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Basic Problems in Fast Hydraulic Switching Valve Technology

机译：快速液压切换阀技术的基本问题

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Fast and high flow rate switching valves are an upcoming research topic in hydraulics. Requirements for such valves stem from novel fast actuation systems, from emergency handling devices, or from switching control hydraulic systems. New design concepts for such valves are necessary to achieve high flow rates with light weight spools and with short strokes. A basic feature of such valve concepts is to provide multiple metering edges. Inertia not only of the spool but also of the armature of the solenoid for the valve's actuation and of eventual intermediate gears are relevant and have to be minimized to reduce the effort of the actuator. Solenoids with a flat armature seem to be the best fitting magnetic actuator type for fast switching. Their force characteristics provides high forces only for small armature strokes. This has to be compensated by a properly tuned gear and repelling spring. Spools with tiny land shapes may cause spool sticking problems which can be prohibited by a proper spool and sleeve design. Fast switching has to be accompanied by measures to avoid harmful pressure oscillations, cavitation, and too high flow rate peaks. Such measures interact with the valve design.
机译：快速和高流量切换阀是液压系统即将到来的研究主题。这些阀门的要求源于新型的快速致动系统，从紧急处理设备或切换控制液压系统。这种阀门的新设计概念是通过轻量级线轴和短程进行高流速来实现高流速。这种阀门概念的基本特征是提供多个计量边缘。惰性不仅是线轴，而且对于阀门的致动和最终中间齿轮的电磁阀的电枢是相关的，并且必须最小化以减少执行器的努力。具有扁平电枢的电磁阀似乎是快速切换的最佳磁力执行器类型。他们的力量特征仅为小型电枢行程提供高力。这必须通过适当调谐的齿轮和排斥弹簧来补偿。带有微小陆地形状的线轴可能导致卷隙粘贴问题，可以通过适当的阀芯和套筒设计禁止。快速切换必须伴随措施，以避免有害压力振荡，空化和过高的流速峰值。这些措施与阀门设计相互作用。

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