DBW10A2-52/200-6EG24N9K4力士樂溢流閥

DBW10A2-52/200-6EG24N9K4力士樂溢流閥 德國博世力士樂REXROTH溢流閥

性能

(1)調(diào)壓范圍：它是指減壓閥輸出壓力P2的可調(diào)范圍，在此范圍內(nèi)要求達(dá)到規(guī)定的精度。調(diào)壓范圍主要與調(diào)壓彈簧的剛度有關(guān)。

(2)壓力特性：它是指流量g為定值時(shí)，因輸入壓力波動(dòng)而引起輸出壓力波動(dòng)的特性。輸出壓力波動(dòng)越小，減壓閥的特性越好。輸出壓力必須低于輸入壓力—定值才基本上不隨輸入壓力變化而變化。

(3)流量特性：它是指輸入壓力—定時(shí)，輸出壓力隨輸出流量g的變化而變化的持性。當(dāng)流量g發(fā)生變化時(shí)，輸出壓力的變化越小越好。一般輸出壓力越低，它隨輸出流量的變化波動(dòng)就越小

DB 型閥是先導(dǎo)控制式的溢流閥； DBW 型閥是先導(dǎo)控制式的電磁溢閥。 DB

型閥是用來控制液壓系統(tǒng)的壓力； DBW 型閥也可以控制液壓系統(tǒng)的壓力， 并且

能在任意時(shí)刻使系統(tǒng)卸荷。

DB 型閥主要是由先導(dǎo)閥和主閥組成。 DBW 型閥是由電磁換向閥、 先導(dǎo)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(shí)，

通過阻尼器 、  和通道 、  、

 作用在主閥芯上端和先導(dǎo)閥 的錐 閥

上。 當(dāng)系統(tǒng)壓力超過彈簧 的調(diào)定值時(shí)， 錐閥

 被打開。 同時(shí)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(dāng)壓力油通過阻尼器 、  時(shí)在主閥

芯 上產(chǎn)生了一個(gè)壓力差， 主閥芯在這個(gè)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(dǎo)閥上的電磁換向閥

 使系統(tǒng)在任意時(shí)刻卸荷。

DB/DBW 型閥均設(shè)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。

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電磁線圈是通電產(chǎn)生電磁的一種裝置。在鐵芯的外部纏繞與其功率相匹配的導(dǎo)電繞組，這種通有電流的線圈像磁鐵一樣具有磁性，它也叫做電磁鐵（electromagnet）。我們通常把它制成條形或蹄形狀，以使鐵芯更加容易磁化。另外，為了使電磁鐵斷電立即消磁，我們往往采用消磁較快的的軟鐵或硅鋼材料來制做。這樣的電磁鐵在通電時(shí)有磁性，斷電后磁就隨之消失。