上海韋米機(jī)電設(shè)備有限公司

R900580972 ZDR10VA5-3X/200YM減壓閥 德國博世力士樂REXROTH減壓閥 壓力控制閥

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R900580972 ZDR10VA5-3X/200YM減壓閥

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

減壓閥

減壓閥是利用液流流過縫隙產(chǎn)生壓力損失，使其出口壓力低于進(jìn)口壓力的壓力控制閥。

按調(diào)節(jié)要求不同，有定值減壓閥，定差減壓閥，定比減壓閥。

定值減壓閥的結(jié)構(gòu)原理

減壓閥起減壓作用且保證出口壓力為定值的條件是:當(dāng)出口壓力大于減壓閥的調(diào)定壓力，使其先導(dǎo)閥開啟。

直動(dòng)式減壓閥

減壓閥的功用與特點(diǎn)：

減壓閥用在液壓系統(tǒng)中獲得壓力低于系統(tǒng)壓力的二次油路上

與溢流閥比較:

減壓閥是出口壓力控制，保證出口壓力為定值;溢流閥是進(jìn)口壓力控制，保證進(jìn)口壓力為定值。

減壓閥閥口常開;

溢流閥閥口常閉。

減壓閥有單獨(dú)的泄油口;溢流閥彈簧腔的泄漏油經(jīng)閥體

R900580972 ZDR10VA5-3X/200YM減壓閥

ZDR 型閥是一種直動(dòng)式減壓閥，采用夾層板設(shè)計(jì)，二次回路壓力限制。它用于降低系統(tǒng)壓力。

減壓閥主要包括外殼 (1)、控制閥芯 (2)、壓縮彈簧 (3)、調(diào)節(jié)型 (4) 和可選的止回閥。

次級壓力通過調(diào)節(jié)類型 (4) 進(jìn)行設(shè)置。

版本“A”

閥門在初始位置打開。液壓油可以不受限制地從通道 A? 流到通道 A?。通道 A? 中的壓力同時(shí)通過控制管路 (5) 施加到與壓縮彈簧 (3) 相對的活塞區(qū)域。如果通道 A? 中的壓力超過在壓縮彈簧 (3) 上設(shè)置的值，則控制閥芯 (2) 被推向壓縮彈簧 (3) 以控制位置并將通道 A? 中的設(shè)置壓力保持在恒定水平。

控制信號和先導(dǎo)油通過來自通道 A? 的控制管路 (5) 在內(nèi)部提供。

如果通道 A? 中的壓力由于執(zhí)行器上的外力作用而進(jìn)一步增加，它將進(jìn)一步推動(dòng)控制閥芯 (2) 抵抗壓縮彈簧 (3)。

這樣，通道 A? 通過控制閥芯 (2) 和外殼 (1) 處的控制邊緣 (9) 連接到油箱。如此多的液壓油被排放到油箱中，壓力不會(huì)進(jìn)一步增加。

從彈簧腔 (7) 排出的漏油始終通過孔 (6) 和通道 T (Y) 從外部實(shí)現(xiàn)。

壓力表連接 (8) 允許控制閥門處的二次壓力。

單向閥可用于從通道 A? 自由回流到 A? 版本“A”。

版本“P”和“B”

對于版本“P”，壓力降低在通道 P? 中實(shí)現(xiàn)�？刂菩盘柡拖葘�(dǎo)油由通道 P? 內(nèi)部提供。

對于版本“B”，通道 P? 中的壓力降低；但先導(dǎo)油是從通道 B 提取的。

注意：

如果方向閥處于閥芯位置 P 至 A，則通道 B 中的壓力不得超過設(shè)定的次級壓力。否則，通道 A 中存在壓力降低。

ZDR 6 型 DA1-4X/.YM…

R900580972 ZDR10VA5-3X/200YM減壓閥型號

力士樂先導(dǎo)式減壓閥ZDR 10 V

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力士樂先導(dǎo)式減壓閥ZDRK 10 V

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力士樂REXROTH先導(dǎo)式減壓閥DR(C)

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力士樂REXROTH先導(dǎo)式減壓閥DR

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換向閥主要由閥體、密封組件、凸輪、閥桿、手柄和閥蓋等零部件組成(圖1)。閥門由手柄驅(qū)動(dòng)，通過手柄帶動(dòng)閥桿與凸輪旋轉(zhuǎn)，凸輪具有定位驅(qū)動(dòng)與鎖定密封組件的開啟與關(guān)閉功能。手柄逆時(shí)針旋轉(zhuǎn)，兩組密封組件分別在凸輪的作用下關(guān)閉下端的兩個(gè)通道，上端的兩個(gè)通道分別與管道裝置的進(jìn)口相通。反之，上端的兩個(gè)通道關(guān)閉，下端兩個(gè)通道與管道裝置的進(jìn)口相通，實(shí)現(xiàn)了不停車換向。