DBW10B1-52/200-6EG24N9K4直動式溢流閥

DBW10B1-52/200-6EG24N9K4直動式溢流閥

溢流閥

類型:直動式、先導(dǎo)式

作用:

(1)在不斷溢流過程中保持系統(tǒng)壓力恒定，起穩(wěn)壓和溢流作用(p,FP

系統(tǒng)’閥口常開) ;

(2)防止液壓系統(tǒng)過載，起安全保護(hù)作用(p,=1.1~1.2p,max，閥口常閉)

(一)溢流閥的基本結(jié)構(gòu)及其工作原理

1、直動式溢流閥

工作原理:

直接利用液壓力與彈簧力相平衡以控制閥芯的啟閉動作，從而保證進(jìn)油口壓力基本恒定。

特點(diǎn):

①閥芯所受的液壓力全靠彈簧力平衡，故當(dāng)系統(tǒng)壓力很高時，彈簧必須很硬，導(dǎo)致結(jié)構(gòu)笨重，調(diào)壓不輕便。一般用于壓力小于2.5MPa的低壓系統(tǒng)中，作安全閥或背壓閥使用。

②由于慣性或負(fù)載的變化，導(dǎo)致q、變化，即開口度h的變化，由于k很大，所以p不穩(wěn)定，穩(wěn)壓精度差;

③結(jié)構(gòu)簡單、便宜，但工作時易產(chǎn)生振動和噪音。

 

1）電磁溢流閥原理上，一般是由先導(dǎo)式溢流閥加上一個2位2通電磁閥組成。

2）這個電磁閥實(shí)際上由兩部分組成：2位2通的液壓閥部分，加上一個電磁鐵。2位2通閥是開通，還是關(guān)閉，是由電磁鐵推動閥芯運(yùn)動來實(shí)現(xiàn)的。有的閥電磁鐵通電時打開，有的閥電磁鐵斷電時打開，蘿目青菜個人各愛（根據(jù)系統(tǒng)要求選擇）。也就是說，電磁閥這里有一條通路一頭與先導(dǎo)溢流閥的某個部位相連，另一頭通過油管與油箱相連。通過操作電磁鐵可以讓先導(dǎo)溢流閥的某個部位或者與油箱相通，或者不與油箱相通。

溢流閥型號

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電磁閥在使用時常常還希望它兼具手動功能，作為停電或故障時備用。

一般手動裝置只能手動開閥或手動關(guān)閥，二者齊備的稱完全手動。手動裝置還能對閥門開度進(jìn)行預(yù)置，一般手動只能對閥的較大或較小開度進(jìn)行預(yù)置，而完全手動能分別對較大或較小開度進(jìn)行預(yù)置。ZDF多功能電磁閥屬完全手動類。其它型號電磁閥根據(jù)需要可帶簡單的一般手動裝置。