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2FRM10-3X/50L調(diào)速流量閥

發(fā)布日期:2024-10-24 來源:13524125780手機微信 作者:上海韋米

2FRM10-3X/50L調(diào)速流量閥 德國博世力士樂REXROTH單向閥 流量控制閥

我公司現(xiàn)貨供應(yīng)博世力士樂(BOSCH-REXROTH)、阿托斯ATOS、派克Parker、迪普馬DUPLOMATIC、油研YUKEN;本特利bentley、貝加萊B&R、西門子、光洋KOYO,美國ASCO,美國PARKER派克 等系列進(jìn)口產(chǎn)品 

2FRM10-3X/50L調(diào)速流量閥

流量控制閥

功用:通過改變閥口過流面積來調(diào)節(jié)輸出流量,從而控制執(zhí)行元件的運動速度。

分類:節(jié)流閥、調(diào)速閥、溫度補償調(diào)速閥、分流集流閥。

常用節(jié)流口結(jié)構(gòu)有錐形、三角槽形、矩形、三角形等。由節(jié)流方程知,當(dāng)壓力差.定時,改變開口面積即改變液阻就可改變流量。

節(jié)流閥實質(zhì)相當(dāng)于-一個可變節(jié)流口,借助控制機構(gòu)使閥芯相對于閥體孔運動改變閥口的過流面積。

結(jié)構(gòu)原理

主要零件有閥芯、閥體和螺母。閥體上右邊是進(jìn)油口,左邊是出油口。閥芯一端開有三角尖槽,另-端加工有螺紋,旋轉(zhuǎn)閥芯即可軸向移動改變閥口過流面積。為平衡液壓徑向力,三角槽須對稱布置。

調(diào)速閥定差減壓閥與節(jié)流閥串聯(lián)而成,用來調(diào)節(jié)通過的流量自動補

償負(fù)載變化的影響。

2FRM10-3X/50L調(diào)速流量閥

單向調(diào)速閥基本由以下部件構(gòu)成:殼體(1)、主提升閥(2)、先導(dǎo)部分(3)、先導(dǎo)滑閥(4)、阻尼滑閥(5)和先導(dǎo)阻尼閥(6)。

通過自由流動

將負(fù)載從 A 提升至 B 時,主滑閥(2)打開。如果負(fù)載壓力出現(xiàn)問題(如:方向閥與油口 A之間管路破裂),主滑閥(2)會立即關(guān)閉。將負(fù)載側(cè)(7)與彈簧腔8)連接起來,即可實現(xiàn)此功能。

降低負(fù)載(回路示例)

流動方向是從 B 流至 A。油口 A 通過方向閥連接到油箱。氣缸活塞桿側(cè)的流量與工況相對應(yīng)。油口 X 上的控制壓力與油口 B 上的負(fù)載壓力 之間的關(guān)系為= 1:20.

達(dá)到控制壓力時,主滑閥會提前打開。通過控制滑閥(4),將先導(dǎo)級(3)抬起,其底座和腔室(8)通過此鉆孔和油口 A 減壓到油箱中。同時,油口 B 內(nèi)的負(fù)載壓力不再施加到腔室(8)上,而是在主滑閥內(nèi)。主提升閥(2)上的負(fù)載因此被卸除。位于主提升閥(2)上的控制滑閥(4)的背面,抵靠在阻尼滑閥(5)軸環(huán)上。

油口 X 上用于開啟 B 到 A 所需的壓力此刻僅受腔室(9)內(nèi)的彈簧影響。用于開啟 B 到 A 連接所需的壓力為 20 bar;要完全開啟此連接,較大需要 70 bar 的壓力,具體情況視型號而定。

控制流量的開口橫截面逐漸增加。通過以下方式實現(xiàn):襯套和主提升閥(2)的徑向鉆孔依次打開。

控制壓力、破裂壓力和壓差之間的關(guān)系確定了通過 B 到 A的連接流入致動器的流量。因此,防止了致動器出現(xiàn)不受控制的情況。

即使方向閥與油口 A 之間出現(xiàn)管道破裂,也不會影響到下降程序的控制。

影響單向調(diào)速閥開啟和關(guān)閉時間的指導(dǎo)原則

通過位于控制滑閥(4)中以及阻尼滑閥(5)兩側(cè)的節(jié)流孔(6)調(diào)整開啟順序。節(jié)流孔(6)受篩網(wǎng)保護(hù)。

單向調(diào)速閥的關(guān)閉動作實際上是無節(jié)流的。

當(dāng)與氣缸結(jié)合使用時,連接到油口 X 的控制管路可裝配一個節(jié)流止回閥(出口節(jié)流控制),以控制關(guān)閉順序。

當(dāng)與馬達(dá)結(jié)合使用時,無需在連接到油口 X的控制管路中裝配節(jié)流止回閥。在這種情況下,建議對方向閥的控制時間進(jìn)行干預(yù)。

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平衡閥是一種特殊功能的閥門,閥門本身無特殊之處,只在于使用功能和場所有區(qū)別。 在某些行業(yè)中,由于介質(zhì)(各類可流動的物質(zhì))在管道或容器的各個部分存在較大的壓力差或流量差,為減小或平衡該差值,在相應(yīng)的管道或容器之間安設(shè)閥門,用以調(diào)節(jié)兩側(cè)壓力的相對平衡,或通過分流的方法達(dá)到流量的平衡,該閥門就叫平衡閥。