DBEM20-7X/200XYG24K4M力士乐比例阀

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DBEM20-7X/200XYG24K4M

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DBEM20-7X/200XYG24K4M

直动式溢流阀主要由阀体、阀芯、调压弹簧和调压螺钉(或称手柄)组成。阀芯为锥阀的直动式溢流阀的结构和工作原理及图形符号。在常态下,阀芯在调压弹簧的作用下紧贴在阀座上,进油口P和出油口T 是不通的(即溢流阀为常闭型)。 [1]
当将溢流阀接人系统时,液压油就在阀芯上产生一个作用力,力的方向与弹簧力的方向相反,当进油口压力低于溢流阀的调定压力时,则阀芯不开启,此时进油口压力主要取决于外负载。当油液作用力大于弹簧力时,阀芯开启,油液从溢流口流回油箱。弹簧力随着溢流阀的开口量的增大而增大,直至与液压作用力相平衡。当溢流阀开始溢流时,其进油口处的压力基本稳定在调定值上，从而起到溢流稳压的作用。通过调压螺钉调节弹簧的预压缩量，可以调定溢流阀溢流压力值的大小。
溢流阀
溢流阀是一种液压压力控制阀，在液压设备中主要起定压溢流，稳压，系统卸荷和安全保护作用。溢流阀在装配或使用中，由于O形密封圈、组合密封圈的损坏，或者安装螺钉、管接头的松动，都可能造成不应有的外泄漏。力士乐 比例阀 武汉 现货
如果锥阀或主阀芯磨损过大，或者密封面接触不良，还将造成内泄漏过大，甚至影响正常工作。
中文名 溢流阀 外文名 regulating valve 功 能 保持系统压力稳定 释 义 一种液压压力控制阀 作 用 定压溢流，稳压等
DBEM20-7X/200XYG24K4M