力士樂比例閥0811402003 DBETBX-1X/180G24-37Z4M
液壓伺服閥是閉環(huán)控制系統(tǒng)中重要的一種伺服控制元件，它能將微弱的電信號(hào)轉(zhuǎn)換成大功率的液壓信號(hào)（流量和壓力）。對(duì)整個(gè)系統(tǒng)來說，液壓伺服閥是信號(hào)轉(zhuǎn)換和功率放大元件；對(duì)系統(tǒng)中的液壓執(zhí)行機(jī)構(gòu)來說液壓伺服閥是控制元件；閥本身也是個(gè)多級(jí)放大的閉環(huán)電液伺服系統(tǒng)，提高了伺服閥的控制性能。
液壓比例閥工作原理
指令信號(hào)經(jīng)比例放大器進(jìn)行功率放大，并按比例輸出電流給比例閥的比例電磁鐵，比例電磁鐵輸出力并按比例移動(dòng)閥芯的位置，即可按比例控制液流的流量和改變液流的方向，從而實(shí)現(xiàn)對(duì)執(zhí)行機(jī)構(gòu)的位置或速度控制
在某些對(duì)位置或速度精度要求較高的應(yīng)用場(chǎng)合，還可通過對(duì)執(zhí)行機(jī)構(gòu)的位移或速度檢測(cè)，構(gòu)成閉環(huán)控制系統(tǒng)。
比例閥由直流比例電磁鐵與液壓閥兩部分組成，比例閥實(shí)現(xiàn)連續(xù)控制的核心是采用了比例電磁鐵，比例電磁鐵種類繁多，但工作原理基本相同，它們都是根據(jù)比例閥的控制需要開發(fā)出來的。
液壓比例閥的特點(diǎn)
1、電信號(hào)便于傳遞，能簡度單地實(shí)現(xiàn)遠(yuǎn)距離控制。
2、能連續(xù)、按比例地控制液壓系統(tǒng)的壓力和流量，實(shí)現(xiàn)對(duì)執(zhí)行答機(jī)構(gòu)的位置、速度、力量的控制，并能減少壓力變換時(shí)的沖擊。
3、減少了元件數(shù)量，簡化了油路。同時(shí)電液比例閥的使用條件和保養(yǎng)與一般液壓元件相同，比伺服閥的抗污染性能強(qiáng)，工作可靠。
REXROTH力士樂)液壓元件：
REXROTH柱塞泵A10VSO、REXROTH換向閥閥4WE、REXROTH溢流閥DBW、
REXROTH節(jié)流閥Z2S、REXROTH葉片泵PV7、REXROTH壓力繼電器HED、
BOSCH放大器比例閥0811、BOSCH齒輪泵0510等系列大量供應(yīng)專業(yè)代理經(jīng)銷德國BOSCH REXROTH(博世-力士樂)液壓元件：
REXROTH柱塞泵A10VSO、REXROTH換向閥閥4WE、REXROTH溢流閥DBW、
REXROTH節(jié)流閥Z2S、REXROTH葉片泵PV7、REXROTH壓力繼電器HED、
BOSCH放大器比例閥0811、BOSCH齒輪泵0510等系列大量供應(yīng)
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電磁閥故障與排除
一、電磁閥通電后不工作
檢查電源接線是否不良→重新接線和接插件的連接
檢查電源電壓是否在±工作范圍-→調(diào)致正常位置范圍
線圈是否脫焊→重新焊接
線圈短路→更換線圈
工作壓差是否不合適→調(diào)整壓差→或更換相稱的電磁閥
流體溫度過高→更換相稱的電磁閥
有雜質(zhì)使電磁閥的主閥芯和動(dòng)鐵芯卡死→進(jìn)行清洗，如有密封損壞應(yīng)更換密封并安裝過濾器
液體粘度太大，頻率太高和壽命已到→更換產(chǎn)品
二、電磁閥不能關(guān)閉
主閥芯或鐵動(dòng)芯的密封件已損壞→更換密封件
流體溫度、粘度是否過高→更換對(duì)口的電磁閥
有雜質(zhì)進(jìn)入電磁閥產(chǎn)閥芯或動(dòng)鐵芯→進(jìn)行清洗
彈簧壽命已到或變形→更換
節(jié)流孔平衡孔堵塞→及時(shí)清洗
工作頻率太高或壽命已到→改選產(chǎn)品或更新產(chǎn)品
三、其它情況
內(nèi)泄漏→檢查密封件是否損壞，彈簧是否裝配不良
外泄漏→連接處松動(dòng)或密封件已壞→緊螺絲或更換密封件
通電時(shí)有噪聲→頭子上堅(jiān)固件松動(dòng)，擰緊。電壓波動(dòng)不在允許范圍內(nèi)，調(diào)整好電壓。鐵芯吸合面雜質(zhì)或不平，及時(shí)清洗或更換。
現(xiàn)場(chǎng)快速判斷電磁閥好壞方法
