DBEM10-7X/200YG24K4M

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力士樂DBE(M)型比例溢流閥又比例先導閥，安全閥和插裝式主閥組成。比例先導閥控制主閥遙控口。力士樂DBE型比例溢流閥按輸入電流大小成比例地控制液壓系統(tǒng)的壓力，閥的通油能力大，適用于流量較大的液壓系統(tǒng)
　　力士樂DBE型比例溢流閥的系統(tǒng)壓力極限由比例電磁鐵2設定，與電流有關，來自系統(tǒng)的壓力作用于主閥芯4，與此同時，經過裝有節(jié)流孔5的先導管作用于主閥芯4的彈簧加載側并作用在先導閥芯6.如果系統(tǒng)壓力升高得超過對應著電磁鐵力的設定值，則先導閥芯6打開。
 　　現(xiàn)在先導油可以流回油箱，節(jié)流孔組產生作用在主閥芯4上的壓降，使它從閥座上升起并打開從泵到油箱的通路。
 　　力士樂DBEM行比例溢流閥為了保護系統(tǒng)免遭比例電磁鐵2處不能允許的高電流尖峰引起的不能允許的高壓之害，有一種供選方案是裝設一個彈簧加載的壓力溢流閥7提供zui高保護。
 　　力士樂DBE(M)型比例溢流閥由直流比例電磁鐵和先導型溢流閥組成。工作原理是：當輸入一個電信號時，比例電磁鐵1便產生一個相應的電磁力，它通過推桿2和彈簧3的作用，使錐閥4接觸在閥座5上，因此打開的液壓力與電流成正比，形成一個比例先導壓力閥?？譨為主閥閥芯6的阻尼孔，由先導式溢流閥工作原理，對溢流閥閥芯6上的受力分析可知，電液比例溢流閥進口壓力的高低與輸人信號電流的大小成正比，即進口油壓受輸入電磁鐵的電流大小控制。若輸入信號電流是連續(xù)地按比例地或按一定程序變化，則比例溢流閥所調節(jié)的液壓系統(tǒng)壓力，也連續(xù)地按比例地或按一定程序地進行變化。從而將手調溢流閥，改為電信號控制。
 　　力士樂DBE(M)型比例溢流閥實現(xiàn)多級壓力控制，當以不同電流J1、j2、J3、J4和J5輸入時，溢流閥就可得到五種壓力控制，它與普通溢流閥的多級壓力控制相比，液壓元件數(shù)量少，系統(tǒng)簡單。若輸入的是連續(xù)變化的信號則可實現(xiàn)連續(xù)的壓力控制。
 　　力士樂先導型比例溢流閥。它的先導部分是直鑫式比例壓力閥，可直接作為直鑫式比例溢流閥使用。若與普通壓力閥組合，可組成先導型比例溢流閥、比例減壓閥和比例順序閥等元件。

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Bosch DBEME 10-5X/50YG24K31M R900908585

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DBEM10-7X/200YG24K4M