DR 30-5-5X/50YMV現貨減壓閥DR 30-5-5X/50YMV
【簡單介紹】
【詳細說明】
DR 30-5-5X/50YMV
武穴黎翔機電設備有限公司,詢價:何女士
詢價:,
詢價
詢價: 736567721,704552157
伺服閥的主閥一般來說和換向閥一樣是滑閥結構,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。
而我們知道,當負載為零的時候,如果四通滑閥*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。
伺服閥其實缺點極多:能耗浪費大、容易出故障、抗污染能力差、價格昂貴等等等等,好處只有一個:動態性能是所有液壓閥中zui高的。就憑著這一個優點,在很多對動態特性要求高的場合不得不使用伺服閥,如飛機火箭的舵機控制、汽輪機調速等等。動態要求低一點的,基本上都是比例閥的天下了。
一般說來,好像伺服系統都是閉環控制,比例多用于開環控制;其次比例閥類型要多,有比例壓力、流量控制閥等,控制比伺服要靈活一些。從他們內部結構看,伺服閥多是零遮蓋,比例閥則有一定的死區,控制精度要低,響應要慢。但從發展趨勢看,特別在比例方向流量控制閥和伺服閥方面,兩者性能差別逐漸在縮小,另外比例閥的成本比伺服閥要低許多,抗污染能力也強!
區別
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R900426202 ZDR 10 DB2-5X/25YM
R900967503 ZDR 10 DB2-5X/25YMV
R900431509 ZDR 10 DB2-5X/75YM
R900441887 ZDR 10 DB2-5X/75YMV
R900408340 ZDR 10 DB2-5X/150YM
R900570282 ZDR 10 DB2-5X/150YMV
R900443484 ZDR 10 DB2-5X/210YM
R900587565 ZDR 10 DB2-5X/210YMV
R900431392 ZDR 10 DB3-5X/25YM
R901029542 ZDR 10 DB3-5X/25YMV
R900472027 ZDR 10 DB3-5X/75YM
R900438729 ZDR 10 DB3-5X/75YMV
R900471974 ZDR 10 DB3-5X/150YM
R900935264 ZDR 10 DB3-5X/150YMV
R900519131 ZDR 10 DB3-5X/210YM
R900903756 ZDR 10 DB3-5X/210YMV
R900952406 ZDR 10 DB7-5X/75YM
R900925917 ZDR 10 DB7-5X/150YM
R900921263 ZDR 10 DB7-5X/210YM
R900967504 ZDR 10 DP1-5X/25YM
R900432179 ZDR 10 DP1-5X/25YMV
R900410877 ZDR 10 DP1-5X/75YM
R900450298 ZDR 10 DP1-5X/75YMV
R900411247 ZDR 10 DP1-5X/150YM
R900508341 ZDR 10 DP1-5X/150YMV
R900411246 ZDR 10 DP1-5X/210YM
R900550022 ZDR 10 DP1-5X/210YMV
R900410899 ZDR 10 DP2-5X/25YM
R900481889 ZDR 10 DP2-5X/25YMV
R900410875 ZDR 10 DP2-5X/75YM
R900429511 ZDR 10 DP2-5X/75YMV
R900410880 ZDR 10 DP2-5X/150YM
R900431772 ZDR 10 DP2-5X/150YMV
R900410876 ZDR 10 DP2-5X/210YM
R900487690 ZDR 10 DP2-5X/210YMV
R900481806 ZDR 10 DP3-5X/25YM
R900591106 ZDR 10 DP3-5X/25YMV
R900411255 ZDR 10 DP3-5X/75YM
R900423004 ZDR 10 DP3-5X/75YMV
R900493965 ZDR 10 DP3-5X/150YM
R900406329 ZDR 10 DP3-5X/150YMV
R900401090 ZDR 10 DP3-5X/210YM
R900520650 ZDR 10 DP3-5X/210YMV
R900948244 ZDR 10 DP7-5X/25YM
R901016846 ZDR 10 DP7-5X/25YMV
R900590407 ZDR 10 DP7-5X/75YM
R901003180 ZDR 10 DP7-5X/75YMV
R900431999 ZDR 10 DP7-5X/150YM
R900786712 ZDR 10 DP7-5X/150YMV
R900590408 ZDR 10 DP7-5X/210YM
R901048538 ZDR 10 DP7-5X/210YMV
R900704141 ZDR 10 VA4-3X/50YM
R900589381 ZDR 10 VA4-3X/50Y
R900905262 ZDR 10 VA4-3X/100YM
R900468829 ZDR 10 VA4-3X/100Y
R900922706 ZDR 10 VA4-3X/200YM
R900586156 ZDR 10 VA4-3X/200Y
R900442677 ZDR 10 VA4-3X/315YM
R900451501 ZDR 10 VA4-3X/315Y
R900501717 ZDR 10 VA4-3X/315YV
R900455274 ZDR 10 VA5-3X/50YM
R900436635 ZDR 10 VA5-3X/50YMV
R900434583 ZDR 10 VA5-3X/50Y
R900437011 ZDR 10 VA5-3X/50YV
R900471879 ZDR 10 VA5-3X/100YM
R900519325 ZDR 10 VA5-3X/100YMV
R900436537 ZDR 10 VA5-3X/100Y
R900437021 ZDR 10 VA5-3X/100YV
R900580972 ZDR 10 VA5-3X/200YM
R900975661 ZDR 10 VA5-3X/200YMV
R900444003 ZDR 10 VA5-3X/200Y
R900438181 ZDR 10 VA5-3X/200YV
R900562939 ZDR 10 VA5-3X/315YM
R900442678 ZDR 10 VA5-3X/315Y
R900562977 ZDR 10 VA5-3X/315YV
R900596713 ZDR 10 VA6-3X/50YM
R900425850 ZDR 10 VA6-3X/50Y
R900575449 ZDR 10 VA6-3X/50YV
R900977795 ZDR 10 VA6-3X/100YM
R900464323 ZDR 10 VA6-3X/100Y
R900440131 ZDR 10 VA6-3X/100YV
R900507902 ZDR 10 VA6-3X/200YMV
R900477640 ZDR 10 VA6-3X/200Y
R900594285 ZDR 10 VA6-3X/315Y
R901116713 ZDR 10 VA7-3X/50Y
R900512359 ZDR 10 VA7-3X/50YV
R900526682 ZDR 10 VA7-3X/100Y
R900463807 ZDR 10 VA7-3X/200Y
R900780007 ZDR 10 VA7-3X/315Y
R901017378 ZDR 10 VB4-3X/50YM
R900704143 ZDR 10 VB4-3X/50Y
R900905263 ZDR 10 VB4-3X/100YM
R900512622 ZDR 10 VB4-3X/100Y
R900537560 ZDR 10 VB4-3X/100YV
R900944037 ZDR 10 VB4-3X/200YM
R900525462 ZDR 10 VB4-3X/200Y
R900512307 ZDR 10 VB4-3X/200YV
R900513525 ZDR 10 VB4-3X/315Y
R900507733 ZDR 10 VB5-3X/50YM
R900587413 ZDR 10 VB5-3X/50Y
R900565403 ZDR 10 VB5-3X/50YV
R900518186 ZDR 10 VB5-3X/100YM
R900509786 ZDR 10 VB5-3X/100YMV
R900457022 ZDR 10 VB5-3X/100Y
R900512358 ZDR 10 VB5-3X/100YV
R900506201 ZDR 10 VB5-3X/200YM
R900538790 ZDR 10 VB5-3X/200YMV
R900462912 ZDR 10 VB5-3X/200Y
R900513691 ZDR 10 VB5-3X/200YV
R900562940 ZDR 10 VB5-3X/315YM
R900469405 ZDR 10 VB5-3X/315YMV
伺服閥與比例閥的區別
伺服閥與比例閥之間的差別并沒有嚴格的規定,因為比例閥的性能越來越好,逐漸向伺服閥靠近,所以近些年出現了比例伺服閥。
比例閥和伺服閥的區別主要體現在以下幾點:
1.驅動裝置不同。比例閥的驅動裝置是比例電磁鐵;伺服閥的驅動裝置是力馬達或力矩馬達;
2.性能參數不同。滯環、中位死區、頻寬、過濾精度等特性不同,因此應用場合不同,伺服閥和伺服比例閥主要應用在閉環控制系統,其它結構的比例閥主要應用在開環控系統及閉環速度控制系統;
2.1 伺服閥中位沒有死區,比例閥有中位死區;直接作用式調節閥又稱為彈簧負載式調節閥,其結構內有彈性元件:如彈簧、波紋管、波紋管式的溫包等,利用彈性力與反饋信號平衡的原理。
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