力士樂比例閥0811402003 DBETBX-1X/180G24-37Z4M
液壓伺服閥是閉環控制系統中重要的一種伺服控制元件，它能將微弱的電信號轉換成大功率的液壓信號（流量和壓力）。對整個系統來說，液壓伺服閥是信號轉換和功率放大元件；對系統中的液壓執行機構來說液壓伺服閥是控制元件；閥本身也是個多級放大的閉環電液伺服系統，提高了伺服閥的控制性能。
液壓比例閥工作原理
指令信號經比例放大器進行功率放大，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，從而實現對執行機構的位置或速度控制
在某些對位置或速度精度要求較高的應用場合，還可通過對執行機構的位移或速度檢測，構成閉環控制系統。
比例閥由直流比例電磁鐵與液壓閥兩部分組成，比例閥實現連續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，它們都是根據比例閥的控制需要開發出來的。
液壓比例閥的特點
1、電信號便于傳遞，能簡度單地實現遠距離控制。
2、能連續、按比例地控制液壓系統的壓力和流量，實現對執行答機構的位置、速度、力量的控制，并能減少壓力變換時的沖擊。
3、減少了元件數量，簡化了油路。同時電液比例閥的使用條件和保養與一般液壓元件相同，比伺服閥的抗污染性能強，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等系列大量供應專業代理經銷德國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
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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
有雜質使電磁閥的主閥芯和動鐵芯卡死→進行清洗，如有密封損壞應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→更換產品
二、電磁閥不能關閉
主閥芯或鐵動芯的密封件已損壞→更換密封件
流體溫度、粘度是否過高→更換對口的電磁閥
有雜質進入電磁閥產閥芯或動鐵芯→進行清洗
彈簧壽命已到或變形→更換
節流孔平衡孔堵塞→及時清洗
工作頻率太高或壽命已到→改選產品或更新產品
三、其它情況
內泄漏→檢查密封件是否損壞，彈簧是否裝配不良
外泄漏→連接處松動或密封件已壞→緊螺絲或更換密封件
通電時有噪聲→頭子上堅固件松動，擰緊。電壓波動不在允許范圍內，調整好電壓。鐵芯吸合面雜質或不平，及時清洗或更換。
現場快速判斷電磁閥好壞方法
