DB10-1-4X/200XUW65力士乐溢流阀

DB10-1-4X/200XUW65力士乐溢流阀 德国博世力士乐REXROTH溢流阀 直动式溢流阀 先导式溢流阀

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DB10-1-4X/200XUW65力士乐溢流阀

溢流阀的特点

先导阀和主阀阀芯分别处于受力平衡，其阀口都满足压力流量方程。阀的进口压力由两次比较得到，压力值主要由先导阀调压弹簧的预压缩量确定，主阀弹簀起复位作用。

通过先导阀的流量很小，是主阀额定流量的1%因此其尺寸很小，即使是高压阀，其弹簧刚度也不大。这样一来阀的调节性能有很大改善。

主阀芯开启是利用液流流经阻力孔形成的压力差。阻力孔一般为细长孔，孔径很小0=0.8~1.2mm,孔长I = 8~12mm,因此工作时易堵塞，一旦堵塞则导致主阀口常开无法调压。

溢流阀遥控口接法

先导阀前腔有一遥控口，在该控制口接远程调压阀可实现远控，接电磁阀通回油箱可实现卸载。

远程调压阀实际上是一个单独的压力先导阀，旁接在先导型溢流阀遥控口起远程调压作用，其调定压力必须低于先导阀的调定压力。无论哪个起作用，泵的溢流量始终经主阀阀口回油箱。

溢流阀一般有两种结构：1、直动型溢流阀 。2、先导式溢流阀。

对溢流阀的主要要求：调压范围大，调压偏差小，压力振摆小，动作灵敏，过载能力大，噪声小。

先导型溢流阀的导阀部分结构尺寸较小，调压弹簧不必很强，因此压力调整比较轻便。但因先导型溢流阀要在先导阀和主阀都动作后才能起控制作用，因此反应不如直动型溢流阀灵敏。

与三节同心结构相比，二节同心结构的特点是：①主阀芯仅与阀套和主阀座有同心度要求，免去了与阀盖的配合，故结构简单，加工和装配方便。②过流面积大，在相同流量的情况下，主阀开启高度小；或者在相同开启高度的情况下，其通流能力大，因此，可做得体积小、重量轻。③主阀芯与阀套可以通用化，便于批量生产。

DB10-1-4X/200XUW65力士乐溢流阀

DB型阀是先导式泄压阀。它们用于限制工作压力。

这些阀主要由壳体（1）和带调节类型的先导控制阀（2）组成。

施加在通道P上的压力作用在主阀芯（3）上。通过喷嘴孔（4和5），压力同时施加到提升阀（6）上。如果通道P中的压力超过在弹簧（7）上设定的值，则提动阀芯（6）靠着弹簧（7）打开。现在，通过喷嘴孔（4和5），来自通道P的液压流体流入弹簧腔（8）。从此处，它通过控制线（9和10）在内部（“ –”版）或通过控制线（9和11）在外部（“ Y”版）引入储罐。

由于主阀芯（3）处于平衡状态，液压油从通道P流向通道T，从而保持设定的工作压力。

压力表接口（12）可以控制工作压力。

泄压阀可以通过油口X（13）卸荷或切换到另一个压力（第二额定压力）。

 

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R900559328 DB15G2-4X=315X/5W45

R900576748 DB15G2-4X=315X/5W45

R900577889 DB15G2-4X=315X/5W45=PL

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R900597306 DB15G2-5X/200

R900950715 DB15G2-5X/200-150

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R901239831 DB20G2-5X/100-90

R978873561 DB20G2-5X/100/12

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。