具(ju)體詳情(qing)如(ru)下(xia)：VICKERS電(dian)磁(ci)閥(fa)和安全閥(fa)為壹體，組成(cheng)先導(dǎo)(dao)式(shi)壓(ya)力閥(fa)，該閥(fa)即(ji)是卸(xie)荷(he)閥(fa)又是(shi)安(an)全(quan)閥(fa)，有時(shí)又是(shi)溢流(liu)閥(fa)．卸荷(he)時(shí)(shi)其控制油(you)道(dao)貫穿(chuan)各(ge)路換(huan)向閥(fa)，同(tong)前(qian)述卸(xie)荷(he)油(you)道(dao)．當(dāng)各(ge)路換(huan)向閥(fa)處(chu)於中(zhong)立(li)位置時(shí)，卸荷(he)閥(fa)的控制油(you)道(dao)(見(jiàn)圖(tu)1b和(he)圖(tu)2)貫穿(chuan)各(ge)路換(huan)向閥(fa)並與油箱連(lian)通(tong)．卸(xie)荷(he)時(shí)(shi)，大部(bu)分油液(ye)卸(xie)荷(he)，通(tong)道(dao)短(duan)，壓(ya)力損(sun)失低(di)．任(ren)壹路閥(fa)換(huan)向工(gong)作(zuo)，便(bian)切(qie)斷(duan)控(kong)制油(you)道(dao)，油源(yuan)來(lái)(lai)油(you)就從換(huan)向閥(fa)進(jìn)入執(zhí)(zhi)行(xing)元件(jian)工作(zuo)，其工(gong)作(zuo)壓(ya)力大小(xiao)由導(dǎo)(dao)閥(fa)控制．此(ci)時(shí)(shi)系(xi)統(tǒng)(tong)壓(ya)力為導(dǎo)(dao)閥(fa)調(diào)整(zheng)壓(ya)力．該(gai)種(zhong)卸(xie)荷(he)方(fang)式(shi)，即(ji)使換(huan)向閥(fa)路數(shù)增(zeng)加(jia)，只(zhi)是(shi)控(kong)制油(you)道(dao)增(zeng)加(jia)，卸(xie)荷(he)壓(ya)力增(zeng)加(jia)不大，始終(zhong)保(bao)持(chi)較低(di)卸(xie)荷(he)壓(ya)力，此(ci)種(zhong)卸(xie)荷(he)方(fang)式(shi)多用於手(shou)動(dòng)(dong)換(huan)向閥(fa)，卸荷(he)可(ke)靠．
VICKERS電(dian)磁(ci)閥(fa)(又是(shi)安(an)全(quan)閥(fa))的主(zhu)閥(fa)按(an)配合(he)形(xing)式(shi)不同(tong)可(ke)分為三(san)級(jí)(ji)同(tong)心(xin)、二(er)級(jí)(ji)同(tong)心(xin)和(he)滑閥(fa)式(shi)三(san)類(lèi)(lei)．其中(zhong)滑閥(fa)式(shi)結(jié)(jie)構(gòu)(gou)工(gong)作(zuo)壓(ya)力低(di)，控(kong)制壓(ya)力精(jing)度不高；三(san)級(jí)(ji)同(tong)心(xin)結(jié)(jie)構(gòu)(gou)雖成(cheng)熟(shu)，應(yīng)用(yong)較廣(guang)，但與二(er)級(jí)(ji)同(tong)心(xin)式(shi)比(bi)較，不及(ji)二(er)級(jí)(ji)同(tong)心(xin)式(shi)動(dòng)(dong)作(zuo)靈敏(min)，規(guī)格(ge)相(xiang)同(tong)，行(xing)程相(xiang)同(tong)時(shí)(shi)，二(er)級(jí)(ji)同(tong)心(xin)結(jié)(jie)構(gòu)(gou)的通(tong)油(you)能(neng)力遠(yuǎn)(yuan)大於三(san)級(jí)(ji)同(tong)心(xin)結(jié)(jie)構(gòu)(gou)；二(er)級(jí)(ji)同(tong)心(xin)式(shi)控(kong)制壓(ya)力穩(wěn)定(ding)，加工(gong)工(gong)藝性(xing)好，二(er)級(jí)(ji)同(tong)心(xin)式(shi)應(yīng)(ying)用(yong)前(qian)景(jing)廣(guang)闊(kuo)，這(zhe)裏(li)以(yi)二(er)級(jí)(ji)同(tong)心(xin)結(jié)(jie)構(gòu)(gou)，討(tao)論(lun)其結(jié)(jie)構(gòu)(gou)尺(chi)寸(cun)設(shè)計(jì)方(fang)法(fa)．
VICKERS電(dian)磁(ci)閥(fa)出來(lái)(lai)的先導(dǎo)(dao)油(you)控(kong)制主(zhu)換(huan)向閥(fa)閥(fa)芯(xin)的移動(dòng)，使工作(zuo)泵的來(lái)油進(jìn)入動(dòng)臂(bi)油(you)缸(gang)實(shí)(shi)現(xiàn)(xian)動(dòng)臂(bi)上(shang)升(sheng)。比(bi)例(li)先(xian)導(dǎo)(dao)減(jian)壓(ya)閥(fa)的輸出壓(ya)力越(yue)大，控(kong)制主(zhu)換(huan)向閥(fa)閥(fa)芯(xin)的位移越(yue)大，主(zhu)換(huan)向閥(fa)通(tong)過(guò)的流(liu)量越(yue)大，動(dòng)(dong)臂(bi)上(shang)升(sheng)的速度越(yue)快。當(dāng)操作(zuo)手(shou)柄拉(la)限(xian)位置時(shí)，手(shou)柄中(zhong)的限位電(dian)磁(ci)鐵(tie)通(tong)電(dian)，手(shou)柄在(zai)極(ji)限位置被吸(xi)合(he)。動(dòng)臂(bi)以(yi)大的速度上(shang)升(sheng)，當(dāng)(dang)升(sheng)至(zhi)動(dòng)(dong)臂(bi)上(shang)位限位開(kāi)關(guān)(guan)所(suo)限定(ding)的位置時(shí)，操作(zuo)手(shou)柄限(xian)位電(dian)磁(ci)鐵(tie)斷(duan)電(dian)，手(shou)柄自動(dòng)(dong)恢復(fù)到(dao)中(zhong)位，動(dòng)臂(bi)就可(ke)保(bao)持(chi)在(zai)所(suo)限定(ding)的位置。在動(dòng)臂(bi)上(shang)升(sheng)的過(guò)程中，若需要?jiǎng)?dong)臂(bi)在(zai)某(mou)壹位置停(ting)留，則(ze)需將操(cao)作(zuo)手(shou)柄退回中位。
VICKERS電(dian)磁(ci)閥(fa)主(zhu)要用(yong)在電(dian)氣液(ye)壓(ya)伺(si)服(fu)系(xi)統(tǒng)(tong)中作(zuo)為執(zhí)(zhi)行(xing)元件(jian)(見(jiàn)液(ye)壓(ya)伺(si)服(fu)系(xi)統(tǒng)(tong))。在伺(si)服(fu)系(xi)統(tǒng)(tong)中，液(ye)壓(ya)執(zhí)(zhi)行(xing)機(jī)(ji)構(gòu)(gou)同(tong)電(dian)氣及(ji)氣動(dòng)執(zhí)(zhi)行(xing)機(jī)(ji)構(gòu)(gou)相(xiang)比(bi)，具(ju)有快速性(xing)好、單(dan)位重量輸出功(gong)率(lv)大、傳(chuan)動(dòng)平穩(wěn)、抗幹(gan)擾能(neng)力強(qiáng)(qiang)等(deng)特(te)點(diǎn)。另壹方面(mian)，在伺(si)服(fu)系(xi)統(tǒng)(tong)中傳(chuan)遞(di)信(xin)號(hào)和(he)校(xiao)正特(te)性(xing)時(shí)多用電(dian)氣元件(jian)。因此，現(xiàn)代高性(xing)能(neng)的伺(si)服(fu)系(xi)統(tǒng)(tong)也都(dou)采用電(dian)液(ye)方(fang)式(shi)，伺(si)服(fu)閥(fa)就是(shi)這(zhe)種系(xi)統(tǒng)(tong)的必需元件(jian)。
上壹篇 ATOS油缸(gang)CK/10系(xi)列(lie)如(ru)何預(yù)算機(jī)(ji)械(xie)壽(shou)命(ming)及(ji)診(zhen)斷(duan)故(gu)障 下(xia)壹篇 BURKERT寶德電(dian)磁(ci)流(liu)量計(jì)(ji)的故(gu)障檢(jian)修及(ji)日(ri)常(chang)維護(hù)(hu)
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