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首页> 外文会议>International Conference on Fluid Power Transmission and Control(ICFP' 2005); 20050405-08; Hangzhou(CN) >A Study on Water Hydraulic Unloading Relief Valve
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A Study on Water Hydraulic Unloading Relief Valve

机译：水压卸荷溢流阀的研究

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摘要

Although the use of water is neither new nor innovative, the use of water as a working fluid in hydraulic circuits is receiving an increasing attention by both manufactures and users due to its fire resistance and environmental compatibility. The water hydraulic components are being developed thoroughly. Materials, machining technology, structures and so on must be examined for whether or not they are compatible with water when the components are designed. The purposed of this paper is to show a water hydraulic unloading relief valve and its principle which is invented by Zhejiang university. From the view of flow control, the method of cavitation resistance of a water hydraulic unloading relief valve are investigated. The computational fluid dynamics approaches are applied to obtain static pressure distributions and cavitation images in the channel of the main stage of the valve with four kinds of structure. These structure consist of one-stage throttle, one-stage with high-pressure induct, two-stage throttle and two-stage throttle with high-pressure induct. The experiments are carried out with different supply pressure, flow rate and the opening on the pilot-operated water hydraulic relief valve. The results show that the method of combined cascading restrictors with high-pressure induct can effectively restrain cavitaion.
机译：尽管水的使用既不是新颖的也不是创新的，但是由于其耐火性和环境兼容性，在液压回路中将水用作工作流体正受到制造商和用户的越来越多的关注。水压组件正在全面开发中。在设计组件时，必须检查材料，机械加工技术，结构等是否与水兼容。本文的目的是展示浙江大学发明的一种水力式卸压溢流阀及其原理。从流量控制的角度，研究了一种水力卸荷式安全阀的抗气蚀性的方法。运用计算流体动力学方法获得了四种结构的阀门主级通道中的静压力分布和空化图像。这些结构由一级节气门，一级高压进气节气门，二级节气门和二级高压节气门组成。实验是在不同的供水压力，流量和先导式水力液压溢流阀上的开度下进行的。结果表明，采用级联限流器与高压进气管组合的方法可以有效地抑制空化现象。

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