產(chǎn)品詳情
武穴黎翔機電設(shè)備有限公司,詢價聯(lián)系人:何女士
詢價電話:0713-6542758,手機:18934630908
詢價傳真:0713-6542758
詢價QQ: 736567721,704552157
現(xiàn)貨特價型號:4WEH16E7X/6HG24N9ETK4/B10 2臺
一種是開關(guān)控制:要么全開、要么全關(guān),流量要么最大、要么最小,沒有中間狀態(tài),如普通的電磁直通閥、電磁換向閥、電液換向閥。另一種是連續(xù)控制:閥口可以根據(jù)需要打開任意一個開度,由此控制通過流量的大小,這類閥有手動控制的,如節(jié)流閥,也有電控的,如比例閥、伺服閥。
所以使用比例閥或伺服閥的目的就是:以電控方式實現(xiàn)對流量的節(jié)流控制(當(dāng)然經(jīng)過結(jié)構(gòu)上的改動也可實現(xiàn)壓力控制等),既然是節(jié)流控制,就必然有能量損失,伺服閥和其它閥不同的是,它的能量損失更大一些,因為它需要一定的流量來維持前置級控制油路的工作。
伺服閥的主閥一般來說和換向閥一樣是滑閥結(jié)構(gòu),只不過閥芯的換向不是靠電磁鐵來推動,而是靠前置級閥輸出的液壓力來推動,這一點和電液換向閥比較相似,只不過電液換向閥的前置級閥是電磁換向閥,而伺服閥的前置級閥是動態(tài)特性比較好的噴嘴擋板閥或射流管閥。
也就是說,伺服閥的主閥是靠前置級閥的輸出壓力來控制的,而前置級閥的壓力則來自于伺服閥的入口p,假如p口的壓力不足,前置級閥就不能輸出足夠的壓力來推動主閥芯動作。 R900407394Z2S10-1-3X/
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而我們知道,當(dāng)負(fù)載為零的時候,如果四通滑閥完全打開,p口壓力=t口壓力+閥口壓力損失(忽略油路上的其它壓力損失),如果閥口壓力損失很小,t口壓力又為零,那么p口的壓力就不足以供給前置級閥來推動主閥芯,整個伺服閥就失效了。所以伺服閥的閥口做得偏小,即使在閥口全開的情況下,也要有一定的壓力損失,來維持前置級閥的正常工作。CG2V-6GW-10
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疊加閥規(guī)格 02, DG4V-02-10 設(shè)計號, DGMR1 D02, DGMPC, DGMX2, DGMFN, DGMDC, DGMC, 250 bar (3600 psi) 30 l/min (7.9 USgpm) ISO/DIS 4401-02-02 樣本 中文
English
5018/C/1197/A
5018/EN/1197/A
SystemStak? 疊加閥:規(guī)格 3 (NG 6) 工業(yè)閥
產(chǎn)品說明 樣本類型 PDF 樣本編號
DGMR-3-50 平衡閥, 4401-03; NFPA-D03Service Line, 疊加閥 Valves 樣本 中文
English 5107.00/C/1197A
5107.00/EN/1197A
疊加閥, 規(guī)格 3, ISO 4401-03; NFPA-D03; 315 bar (4500 psi); 60 L/min (15.7 USgpm), DGMC D03, DGMX2 D03, DGMR D03 樣本 中文
English C-2027B
GB-2027B
SystemStak? 疊加閥:規(guī)格 5 (NG 10) 工業(yè)閥
產(chǎn)品說明 樣本類型 PDF 樣本編號
June 10, 2008ight="41" >疊加閥, 規(guī)格 5 (替換為 649 REV 11/97)", ISO 4401 -05 規(guī)格, 315 bar (4500 psi) 和 120 l/min (32 USgpm) 壓力溢流和減壓, 順序卸壓 樣本 中文
English 649-C