力士樂比例溢流閥DBEP6A06-13/45AG24K4V溢流閥一般有兩種結(jié)構(gòu)：1、直動型溢流閥 。2、先導式溢流閥。
對溢流閥的主要要求：調(diào)壓范圍大，調(diào)壓偏差小，壓力振擺小，動作靈敏，過載能力大，噪聲小。
1）電磁溢流閥原理上，一般是由先導式溢流閥加上一個2位2通電磁閥組成。
2）這個電磁閥實際上由兩部分組成：2位2通的液壓閥部分，加上一個電磁鐵。2位2通閥是開通，還是關(guān)閉，是由電磁鐵推動閥芯運動來實現(xiàn)的。像樓上朋友講的，有的閥電磁鐵通電時打開，有的閥電磁鐵斷電時打開，蘿目青菜個人各愛（根據(jù)系統(tǒng)要求選擇）。也就是說，電磁閥這里有一條通路一頭與先導溢流閥的某個部位相連，另一頭通過油管與油箱相連。通過操作電磁鐵可以讓先導溢流閥的某個部位或者與油箱相通，或者不與油箱相通。
3）先導溢流閥的主閥上腔壓力，是由先導閥加于控制的。如果先導閥正常工作，即主閥上腔有先導閥規(guī)定的壓力，則整個溢流閥就會在系統(tǒng)壓力到達調(diào)定壓力時其主閥口打開一定的開度，一方面能將系統(tǒng)多余流量流回油箱，另一方面又能維持系統(tǒng)的壓力為先導閥的調(diào)定值?？梢?，先導閥主要管壓力，主閥服從先導閥的領(lǐng)導，在先導閥動作時將主閥口開到合適大小，正好將多余流量流出去，又不影響系統(tǒng)壓力。
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