DBW30B2-5X/200-6EG24N9K4液壓溢流閥

DBW30B2-5X/200-6EG24N9K4液壓溢流閥 德國博世力士樂REXROTH電磁溢流閥

DB 型閥主要是由先導閥和主閥組成。 DBW 型閥是由電磁換向閥、 先導閥和

主閥組成。

DB 型溢流閥：

A 腔的壓力油作用在主閥芯下端的同時，

通過阻尼器 、  和通道 、  、

 作用在主閥芯上端和先導閥 的錐 閥

上。 當系統(tǒng)壓力超過彈簧 的調(diào)定值時， 錐閥

 被打開。 同時主閥芯上端的壓力油通過阻尼

器 、 通道 、 彈簧腔 及通道

流回 B 腔（控制油內(nèi)排型） 或通過外排口

流回油箱（控制油外排型） 。 這樣， 當壓力油通過阻尼器 、  時在主閥

芯 上產(chǎn)生了一個壓力差， 主閥芯在這個壓差的作用下打開， 這樣在調(diào)定的

工作壓力下壓力油從 A 腔流到 B 腔（即卸荷） 。

DBW 型電磁溢流閥：

此閥工作原理與 DB 型閥相同， 只是可通過安裝在先導閥上的電磁換向閥 使系統(tǒng)在任意時刻卸荷。

DB/DBW 型閥均設有控制油內(nèi)部供油道 、  和內(nèi)部排油道 ；

控制油外供口 X 和外排口 Y。這樣就可根據(jù)控制油供給和排出的不同形式的組合

內(nèi)供內(nèi)排、 外供內(nèi)排、 內(nèi)供外排和外供外排 4 種型式。

液壓傳動系統(tǒng)的組成

1、液壓動力原件

將動力裝置的機械能轉換成為液壓能的裝置，其作用是為液壓傳動系統(tǒng)提供壓力油,是液壓傳動系統(tǒng)的動力源。例如液壓泵。

1.1液壓泵

液壓泵是液壓系統(tǒng)的動力元件，其作用是將原動機的機械能轉換成液體的壓力能,指液壓系統(tǒng)中的油泵，它向整個液壓系統(tǒng)提供動力。液壓泵的結構形式一般有齒輪泵、葉片泵和柱塞泵。

1.2齒輪泵

齒輪泵即依靠密封在個殼體中的兩個或兩個以上齒輪,在相互嚙合過程中所產(chǎn)生的工作空間容積變化來輸送液體的泵。齒輪泵的概念是很簡單的，即它的基本形式就是兩個尺寸相同的齒輪在一個緊密配合的殼體內(nèi)相互嚙合旋轉，這個殼體的內(nèi)部類似“8”字形，兩個齒輪裝在里面,齒輪的外徑及兩側與殼體緊密配合。來自于擠出機的物料在吸入口進入兩個齒輪中間，并充滿這一空間，隨著齒的旋轉沿殼體運動，后在兩齒嚙合時排出。

液壓溢流閥型號

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減壓閥可將閥前管路較高的液體壓力減少至閥后管路所需的水平。這里的傳輸介質主要是水。減壓閥廣泛用于高層建筑、城市給水管網(wǎng)水壓過高的區(qū)域、礦井及其他場合，以保證給水系統(tǒng)中各用水點獲得適當?shù)姆�務水壓和流量。鑒于水的漏失率和浪費程度幾乎同給水系統(tǒng)的水壓大小成正比，因此減壓閥具有改善系統(tǒng)運行工況和潛在節(jié)水作用，據(jù)統(tǒng)計其節(jié)水效果約為30%。