溢(yi)(yi)(yi)流(liu)閥(fa)是(shi)一種液壓壓力控制閥(fa)，在液壓設(she)備中主要(yao)起定壓溢(yi)(yi)(yi)流(liu)，穩(wen)壓，系統(tong)卸(xie)荷和安全保護作(zuo)用。溢(yi)(yi)(yi)流(liu)閥(fa)在裝(zhuang)配或使(shi)用中，由于(yu)O形密封圈(quan)、組合(he)密封圈(quan)的損壞，或者(zhe)安裝(zhuang)螺釘、管接(jie)頭的松(song)動，都可能造成不應有的外(wai)泄漏。

可提供機(ji)械(xie)壓(ya)力限(xian)制(zhi)(zhi)器，作為對抗高(gao)壓(ya)的保(bao)護。出(chu)于安全原因(yin)，出(chu)廠預調的機(ji)械(xie)壓(ya)力限(xian)制(zhi)(zhi)器是*卸載的（最小壓(ya)力）。調試(shi)時(shi)，壓(ya)力設定值必須稍(shao)微高(gao)于比(bi)例(li)控制(zhi)(zhi)的最大壓(ya)力調節值。按照以下步驟來設定機(ji)械(xie)壓(ya)力限(xian)制(zhi)(zhi)器的壓(ya)力：

·給(gei)放大(da)器(qi)(qi)提供(gong)最(zui)大(da)輸入參(can)考(kao)信號(hao)(hao)。系(xi)統(tong)壓(ya)力(li)將不(bu)會增(zeng)大(da)，直到(dao)機(ji)械壓(ya)力(li)限制器(qi)(qi)仍(reng)然處于卸荷狀(zhuang)態，順時針(zhen)旋轉(zhuan)(zhuan)調(diao)節螺母0直到(dao)系(xi)統(tong)壓(ya)力(li)增(zeng)加到(dao)一個穩定(ding)值，與(yu)最(zui)大(da)參(can)考(kao)輸入信號(hao)(hao)下壓(ya)力(li)設定(ding)值相對(dui)應顧時針(zhen)旋轉(zhuan)(zhuan)調(diao)節螺母0，再多旋轉(zhuan)(zhuan)1或2圈，確保(bao)在比例閥工作期間，機(ji)械壓(ya)力(li)限制器(qi)(qi)仍(reng)然關閉。

放(fang)(fang)大(da)(da)(da)(da)器(qi)使能(neng)需(xu)要在(zai)針(zhen)(zhen)腳C相對(dui)于(yu)針(zhen)(zhen)朗B輸(shu)(shu)入24VDC電(dian)(dian)(dian)源：使能(neng)輸(shu)(shu)入信(xin)(xin)號(hao)(hao)允許在(zai)不(bu)切(qie)斷(duan)到電(dian)(dian)(dian)子(zi)放(fang)(fang)大(da)(da)(da)(da)器(qi)電(dian)(dian)(dian)源的(de)情(qing)況下，可(ke)驅動電(dian)(dian)(dian)磁(ci)(ci)鐵(tie)(tie)工(gong)(gong)作(zuo)/停(ting)止(zhi)(zhi)電(dian)(dian)(dian)磁(ci)(ci)鐵(tie)(tie)工(gong)(gong)作(zuo)：當(dang)淘停(ting)止(zhi)(zhi)工(gong)(gong)作(zuo)時，放(fang)(fang)大(da)(da)(da)(da)器(qi)可(ke)保持通(tong)訊和其它的(de)功能(neng)。這不(bu)符(fu)合緊急情(qing)況下歐盟(meng)EN13849-1（ex EN954-1）。故障信(xin)(xin)號(hao)(hao)顯(xian)示放(fang)(fang)大(da)(da)(da)(da)器(qi)的(de)故障狀態(tai)（電(dian)(dian)(dian)磁(ci)(ci)鐵(tie)(tie)短路未連(lian)接(jie)(jie)，4-20mA輸(shu)(shu)入信(xin)(xin)號(hao)(hao)電(dian)(dian)(dian)纜(lan)斷(duan)線，等等）。故障狀態(tai)信(xin)(xin)號(hao)(hao)為(wei)OVDC，正常(chang)工(gong)(gong)作(zuo)信(xin)(xin)號(hao)(hao)為(wei)24VDc（針(zhen)(zhen)腳11對(dui)針(zhen)(zhen)腳2），故隨狀杰不(bu)受(shou)使能(neng)信(xin)(xin)號(hao)(hao)的(de)影響(xiang)。閥(fa)的(de)功能(neng)參數和配置(zhi)(zhi)，易于(yu)通(tong)過Alos*的(de)E-SW軟(ruan)件(jian)程(cheng)序(xu)設置(zhi)(zhi)和優(you)化，E-SW軟(ruan)件(jian)可(ke)通(tong)過USB接(jie)(jie)口(kou)(kou)連(lian)接(jie)(jie)到電(dian)(dian)(dian)子(zi)放(fang)(fang)大(da)(da)(da)(da)器(qi)上。對(dui)于(yu)現場總線型，當(dang)放(fang)(fang)大(da)(da)(da)(da)器(qi)通(tong)過總線接(jie)(jie)口(kou)(kou)連(lian)接(jie)(jie)到機器(qi)中(zhong)央單元時，軟(ruan)件(jian)通(tong)過連(lian)接(jie)(jie)USB接(jie)(jie)口(kou)(kou)對(dui)闊進(jin)行參數設置(zhi)(zhi)。

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