品牌:Rexroth/力士乐 | 类型:叠加阀 | 材质:铸铁 |
连接形式:对夹 | 驱动方式:电磁 | 产品特性:液压控制 |
类型(通道位置):二通式 |
4WRPEH10C3B100L-3X/M/24A1德国产力士乐伺服阀供应中
4WRPEH10C3B100L-20/G24K0/A1M德国产力士乐伺服阀供应中
比例阀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。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。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。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、昂贵等等等等,好处只有一个:动态性能是所有液压阀中的。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。一般说来,好像伺服系统都是闭环控制,比例多用于开环控制;其次比例阀类型要多,有比例压力、流量控制阀等,控制比伺服要灵活一些。从他们内部结构看,伺服阀多是零遮盖,比例阀则有一定的死区,控制精度要低,响应要慢。但从发展趋势看,特别在比例方向流量控制阀和伺服阀方面,两者性能差别逐渐在缩小,另外比例阀的成本比伺服阀要低许多,抗污染能力也强!
2X2X Software Ltd(简称2X)是一家面向快速发展的基于服务器计算架构市场的软件开发商,全球致力于为企业提供应用软件访问解决方案的供应商。2X在美国、德国、英国、法国、澳大利亚、日本、塞浦路斯、马耳他分别设有办事处。
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经营产品:
阀类:电磁阀、换向阀、单向阀、溢流阀、减压阀、平衡
阀、插装阀、比例阀等
泵类:齿轮泵、柱塞泵、叶片泵等
武穴黎翔机电设备有限公司REXROTH力士乐售部
询价联系人:陈工
询价热线:0713-8529058,18995766168
询价QQ:1477538929,2593165857
欢迎您的来电!DG4V-5-8CJ-VM-U-H6-20 威格士电磁阀
传真:0713-6542758
应用于钢铁、冶金、铝行业、石油化工、航天、船舶制造、煤炭、水泥、电力、汽车、工程机械、食品、药业、林业、纺织、皮革、造纸等行业领域
型号优势:
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