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德國西門子SIEMENS閥位傳送器/C73541-A430 -D78

閥位傳送器與各類調(diào)節(jié)閥配套使用，顧名思義閥位傳送器就是用以將調(diào)節(jié)閥的位移變化，轉(zhuǎn)換成相對應(yīng)的氣動模擬信號或電流信號，從而使操作人員在控制室就能了解現(xiàn)場情況。實(shí)際上，閥位傳送器是調(diào)節(jié)閥形程輸出的反饋裝置，可以廣泛應(yīng)用于遠(yuǎn)距離操作及重要的自控回路中，監(jiān)測調(diào)節(jié)閥的形程狀況。

德國西門子SIEMENS閥位傳送器/C73541-A430 -D78
　　其中，氣動閥位傳送器動作原理：當(dāng)執(zhí)行機(jī)構(gòu)接受氣動信號時，執(zhí)行機(jī)構(gòu)動作。檔桿與執(zhí)行機(jī)構(gòu)的推桿相連接，并帶動傳送器的轉(zhuǎn)軸使凸輪轉(zhuǎn)動，副杠桿向下轉(zhuǎn)動，拉伸彈簧的拉力減小，此時主杠桿繞支點(diǎn)轉(zhuǎn)動，使擋板靠近噴嘴，放大器的背壓增加，推動滑閥左移，氣源壓力經(jīng)放大器滑閥進(jìn)入氣路。一路輸入到閥位顯示儀表，另一路輸入到反饋波紋管，對主杠桿產(chǎn)生推力。當(dāng)這個力對支點(diǎn)的作用力矩，與彈簧的拉伸力對支點(diǎn)的作用力矩相等時，達(dá)到平衡狀態(tài)，閥位傳送器已將閥門行程轉(zhuǎn)換為對應(yīng)的輸出壓力

德國西門子SIEMENS閥位傳送器/C73541-A430 -D78

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