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REXROTH溢流閥ZDB6VP1-4X/200V 德國博世力士樂REXROTH溢流閥 直動(dòng)式溢流閥

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REXROTH溢流閥ZDB6VP1-4X/200V

溢流閥

類型:直動(dòng)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(dòng)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(dòng)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(shí)，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(shí)易產(chǎn)生振動(dòng)和噪音。

溢流閥是壓力控制閥。其作用主要是控制系統(tǒng)壓力，以保護(hù)油泵和油路系統(tǒng)的安全及保持油路系統(tǒng)的壓力恒定。通經(jīng)為8毫米的溢流閥是一個(gè)小型的直接動(dòng)作的溢流閥，可以和主溢流閥的遙控口連接，對主溢流閥實(shí)現(xiàn)遠(yuǎn)程壓力調(diào)節(jié)。溢流閥的遙控口經(jīng)換向閥和油箱連接時(shí)，可使油路卸荷。此時(shí)溢流閥起卸荷作用。溢流閥的遙控口串聯(lián)換向閥和通經(jīng)為8毫米的溢流閥時(shí)，可實(shí)現(xiàn)壓力的多級控制。

REXROTH溢流閥ZDB6VP1-4X/200V

DB 型壓力閥是一種先導(dǎo)式溢流閥。用于限制工作壓力。

這些溢流閥 (DB) 主要由帶主閥心 (3) 的主閥 (1) 以及帶壓力調(diào)節(jié)元件的先導(dǎo)控制閥 (2) 組成。

施加在通道 P 中的壓力作用于主閥芯 (3)。同時(shí)，該壓力通過配有噴嘴 (4) 和 (5) 的控制油路 (6) 和 (7) 施加于主閥芯 (3) 的彈簧負(fù)載側(cè)和先導(dǎo)控制閥 (2) 中的滾珠 (8)。如果通道 P 中的壓力超過彈簧 (9) 上設(shè)定的值，則滾珠 (8) 將背向彈簧 (9) 打開。相應(yīng)的信號通過控制油路 (10) 和 (6) 從通道 P 由內(nèi)部傳出。此時(shí)主閥芯 (3) 彈簧負(fù)載側(cè)的液壓油通過控制油路 (7)、噴嘴孔 (11) 和滾珠 (8) 流入彈簧腔 (12)。從此處，液壓油通過控制油路 (13) 從內(nèi)部流入油箱（對于型號 DB …），或通過控制油路 (14) 從外部流入油箱（對于型號 DB …Y）。噴嘴 (4) 和 (5) 會(huì)導(dǎo)致主閥芯 (3) 出現(xiàn)壓降，從而使通道 P 到通道 T 的連接打開�，F(xiàn)在，液壓油從通道 P 流到通道 T，同時(shí)維持設(shè)定的工作壓力。

溢流閥可通過油口“X”(15) 卸載或切換為另一壓力（第二個(gè)壓力等級）。

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R901136399 ZDB10VP3-4X/80V

R900441130 ZDB10VP7-4X/100

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R900580733 ZDB10VP7-4X/200

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R900565406 ZDB10VP7-4X/315

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R900967921 ZDB10VT1-4X/315

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R900967530 ZDB10VT1-4X/50

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R900967533 ZDB10VT2-4X/100

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R900967924 ZDB10VT2-4X/315

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R900428936 ZDB10VT2-4X/50

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R900435816 ZDB10VT2-4X/50VSO30

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R978854311 ZDB10VP2-4X/200VSO43A-481

力士樂REXROTH先導(dǎo)式溢流閥DB.K

R901133623 DB10K1-4X/100-40YV

R901175318 DB10K1-4X/100-90YV

R900511013 DB10K1-4X/100Y

R900594111 DB10K1-4X/100YV

R900425806 DB10K1-4X/200Y

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R900443353 DB10K1-4X/315Y

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R901040419 DB10K2-4X/100-030Y

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R910925828 PRESSRELIEFVALVE DB10K2-4X/100YVR&

R902400972 PRESSRELIEFVALVE DB10K2-4X/200YVR&

力士樂先導(dǎo)式溢流閥DB(C/T)

R900502910 DB10G.-5X/...

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安全閥是啟閉件受外力作用下處于常閉狀態(tài)，當(dāng)設(shè)備或管道內(nèi)的介質(zhì)壓力升高超過規(guī)定值時(shí)，通過向系統(tǒng)外排放介質(zhì)來防止管道或設(shè)備內(nèi)介質(zhì)壓力超過規(guī)定數(shù)值的特殊閥門。安全閥屬于自動(dòng)閥類，主要用于鍋爐、壓力容器和管道上，控制壓力不超過規(guī)定值，對人身安全和設(shè)備運(yùn)行起重要保護(hù)作用。