(tong)過變換(huan)密封組件(jian)在(zai)(zai)閥(fa)(fa)體(ti)(ti)中(zhong)的(de)(de)相(xiang)對位(wei)置，使(shi)閥(fa)(fa)體(ti)(ti)各通(tong)道(dao)連(lian)通(tong)或斷(duan)開(kai)，從而(er)控(kong)(kong)制(zhi)(zhi)(zhi)流體(ti)(ti)的(de)(de)換(huan)向(xiang)和(he)啟停。意大利阿(a)托斯ATOS換(huan)向(xiang)閥(fa)(fa)在(zai)(zai)各個不同的(de)(de)工(gong)(gong)作(zuo)(zuo)(zuo)位(wei)置，在(zai)(zai)規定的(de)(de)工(gong)(gong)作(zuo)(zuo)(zuo)壓(ya)力(li)下，從高壓(ya)腔(qiang)漏到低壓(ya)腔(qiang)的(de)(de)泄(xie)漏量(liang)(liang)為內泄(xie)漏量(liang)(liang)。過大的(de)(de)內泄(xie)漏量(liang)(liang)不僅會(hui)降低系統的(de)(de)效率，引起(qi)過熱，而(er)且還會(hui)影響執行(xing)機構(gou)的(de)(de)正常工(gong)(gong)作(zuo)(zuo)(zuo)。

ATOS電磁換向閥部分型號如下：

SDHE-0713P-X 24DC 10S

SDHE-0713-X 00 10S

SDHE-0713-X 24DC

SDHE-0713-X 24DC 10S

SDHE-0713-X 28DC 10

SDHE-0713-X 28DC 10S

SDHI-0611/A-X 24DC 23

SDHI-0614-X 12DC 23

SDHI-0631/2/A-X 00

SDHI-0631/2/A-X 24DC

SDHI-0631/2/A-X 24DC 23

SDHI-0631/2/A-X 24DC 23

SDHI-0631/2/A-X 28DC

SDHI-0631/2-00 23

SDHI-0631/2-X 230/50/60AC

SDHI-0631/2-X 230/50/60AC 23

SDHI-0631/2-X 24DC

SDHI-0631/2-X 24DC 23

SDHI-0631/2-X 28DC

SDHI-0632/2/A-X 24DC 23

ATOS比例換向閥是一款直動(dong)式數字型(xing)閥，不(bu)帶(dai)位置傳感器，帶(dai)正遮(zhe)蓋閥芯，用于開環換向控(kong)制，無壓力補償流量控(kong)制。

此類閥有不同的型式可(ke)供(gong)選擇：

1、A型(xing)，不帶集(ji)成(cheng)式(shi)放大(da)(da)器(qi)，與(yu)分體(ti)式(shi)放大(da)(da)器(qi)配合使(shi)用(yong)2、AEB型(xing)，帶基本型(xing)集(ji)成(cheng)式(shi)數字放大(da)(da)器(qi)，模擬(ni)參考信(xin)號和USB接(jie)口用(yong)于軟(ruan)件(jian)功(gong)能參數設置3、AES型(xing)，帶全功(gong)能型(xing)集(ji)成(cheng)式(shi)數字型(xing)放大(da)(da)器(qi)和線通訊(xun)接(jie)口，用(yong)于設置功(gong)能參數。

集成式數字型電子放大器根據參考信號對閥進行液壓調節，出廠預調，保證閥與閥之間可互換。ATOS電磁換向閥意大利原裝圖片如下：