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日本SMC帶閥氣缸,smc自動(dòng)排水器,smc壓力開關(guān)說明書,KB00972誠信供應(yīng),大量庫存
SMC帶閥氣缸工作時(shí)，是利用彈簧的壓力來調(diào)節(jié)、控制液壓油的壓力大小。從圖3-50中可以看到：當(dāng)液壓油的壓力小于工作需要壓力時(shí)，閥芯被彈簧壓在液壓油的流入口，當(dāng)液壓油的壓力超過其工作允許壓力即大于彈簧壓力時(shí)，閥芯被液壓油頂起，液壓油流入，從圖示方向右側(cè)口流出，回油箱。液壓油的壓力越大，閥芯被液壓油頂起得越髙，液壓油經(jīng)溢流閥流回油箱的流量越大o如過液壓油的壓力小于或等于彈簧壓力，則閥芯落下，封住液壓油進(jìn)口。由于油泵輸出的液壓油壓力固定，而工作油缸用液壓油的壓力總要比油泵輸出液壓油壓力小，所以正常工作時(shí)總會(huì)有一些液壓油從溢流閥處流回油箱，以保持液壓油缸的工作壓力平衡、正常工作。由此可見，直動(dòng)式溢流閥的作用是能夠防止液壓系統(tǒng)中的液壓油壓力超出額定負(fù)荷，起安全保護(hù)作用。
SMC帶閥氣缸利用過程本身的壓力或壓差來驅(qū)動(dòng)控制閥動(dòng)作，也可用．溫包式檢測元件將溫度轉(zhuǎn)換為壓力，然后驅(qū)動(dòng)控制閥動(dòng)作。其特點(diǎn)是結(jié)構(gòu)簡單、操作方便，但會(huì)引起壓降，造成出口壓力的非線性，通常，穩(wěn)壓精度在10％一20％。帶指揮器作用的自力式控制閥可適用于小壓降和大流量的自力式控制場合，出口壓力變化范圍可小于設(shè)定壓力的10％。控制閥具有節(jié)能功能，因此，在一些控制要求不高的場合被廣泛應(yīng)用。自力式控制閥執(zhí)行機(jī)構(gòu)膜頭的輸入信號(hào)是控制閥前或閥后的壓力或閥兩端的壓差，或經(jīng)溫包轉(zhuǎn)換后的壓力信號(hào)。SMC單作用帶閥氣缸CVJ3B10-30S-5LZ
日本SMC帶閥氣缸,smc自動(dòng)排水器,smc壓力開關(guān)說明書,KB00972誠信供應(yīng),大量庫存
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化工儀器網(wǎng)