力士樂比例溢流閥DBE 10-3X/100YG24NZ4

力士樂比例溢流閥DBE 10-3X/100YG24NZ4

Rexroth力士樂比例溢流閥 力士樂DBE10比例閥

R900470222 DBE 10-3X/100XYG24Z4
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R900576604 DBE 10-3X=200YG24Z4-308
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R900704605 DBE 10-5X/350XYG24K4M
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R900435644 DBE 10G-3X/100YG12Z4
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0811402109 DBE 10X-1X/180G24-8NZ4M
0811402111 DBE 10X-1X/250G24-25NZ4M
0811402110 DBE 10X-1X/315G24-8NZ4M 
0811402108 DBE 10X-1X/80G24-8NZ4M

 節(jié)流閥工作原理詳解
節(jié)流閥是通過改變節(jié)流截面或節(jié)流長度以控制流體流量的閥門。將節(jié)流閥和單向閥并聯(lián)則可組合成單向節(jié)流閥。節(jié)流閥和單向節(jié)流閥是簡易的流量控制閥，在定量泵液壓系統(tǒng)中，節(jié)流閥和溢流閥配合，可組成三種節(jié)流調(diào)速系統(tǒng)，即進油路節(jié)流調(diào)速系統(tǒng)、回油路節(jié)流調(diào)速系統(tǒng)和旁路節(jié)流調(diào)速系統(tǒng)。節(jié)流閥沒有流量負反饋功能，不能補償由負載變化所造成的速度不穩(wěn)定，一般僅用于負載變化不大或對速度穩(wěn)定性要求不高的場合。
對節(jié)流閥的性能要求是：
•流量調(diào)節(jié)范圍大，流量一壓差變化平滑;
•內(nèi)泄漏量，若有外泄漏油口，外泄漏量也要;
•調(diào)節(jié)力矩，動作靈敏。
節(jié)流閥(throttle   valve)的外形結構與截止閥并無區(qū)別，只是它們啟閉件的形狀有所不同。節(jié)流閥的啟閉件大多為圓錐流線型，通過它改變通道截面積而達到調(diào)節(jié)流量和壓力。節(jié)流閥供在壓力降*的情況下作降低介質壓力之用。
介質在節(jié)流閥瓣和閥座之間流速很大，以致使這些零件表面很快損壞-即所謂汽蝕現(xiàn)象。為了盡量減少汽蝕影響，閥瓣采用耐汽蝕材料(合金鋼制造)并制成角為140～180的流線型圓錐體，這還能使閥瓣能有較大的開啟高度，一般不*在縫隙下節(jié)流。
節(jié)流閥具有以下特點：
1、構造較簡單，便于制造和維修，成本低。
2、調(diào)節(jié)精度不高，不能作調(diào)節(jié)使用。
3、密封面易沖蝕，不能作切斷介質用。
4、密封性較差。
調(diào)速閥
調(diào)速閥是進行了壓力補償?shù)墓?jié)流閥。它由定差減壓閥和節(jié)流閥串聯(lián)而成。
節(jié)流閥前、后的壓力分別引到減壓閥閥芯右、左兩端，當負載壓力增大，于是作用在減壓閥芯左端的液壓力增大，閥芯右移，減壓口加大，壓降減，從而使節(jié)流閥的壓差（p2-p3）保持不變；反之亦然。這樣就是調(diào)速閥的流量恒定不變（不受負載影響）。   
調(diào)速閥也可以設計成先節(jié)流后減壓的結構