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<p>Water is a clean and pollution-free medium, making it an excellent alternative to hydraulic oil as a transmission medium. However, the widespread application of water hydraulic systems is currently hindered by poor sealing performance and the complex structure of control components. To address these challenges, this study introduces an innovative 4/3 water hydraulic directional valve. The proposed valve adopts a contact-type dynamic sealing structure, which offers superior sealing performance and the ability to withstand a wider range of high pressures. Additionally, it features a simple structure and low manufacturing cost. A prototype was developed and subjected to rigorous performance testing. The experimental results demonstrate that the valve realizes reliable directional control functions, exhibits excellent dynamic characteristics, and ensures safe and reliable control of hydraulic cylinders. Under different pressure conditions, the valve maintains ideal sealing performance both in the neutral and working positions after directional switching. The development of the novel 4/3 water hydraulic directional valve not only enriches the range and application scope of water hydraulic components but also shows significant potential for advancing hydraulic transmission technology from oil-based to water-based systems.</p>

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Experimental study on a three-position four-way water hydraulic directional valve with a novel sealing structure

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月1日

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  • Xi Zhang,
  • Xijie Fan,
  • Jiawei Liang,
  • Kailu Chen,
  • Daoying Gao,
  • Zeqian Wang,
  • Hongyu Xu,
  • Miaomiao Gao

摘要

Water is a clean and pollution-free medium, making it an excellent alternative to hydraulic oil as a transmission medium. However, the widespread application of water hydraulic systems is currently hindered by poor sealing performance and the complex structure of control components. To address these challenges, this study introduces an innovative 4/3 water hydraulic directional valve. The proposed valve adopts a contact-type dynamic sealing structure, which offers superior sealing performance and the ability to withstand a wider range of high pressures. Additionally, it features a simple structure and low manufacturing cost. A prototype was developed and subjected to rigorous performance testing. The experimental results demonstrate that the valve realizes reliable directional control functions, exhibits excellent dynamic characteristics, and ensures safe and reliable control of hydraulic cylinders. Under different pressure conditions, the valve maintains ideal sealing performance both in the neutral and working positions after directional switching. The development of the novel 4/3 water hydraulic directional valve not only enriches the range and application scope of water hydraulic components but also shows significant potential for advancing hydraulic transmission technology from oil-based to water-based systems.