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壓力繼電(dian)器(qi)是一(yi)種液電(dian)信(xin)號(hao)轉換(huan)元(yuan)(yuan)件。當控制油的壓力達到調定值時(shi),便觸動(dong)(dong)電(dian)氣(qi)開關(guan)(guan)發出(chu)電(dian)信(xin)號(hao),控制電(dian)氣(qi)元(yuan)(yuan)件(如電(dian)機、電(dian)磁鐵、電(dian)磁離合器(qi)等)動(dong)(dong)作,實(shi)現泵的加(jia)載或卸載、執行元(yuan)(yuan)件順(shun)序動(dong)(dong)作、系統(tong)安全保(bao)護和元(yuan)(yuan)件動(dong)(dong)作連鎖等。任何壓力繼電(dian)器(qi)都由壓力一(yi)位移轉換(huan)裝置和微動(dong)(dong)開關(guan)(guan)兩部分(fen)組成。按前者(zhe)的結(jie)構分(fen)為柱塞式(shi)、彈(dan)簧管式(shi)、膜片式(shi)和波紋管式(shi)4類,其(qi)中柱塞式(shi)常用。
壓力繼電器的主要性(xing)能:
(1)調壓范圍
壓力(li)繼電器能夠發出電信號的(de)zui工作壓力(li)和zui高工作壓力(li)的(de)范圍(wei)稱(cheng)為調壓范圍(wei)。
(2)靈敏(min)度與通斷(duan)調節區間(jian)
系(xi)(xi)統(tong)壓(ya)力(li)(li)(li)(li)升高(gao)到壓(ya)力(li)(li)(li)(li)繼電(dian)(dian)器(qi)的調定(ding)值(zhi)時(shi),壓(ya)力(li)(li)(li)(li)繼電(dian)(dian)器(qi)動作接通電(dian)(dian)信號的壓(ya)力(li)(li)(li)(li)稱為開啟(qi)壓(ya)力(li)(li)(li)(li);系(xi)(xi)統(tong)壓(ya)力(li)(li)(li)(li)降,壓(ya)力(li)(li)(li)(li)繼電(dian)(dian)器(qi)復(fu)位(wei)切斷(duan)電(dian)(dian)信號的壓(ya)力(li)(li)(li)(li)稱為閉(bi)(bi)合壓(ya)力(li)(li)(li)(li)。開啟(qi)壓(ya)力(li)(li)(li)(li)與(yu)閉(bi)(bi)合壓(ya)力(li)(li)(li)(li)的差(cha)值(zhi)稱為壓(ya)力(li)(li)(li)(li)繼電(dian)(dian)器(qi)的靈敏度。差(cha)值(zhi)小則(ze)靈敏度高(gao)。為避免系(xi)(xi)統(tong)壓(ya)力(li)(li)(li)(li)波動時(shi)壓(ya)力(li)(li)(li)(li)繼電(dian)(dian)器(qi)時(shi)通時(shi)斷(duan),要求開啟(qi)壓(ya)力(li)(li)(li)(li)與(yu)閉(bi)(bi)合壓(ya)力(li)(li)(li)(li)有定(ding)的差(cha)值(zhi),此(ci)差(cha)值(zhi)若可調,則(ze)稱為通斷(duan)調節區間。
(3)升壓或(huo)降壓動作(zuo)時間
壓力(li)(li)繼電(dian)器入口側壓力(li)(li)由卸荷壓力(li)(li)升至調定壓力(li)(li)時,微動開關(guan)觸(chu)點接通發出電(dian)信(xin)號(hao)的時間(jian)稱為升壓動作(zuo)時間(jian),反之,壓力(li)(li)下降,觸(chu)點斷開發出斷電(dian)信(xin)號(hao)的時間(jian)稱為降壓動作(zuo)時間(jian)。
(4)重復精度
在(zai)定(ding)的調定(ding)壓(ya)力下(xia),多(duo)次升(sheng)壓(ya)(或降壓(ya))過程中,開啟(qi)壓(ya)力或閉(bi)合壓(ya)力本身的差值稱為重(zhong)復(fu)精(jing)度(du),差值小則重(zhong)復(fu)精(jing)度(du)高。
HED7OH20/55K14KSV
HED7OH20/100K14KSV
HED7OH20/150K14KSV
HED 5 OP2-2X/50K14
HED 5 OP2-2X/210K14
HED 5 OP2-2X/350K14
HED 5 OP2-2X/630K14
HED8OA1X/50K14KW
HED8OA1X/200K14KW
HED8OA1X/200K14AS
HED8OA1X/50K14A
HED8OA1X/100K14A
HED8OA1X/350K14A
HED8OP1X/630K14
HED5OP1-2X/100K14
HED5OP1-2X/630K14
HED8OA1X/200K14A
HED5OA1-2X/350K14
HED8OP1X/630K14S
HED8OA1X/50K14AS
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