液(ye)(ye)控伺(si)(si)服(fu)(fu)閥(fa)(fa)(fa)主(zhu)要是(shi)指電(dian)(dian)(dian)(dian)(dian)(dian)液(ye)(ye)伺(si)(si)服(fu)(fu)閥(fa)(fa)(fa),它在(zai)接受(shou)電(dian)(dian)(dian)(dian)(dian)(dian)氣模擬(ni)信(xin)(xin)號后，相應(ying)輸(shu)(shu)出(chu)調(diao)制的(de)(de)(de)流(liu)(liu)(liu)量和(he)(he)壓(ya)力(li)(li)。它既是(shi)電(dian)(dian)(dian)(dian)(dian)(dian)液(ye)(ye)轉(zhuan)(zhuan)(zhuan)換(huan)元(yuan)件(jian)，也(ye)(ye)是(shi)功率(lv)(lv)(lv)放大元(yuan)件(jian)，它能(neng)(neng)(neng)夠(gou)將小(xiao)功率(lv)(lv)(lv)的(de)(de)(de)微(wei)弱電(dian)(dian)(dian)(dian)(dian)(dian)氣輸(shu)(shu)入(ru)信(xin)(xin)號轉(zhuan)(zhuan)(zhuan)換(huan)為大功率(lv)(lv)(lv)的(de)(de)(de)液(ye)(ye)壓(ya)能(neng)(neng)(neng)（流(liu)(liu)(liu)量和(he)(he)壓(ya)力(li)(li)）輸(shu)(shu)出(chu)。在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)液(ye)(ye)伺(si)(si)服(fu)(fu)系(xi)(xi)統中(zhong)(zhong)，它將電(dian)(dian)(dian)(dian)(dian)(dian)氣部(bu)分(fen)與(yu)液(ye)(ye)壓(ya)部(bu)分(fen)連接起來，實現(xian)電(dian)(dian)(dian)(dian)(dian)(dian)液(ye)(ye)信(xin)(xin)號的(de)(de)(de)轉(zhuan)(zhuan)(zhuan)換(huan)與(yu)液(ye)(ye)壓(ya)放大。電(dian)(dian)(dian)(dian)(dian)(dian)液(ye)(ye)伺(si)(si)服(fu)(fu)閥(fa)(fa)(fa)是(shi)電(dian)(dian)(dian)(dian)(dian)(dian)液(ye)(ye)伺(si)(si)服(fu)(fu)系(xi)(xi)統控制的(de)(de)(de)核心(xin)。液(ye)(ye)控伺(si)(si)服(fu)(fu)閥(fa)(fa)(fa)是(shi)在(zai)伺(si)(si)服(fu)(fu)系(xi)(xi)統中(zhong)(zhong)將電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)號輸(shu)(shu)入(ru)轉(zhuan)(zhuan)(zhuan)換(huan)為功率(lv)(lv)(lv)較大的(de)(de)(de)壓(ya)力(li)(li)或(huo)流(liu)(liu)(liu)量壓(ya)力(li)(li)信(xin)(xin)號輸(shu)(shu)出(chu)的(de)(de)(de)執行元(yuan)件(jian)。它是(shi)一種(zhong)電(dian)(dian)(dian)(dian)(dian)(dian)液(ye)(ye)轉(zhuan)(zhuan)(zhuan)換(huan)和(he)(he)功率(lv)(lv)(lv)放大元(yuan)件(jian)。伺(si)(si)服(fu)(fu)閥(fa)(fa)(fa)的(de)(de)(de)靈敏度高(gao)，快速性好，能(neng)(neng)(neng)將很小(xiao)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)(xin)號（例如(ru)(ru)10毫安）轉(zhuan)(zhuan)(zhuan)換(huan)成很大的(de)(de)(de)液(ye)(ye)壓(ya)功率(lv)(lv)(lv)（如(ru)(ru)幾(ji)十(shi)匹馬力(li)(li)以上），可(ke)以驅動(dong)多種(zhong)類(lei)(lei)型的(de)(de)(de)負載(zai)。過(guo)去人們曾把(ba)噴(pen)(pen)(pen)嘴檔(dang)(dang)板閥(fa)(fa)(fa)、射流(liu)(liu)(liu)管或(huo)滑閥(fa)(fa)(fa)伺(si)(si)服(fu)(fu)馬達(da)等液(ye)(ye)壓(ya)放大裝置(zhi)都(dou)列入(ru)伺(si)(si)服(fu)(fu)閥(fa)(fa)(fa)范圍(wei)內(nei)。20世(shi)紀(ji)70年(nian)代以來，伺(si)(si)服(fu)(fu)閥(fa)(fa)(fa)一般(ban)僅指電(dian)(dian)(dian)(dian)(dian)(dian)液(ye)(ye)伺(si)(si)服(fu)(fu)閥(fa)(fa)(fa)。典型的(de)(de)(de)伺(si)(si)服(fu)(fu)閥(fa)(fa)(fa)由(you)永磁力(li)(li)矩馬達(da)、噴(pen)(pen)(pen)嘴、檔(dang)(dang)板、閥(fa)(fa)(fa)芯(xin)(xin)、閥(fa)(fa)(fa)套和(he)(he)控制腔(qiang)組成(見圖)。當輸(shu)(shu)入(ru)線圈(quan)通(tong)入(ru)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)時，檔(dang)(dang)板向右移(yi)動(dong)，使(shi)右邊(bian)噴(pen)(pen)(pen)嘴的(de)(de)(de)節流(liu)(liu)(liu)作用(yong)加強，流(liu)(liu)(liu)量減(jian)少，右側(ce)(ce)背(bei)壓(ya)上升；同(tong)時使(shi)左(zuo)邊(bian)噴(pen)(pen)(pen)嘴節流(liu)(liu)(liu)作用(yong)減(jian)小(xiao)，流(liu)(liu)(liu)量增加，左(zuo)側(ce)(ce)背(bei)壓(ya)下(xia)降。閥(fa)(fa)(fa)芯(xin)(xin)兩端的(de)(de)(de)作用(yong)力(li)(li)失去平衡, 閥(fa)(fa)(fa)芯(xin)(xin)遂(sui)向左(zuo)移(yi)動(dong)。高(gao)壓(ya)油(you)從S流(liu)(liu)(liu)向C2，送到負載(zai)。負載(zai)回油(you)通(tong)過(guo) C1流(liu)(liu)(liu)過(guo)回油(you)口，進入(ru)油(you)箱。閥(fa)(fa)(fa)芯(xin)(xin)的(de)(de)(de)位移(yi)量與(yu)力(li)(li)矩馬達(da)的(de)(de)(de)輸(shu)(shu)入(ru)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)成正比，作用(yong)在(zai)閥(fa)(fa)(fa)芯(xin)(xin)上的(de)(de)(de)液(ye)(ye)壓(ya)力(li)(li)與(yu)彈(dan)簧(huang)力(li)(li)相平衡，因(yin)此(ci)在(zai)平衡狀(zhuang)態(tai)下(xia)力(li)(li)矩馬達(da)的(de)(de)(de)差(cha)動(dong)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)與(yu)閥(fa)(fa)(fa)芯(xin)(xin)的(de)(de)(de)位移(yi)成正比。如(ru)(ru)果輸(shu)(shu)入(ru)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)反向，則(ze)流(liu)(liu)(liu)量也(ye)(ye)反向。表中(zhong)(zhong)是(shi)伺(si)(si)服(fu)(fu)閥(fa)(fa)(fa)的(de)(de)(de)分(fen)類(lei)(lei)。

電(dian)(dian)磁(ci)繼電(dian)(dian)器(qi)一般由(you)鐵(tie)(tie)(tie)(tie)(tie)芯、線(xian)(xian)圈、銜(xian)(xian)鐵(tie)(tie)(tie)(tie)(tie)、觸(chu)(chu)(chu)點(dian)簧等組成(cheng)的(de)(de)(de)。只要(yao)在(zai)線(xian)(xian)圈兩(liang)端加上一定(ding)的(de)(de)(de)電(dian)(dian)壓，線(xian)(xian)圈中就會流過(guo)一定(ding)的(de)(de)(de)電(dian)(dian)流，從(cong)而(er)產生電(dian)(dian)磁(ci)效應，銜(xian)(xian)鐵(tie)(tie)(tie)(tie)(tie)就會在(zai)電(dian)(dian)磁(ci)力(li)吸(xi)引的(de)(de)(de)作(zuo)(zuo)用(yong)下克服返回彈(dan)(dan)簧的(de)(de)(de)拉力(li)吸(xi)向鐵(tie)(tie)(tie)(tie)(tie)芯，從(cong)而(er)帶動(dong)(dong)(dong)銜(xian)(xian)鐵(tie)(tie)(tie)(tie)(tie)的(de)(de)(de)動(dong)(dong)(dong)觸(chu)(chu)(chu)點(dian)與(yu)靜(jing)觸(chu)(chu)(chu)點(dian)（常(chang)(chang)開(kai)(kai)觸(chu)(chu)(chu)點(dian)）吸(xi)合。當(dang)線(xian)(xian)圈斷電(dian)(dian)后(hou)，電(dian)(dian)磁(ci)的(de)(de)(de)吸(xi)力(li)也隨之消失，銜(xian)(xian)鐵(tie)(tie)(tie)(tie)(tie)就會在(zai)彈(dan)(dan)簧的(de)(de)(de)反作(zuo)(zuo)用(yong)力(li)返回原來(lai)的(de)(de)(de)位置，使(shi)動(dong)(dong)(dong)觸(chu)(chu)(chu)點(dian)與(yu)原來(lai)的(de)(de)(de)靜(jing)觸(chu)(chu)(chu)點(dian)（常(chang)(chang)閉(bi)觸(chu)(chu)(chu)點(dian)）釋(shi)(shi)放。這樣(yang)吸(xi)合、釋(shi)(shi)放，從(cong)而(er)達到了(le)在(zai)電(dian)(dian)路中的(de)(de)(de)導通(tong)(tong)、切斷的(de)(de)(de)目的(de)(de)(de)。對于(yu)(yu)繼電(dian)(dian)器(qi)的(de)(de)(de)“常(chang)(chang)開(kai)(kai)、常(chang)(chang)閉(bi)”觸(chu)(chu)(chu)點(dian)，可以這樣(yang)來(lai)區分：繼電(dian)(dian)器(qi)線(xian)(xian)圈未通(tong)(tong)電(dian)(dian)時(shi)(shi)處于(yu)(yu)斷開(kai)(kai)狀態(tai)的(de)(de)(de)靜(jing)觸(chu)(chu)(chu)點(dian)，稱為“常(chang)(chang)開(kai)(kai)觸(chu)(chu)(chu)點(dian)”；處于(yu)(yu)接通(tong)(tong)狀態(tai)的(de)(de)(de)靜(jing)觸(chu)(chu)(chu)點(dian)稱為“常(chang)(chang)閉(bi)觸(chu)(chu)(chu)點(dian)”。繼電(dian)(dian)器(qi)一般有兩(liang)股電(dian)(dian)路，為低壓控制(zhi)電(dian)(dian)路和高(gao)壓工作(zuo)(zuo)電(dian)(dian)路。當(dang)線(xian)(xian)圈通(tong)(tong)電(dian)(dian)（電(dian)(dian)壓規(gui)格(ge)有ac380v、ac220v或(huo)dc220v、dc24v等）時(shi)(shi)，銜(xian)(xian)鐵(tie)(tie)(tie)(tie)(tie)及托(tuo)板被鐵(tie)(tie)(tie)(tie)(tie)心吸(xi)引而(er)瞬時(shi)(shi)下移，使(shi)瞬時(shi)(shi)動(dong)(dong)(dong)作(zuo)(zuo)觸(chu)(chu)(chu)點(dian)接通(tong)(tong)或(huo)斷開(kai)(kai)。但(dan)是活(huo)(huo)塞(sai)桿(gan)和杠(gang)桿(gan)不能同時(shi)(shi)跟著銜(xian)(xian)鐵(tie)(tie)(tie)(tie)(tie)一起下落，因為活(huo)(huo)塞(sai)桿(gan)的(de)(de)(de)上端連著氣(qi)室(shi)中的(de)(de)(de)橡(xiang)皮膜(mo)，當(dang)活(huo)(huo)塞(sai)桿(gan)在(zai)釋(shi)(shi)放彈(dan)(dan)簧的(de)(de)(de)作(zuo)(zuo)用(yong)下開(kai)(kai)始向下運動(dong)(dong)(dong)時(shi)(shi)，橡(xiang)皮膜(mo)隨之向下凹，上面空氣(qi)室(shi)的(de)(de)(de)空氣(qi)變得(de)稀薄而(er)使(shi)活(huo)(huo)塞(sai)桿(gan)受到阻(zu)尼作(zuo)(zuo)用(yong)而(er)緩慢(man)下降。經過(guo)一定(ding)時(shi)(shi)間，活(huo)(huo)塞(sai)桿(gan)下降到一定(ding)位置，便通(tong)(tong)過(guo)杠(gang)桿(gan)推動(dong)(dong)(dong)延時(shi)(shi)觸(chu)(chu)(chu)點(dian)動(dong)(dong)(dong)作(zuo)(zuo)，使(shi)動(dong)(dong)(dong)斷觸(chu)(chu)(chu)點(dian)斷開(kai)(kai)，動(dong)(dong)(dong)合觸(chu)(chu)(chu)點(dian)閉(bi)合。從(cong)線(xian)(xian)圈通(tong)(tong)電(dian)(dian)到延時(shi)(shi)觸(chu)(chu)(chu)點(dian)完成(cheng)動(dong)(dong)(dong)作(zuo)(zuo)，這段時(shi)(shi)間就是繼電(dian)(dian)器(qi)的(de)(de)(de)延時(shi)(shi)時(shi)(shi)間。延時(shi)(shi)時(shi)(shi)間的(de)(de)(de)長短可以用(yong)螺釘調節空氣(qi)室(shi)進氣(qi)孔的(de)(de)(de)大小來(lai)改(gai)變。

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SCHUN機械配件AGE-XY-080-P0324481翊霈優供

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