DBW20B2-5X/315-6EG24N9K4 SO160电磁溢流阀 德国博世力士乐REXROTH溢流阀 电磁溢流阀

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DBW20B2-5X/315-6EG24N9K4 SO160电磁溢流阀

溢流阀

类型:直动式、先导式

作用:

(1)在不断溢流过程中保持系统压力恒定，起稳压和溢流作用(p,FP

系统’阀口常开) ;

(2)防止液压系统过载，起安全保护作用(p,=1.1~1.2p,max，阀口常闭)

(一)溢流阀的基本结构及其工作原理

1、直动式溢流阀

工作原理:

直接利用液压力与弹簧力相平衡以控制阀芯的启闭动作，从而保证进油口压力基本恒定。

特点:

①阀芯所受的液压力全靠弹簧力平衡，故当系统压力很高时，弹簧必须很硬，导致结构笨重，调压不轻便。一般用于压力小于2.5MPa的低压系统中，作安全阀或背压阀使用。

②由于惯性或负载的变化，导致q、变化，即开口度h的变化，由于k很大，所以p不稳定，稳压精度差;

③结构简单、便宜，但工作时易产生振动和噪音。

溢流阀是压力控制阀。其作用主要是控制系统压力，以保护油泵和油路系统的安全及保持油路系统的压力恒定。通经为8毫米的溢流阀是一个小型的直接动作的溢流阀，可以和主溢流阀的遥控口连接，对主溢流阀实现远程压力调节。溢流阀的遥控口经换向阀和油箱连接时，可使油路卸荷。此时溢流阀起卸荷作用。溢流阀的遥控口串联换向阀和通经为8毫米的溢流阀时，可实现压力的多级控制。

DBW20B2-5X/315-6EG24N9K4 SO160电磁溢流阀

DBW 型压力阀是一种先导式溢流阀。

它们用于限制和电磁驱动卸载工作压力。

该阀主要由带主阀芯插件 (3) 的主阀 (1) 和带压力调节元件的先导控制阀 (2) 和一个集成方向滑阀 (16) 组成。

该阀的功能与DB型阀基本相同。然而，主阀芯 (3) 的卸载是通过控制安装的方向滑阀 (16) 来实现的。

带切换减震的溢流阀（夹层板），版本“DBW.../..S6...R12”

从 B2 到 B1 的连接的打开通过切换减震阀 (17) 延迟。因此避免了回流管路中的压力峰值和声学减压冲击。它安装在先导控制阀 (2) 和方向阀 (16) 之间。

阻尼（减压冲击）的程度由喷嘴（18）的尺寸决定。建议使用 ?1.2 mm 的喷嘴（订购代码“R12”）。

电磁阀线圈的额定电压有DC12V、DC24V、AC24V（50/60Hz）、AC110V（50/60Hz）、AC220V（50/60Hz）、AC380V（50/60Hz）。一般在电气设计时要么采用AC220V（不需加装开关电源，成本低、线路简单而便于维护）、要么采用DC24V（常用的的安全电压、开关电源/电磁阀线圈都易于维修更换）。

检测电磁阀好坏的方法：先给电磁阀通上被控制的介质（带压力的液体、气体<空气>，压力值为电磁阀使用压力范围的中间值），再给电磁阀线圈通电，如果被控制介质有从通到断或从断到通的状态的变化，那么电磁阀就是好的，否则就是有问题的。

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R901005699 DBW20B2-5X/200S6SMG24N9K4B12D

安全阀是启闭件受外力作用下处于常闭状态，当设备或管道内的介质压力升高超过规定值时，通过向系统外排放介质来防止管道或设备内介质压力超过规定数值的特殊阀门。安全阀属于自动阀类，主要用于锅炉、压力容器和管道上，控制压力不超过规定值，对人身安全和设备运行起重要保护作用。注安全阀必须经过压力试验才能使用。