更新時間:2023-03-10
訪問次數(shù):670
廠商性質(zhì):經(jīng)銷商
生產(chǎn)地址:德國
德國進口力士樂二級方向伺服閥,力士樂4WS(E)2EM... 型閥為電控制二級伺服方向閥,孔型符合DIN 24 340 A16 形。它們主要用於位置,力和速度控制閉環(huán)。這類閥由一個電機械轉(zhuǎn)換器(力矩馬達)(1),一個液壓放大器(噴嘴擋板原理)(2),一個閥套(第 2 級)內(nèi)的控制閥芯(3)組成,閥芯通過一機械反饋連接到力矩馬達上。
力士樂4WS(E)2EM16型四通方向伺服閥在力矩馬達的線圈(4)輸入一電信號,通過電樞的*磁鐵(5)產(chǎn)生一個力,這個力連到扭矩管(6)上產(chǎn)生一個扭矩,通過扭矩管(6)的連桿連接到擋板(7),使其離開兩噴嘴(8)之間的中心位置,這樣就導(dǎo)致一個壓力差,作用於控制閥芯的端面。壓力差使得閥芯移動,由此壓力腔連到一執(zhí)行器上,同時另一執(zhí)行器與回油腔連接。控制閥芯通過一反饋彈簧(機械反饋)(9)連到噴嘴擋板和力矩馬達上。控制閥芯不斷改變位置,直到反饋彈簧的反饋扭矩和力矩馬達的電磁轉(zhuǎn)矩相平衡,噴嘴擋板系統(tǒng)的壓差變?yōu)榱恪iy芯的行桯和通過先導(dǎo)控制閥的流量實現(xiàn)了閉環(huán)控制,與輸入電信號成正比。必須注意到,流量由閥的壓力差決定的。
外控電子放大器,型號 4WS2EM 16-2X/...(另行訂貨)外控電子放大器(伺服放大器),用於控制閥,將模擬輸入信號(控制量)放大,這使得輸出控制電流能夠驅(qū)動閥。內(nèi)置放大器,型號4WSE2EM16-2X/...和4WSE2ED16-2X/...電子放大器(10)用於模擬輸入信號的放大,與閥相配套。
它內(nèi)置於力矩馬達的蓋板內(nèi)。閥的零點位置通過一外部電位器進行調(diào)節(jié)。
4WSE2ED 16-2X/...
這類閥除了通過反饋彈簧的機械控制,還有閥芯位置電信號的採集和控制。閥芯位置通過一個感應(yīng)位移傳感器(11)獲得。通過內(nèi)置放大器(10),位移傳感器信號與給定值比較。任何可能的控制偏差進行電放大,作為一控制信號傳到力矩馬達上。有了這個附加的電反饋,由於電信號的閉環(huán)放大,使得在小信號範(fàn)圍內(nèi)有可能比機械式有更高的動態(tài)值。機械反饋保證了在電力供應(yīng)故障情況下閥芯位於零點。
這類閥只配置內(nèi)置放大器供貨。閥的零點可以通過外部電位計進行調(diào)節(jié)。
力士樂4WS(E)2EM16型四通二級方向伺服閥的全部型號如下所示:
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力士樂電液伺服閥
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力士樂4WS(E)2EM16型方向伺服閥的特征:用於閉環(huán)位置,力和速度的控制;二級伺服閥帶機械或機械與電反饋;*級是噴嘴擋板放大器 ;板式連接結(jié)構(gòu): 底板符合:DIN 24 340 A16 型,端口 X 和 Y 參考樣本 RC 45 054(另行訂貨);干扭矩馬達,磁隙間壓力油無污染;也可用作三通型閥;耐磨損閥芯反饋元件;三種控制方式; 控制:外控電路以歐洲制式或模塊式, (另行訂貨),或閥內(nèi)置電子放大器;閥和電子放大器已調(diào)整和測試;控制油油泵,不用拆閥可進行控制油內(nèi)外形式的供油、 回油切換;可互換控制閥套;*級的過濾可利用插頭外部進行。
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