一种是开关控制:要么全开、要么全关,流量要么*大、要么*小,没有中间状态,如普通的电磁直通阀、电磁换向阀、电液换向阀。
另一种是连续控制:阀口可以根据需要打开任意一个开度,由此控制通过流量的大小,这类阀有手动控制的,如节流阀,也有电控的,如比例阀、伺服阀。 026-30408-0 4D03 3408 0705 60B1 S3欢迎您的询价!
026-30409-0 4D03 3408 0705 50B1
026-30501-H 4D03 3B03 0303 10C5G0Q 15
026-30527-H 4D03 3A07 06SA 40C1G0Q 15
026-30557-H 4D03 3A11 0103 40C1G0Q
026-30589-W 4D03 3A03 0603 20C1W52
026-37026-D 4D03 3A11 0103 40C1G0D 15J8
026-37032-H 4D02 VB08 0303 30B1G0Q 10
026-37033-H 4D03 3A03 0603 40C1G0Q 15V9W1
026-37035-H 4D03 3A03 1113 40C1G0Q 15V9W1
026-37071-B 4D03 3B07 0303 24C1W30
026-37088-H 4D02 VBBT 0303 12B1G0Q 06
026-37425-H 4D03 3A01 0603 14C1G0Q
026-37544-H 4D03 3A51 0203 20C1G0Q 15
026-38285-H 4D03 3C03 0403 10C1GOQ
026-38286-H 4D03 3B02 0303 10C1G0Q
026-38455-H 4D03 3A01 0603 14C1G0Q 15
026-38488-H 4D03 3A09 0603 10C1G0Q 15
026-38855-H 4D03 3B03 0303 42C1G0Q 15
026-38866-H 4D03 3B55 0303 10C5G0Q
026-39091-H 4D03 3B55 0303 40C1G0Q 15
026-39098-H 4D03 3B10 0303 42C1G0Q 15
026-39103-0 4D02 V051 0103 00A1
026-39104-0 4D02 V051 0203 00A1
所以使用比例阀或伺服阀的目的就是:以电控方式实现对流量的节流控制(当然经过结构上的改动也可实现压力控制等),既然是节流控制,就必然有能量损失,伺服阀和其它阀不同的是,它的能量损失更大一些,因为它需要一定的流量来维持前置级控制油路的工作。欢迎您的询价0811405109 VT-MNE1-5-1X/V0/0
0811405108 VT-SWMA3-5-1X/V0/0
0811405107 VT-SWMA2-5-1X/V0/0
0811405106 VT-MSPA2-525-10/V0
0811405105 VT-SWMA1-5-1X/V0/0
0811405104 VT-VRPA1-537-10/V0/QV-RTP
0811405103 VT-VRPA1-527-10/V0/QV-RTP
0811405099 VT-VRPA1-537-10/V0/QV
0811405098 VT-VRPA1-527-10/V0/QV
0811405094 VT-SWKA2-5-1X/V0/0
0811405093 VT-SWKA1-5-1X/V0/0
0811405090 VT-VPRAS1-527-10/V0
0811405088 VT-VARAP1-527-10/V0/3/2VAX
0811405087 VT-VARAP1-527-10/V0/2STV
0811405086 VT-VARAP1-537-10/V0/5/3V
0811405085 VT-VARAP1-537-10/V0
0811405084 VT-VARAP1-527-10/V0
0811405083 VT-KRRA2-527-20/V0/2CH
0811405082 VT-KRRA2-537-20/V0/
0811405081 VT-VSPA1-508-10/V0/RTP
0811405080 VT-VSPA2-525-10/V0/RTP
伺服阀的主阀一般来说和换向阀一样是滑阀结构,只不过阀芯的换向不是靠电磁铁来推动,而是靠前置级阀输出的液压力来推动,这一点和电液换向阀比较相似,只不过电液换向阀的前置级阀是电磁换向阀,而伺服阀的前置级阀是动态特性比较好的喷嘴挡板阀或射流管阀。 DG18V32ALB60 02-339196
DG17V32N60
02-351067 VVP125RRM30CBK10
565590 NV110K0
565936 NV110R0
KDG5V733C170NTMUH110 02-332758
DGMPC3ABKBAK41 694400
DGMC5BTAWB30
DG17V32N60
DGMPC5ABKBAK30 867364
DGMFN3YA2WB2W41
DGMPC3ABKBAK41 694400
DGMFN5XP2W30
DG4V36CMUH760
02-350228 KDG5V733C170NMUH110
02-157450 KDG4V333C30MUH760
GHP1-D-4-CO-E
KBDG5V52C90NXHM1PE7H110 02-351169
02-362429 DG17V4012A10
KFDG4V333C20NZMU1H720 565383
DGMPC5ABKBAK30 867364
PCGV6A110 615042
DG3VP3102AVMUH10
DG5V72N2TMUH730
也就是说,伺服阀的主阀是靠前置级阀的输出压力来控制的,而前置级阀的压力则来自于伺服阀的入口p,假如p口的压力不足,前置级阀就不能输出足够的压力来推动主阀芯动作欢迎您的询价!0811405148 VT-VRRA1-527-10/V0/RV
0811405147 VT-VACAF-500-10/V0
0811405146 VT-VNE1-5-1X/V0/0
0811405145 VT-SSPA1-525-20/V0/I
0811405144 VT-SSPA1-508-20/V0
0811405143 VT-SSPA1-525-20/V0
0811405141 VT-KACAB-500-10/V0
0811405140 VT-MACAS-500-10/V0/I现货
0811405139 VT-MACAS-500-10/V0
0811405138 VT-VRPA2-537-10/V0/RTS
0811405137 VT-VRPA2-527-10/V0/RTS
0811405135 VT-VARAM1-527-10/V0/TIME
0811405134 VT-VARAM2-537-10/V18
0811405133 VT-VARAM1-527-10/V18
0811405132 VT-VACDS-500-10/V0/AMS
0811405131 VT-VACDS-500-10/V0/DMS
0811405129 VT-VACDS-500-10/V0/DM
0811405128 VT-VACAI-500-10/V0/VLRD
0811405126 VT-MSPA1-508-10/V0
0811405125 VT-VPRAP1-540-10/V0/T
0811405124 VT-VACAP-500-10/V0
0811405123 VT-VRRA1-527-10/V0。
而我们知道,当负载为零的时候,如果四通滑阀完全打开,p口压力=t口压力+阀口压力损失(忽略油路上的其它压力损失),如果阀口压力损失很小,t口压力又为零,那么p口的压力就不足以供给前置级阀来推动主阀芯,整个伺服阀就失效了。所以伺服阀的阀口做得偏小,即使在阀口全开的情况下,也要有一定的压力损失,来维持前置级阀的正常工作。R900955245 欢迎您的询价!ZDBEE6VP4-1X/315G24NK31V
R900955149 DBEP6A06-1X/25AG24N9K4M
R900955082 DBEP6C06-1X/45AG24K4M
R900955081 DBEP6C06-1X/25AG24K4M
R900955080 DBEP6B06-1X/45AG24K4M
R900955079 DBEP6A06-1X/45AG24K4M
R900954717 DBEME30-3X/50YG24K31M
R900954716 DBEME30-3X/350YG24K31M
R900954715 DBEME30-3X/315YG24K31M
R900954714 DBEME30-3X/200YG24K31M
R900954713 DBEME30-3X/100YG24K31M
R900954711 DBEME20-5X/50YG24K31M
R900954710 DBEME20-5X/350YG24K31M
R900954709 DBEME20-5X/200YG24K31M
R900954708 DBEME10-5X/200YG24K31M
伺服阀其实缺点极多:能耗浪费大、容易出故障、抗污染能力差、价格昂贵等等等等,好处只有一个:动态性能是所有液压阀中*高的。就凭着这一个优点,在很多对动态特性要求高的场合不得不使用伺服阀,如飞机火箭的舵机控制、汽轮机调速等等。动态要求低一点的,基本上都是比例阀的天下了欢迎您的询价!
CG5V-6BW-D-M-U-A6-11
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