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力士樂(lè)溢流閥DBW10A1-5X/200-6EG24N9K4 R900941174現(xiàn)貨

REXROTH力士樂(lè)電磁溢流閥DBW10A1-5X/200-6EG24N9K4 R900941174 原裝我公司主營(yíng)液壓氣動(dòng)元件、工控備件！力士樂(lè)溢流閥DBW10A1-5X/200-6EG24N9K4 R900941174現(xiàn)貨

溢流閥是一種液壓壓力控制閥，在液壓設(shè)備中主要起定壓溢流作用，穩(wěn)壓，系統(tǒng)卸荷和保護(hù)作用。定壓溢流作用：在定量泵節(jié)流調(diào)節(jié)系統(tǒng)中，定量泵提供的是恒定流量。當(dāng)系統(tǒng)壓力增大時(shí)，會(huì)使流量需求減小。此時(shí)溢流閥開(kāi)啟，使多余流量溢回油箱，保證溢流閥進(jìn)口壓力，即泵出口壓力恒定（閥口常隨壓力波動(dòng)開(kāi)啟）。穩(wěn)壓作用：溢流閥串聯(lián)在回油路上，溢流閥產(chǎn)生背壓，運(yùn)動(dòng)部件平穩(wěn)性增加。系統(tǒng)卸荷作用：在溢流閥的遙控口串接溢小流量的電磁閥，當(dāng)電磁鐵通電時(shí)，溢流閥的遙控口通油箱，此時(shí)液壓泵卸荷。溢流閥此時(shí)作為卸荷閥使用。保護(hù)作用：系統(tǒng)正常工作時(shí)，閥門(mén)關(guān)閉。只有負(fù)載超過(guò)規(guī)定的（系統(tǒng)壓力超過(guò)調(diào)定壓力）時(shí)開(kāi)啟溢流，進(jìn)行過(guò)載保護(hù)，使系統(tǒng)壓力不再增加（通常使溢流閥的調(diào)定壓力比系統(tǒng)工作壓力高10%～20%）。實(shí)際應(yīng)用中一般有：作卸荷閥用，作遠(yuǎn)程調(diào)壓閥，作高低壓多級(jí)控制閥，作順序閥，用于產(chǎn)生背壓（串在回油路上）。溢流閥一般有兩種結(jié)構(gòu)：1、直動(dòng)型溢流閥 。2、先導(dǎo)式溢流閥。對(duì)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(dòng)作靈敏，過(guò)載能力大，噪聲小。

溢流閥的工作原理主要基于壓力平衡和機(jī)械傳動(dòng)原理，通過(guò)外部壓力的變化來(lái)實(shí)現(xiàn)液壓系統(tǒng)中流量的調(diào)節(jié)。以下是詳細(xì)介紹：

溢流閥主要由閥體、閥芯、彈簧和調(diào)節(jié)裝置組成。閥體上設(shè)有進(jìn)口和出口通道以及溢流口當(dāng)液壓系統(tǒng)的工作壓力超過(guò)溢流閥設(shè)定的壓力時(shí)，閥芯受到壓力作用向上移動(dòng)，使溢流口從口通道中插入，形成溢流通道，允許流體流出，從而穩(wěn)定系統(tǒng)壓力。當(dāng)系統(tǒng)壓力降低到設(shè)定壓力范圍內(nèi)時(shí)，閥芯在彈簧作用下向下移動(dòng)，關(guān)閉溢流通道，阻止流體繼續(xù)溢流。先導(dǎo)式溢流閥由先導(dǎo)閥和主閥組成，先導(dǎo)閥控制壓力，主閥控制流量。當(dāng)進(jìn)口壓力超過(guò)調(diào)壓力時(shí)，先導(dǎo)閥打開(kāi)，主閥內(nèi)油液產(chǎn)生流動(dòng)，實(shí)現(xiàn)溢流。直動(dòng)式比例溢流閥利用比例電磁鐵產(chǎn)生的吸力與彈簧力和系統(tǒng)壓力作用在閥芯上的力平衡的

原理來(lái)工作。通過(guò)調(diào)整通入電磁鐵的電流大小，可以改變調(diào)壓閥的調(diào)節(jié)壓力

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