The Objective of This Study is to Optimise the Spool 
Structure of Hydraulic Directional Valves

Yu Du; Zhijun Feng

doi:10.70711/itr.v2i2.5653

The Objective of This Study is to Optimise the Spool Structure of Hydraulic Directional Valves

Yu Du, Zhijun Feng

Abstract

The hydraulic directional valve represents a pivotal component within the hydraulic system, with its functionality exerting a considerable influence on the control system. This paper takes the manufacturers DG4V3 model directional valve as an example and proposes a
scheme to optimise the spool structure for the vortex phenomenon that exists at the concave corner of the main spool in the process of hydraulic valve directionality. The three-dimensional model of the main valve of the directional valve was established using Creo software, while the
geometric model of the flow field inside the valve was extracted using Fluent software. Visual simulation and analysis of the different opening
degrees of the internal flow field of the directional valve valve body were also conducted. The study demonstrates that when the main spool
valve is opened to a specific degree and the inlet pressure remains constant, an increase in the round angle at the concave corner of the spool
results in a notable rise in minimum pressure at the concave corner and a substantial decline in maximum turbulence energy. This effectively
hinders the formation and growth of vortices, offering a theoretical foundation for the enhancement of the hydraulic directional control valves
structural design.

Keywords

Directional; Flow field analysis; Eddies; Turbulent kinetic energy; Structural optimisation

Full Text:

PDF

Included Database

References

[1] Cao Feimei, Yao Pingxi. CFD analysis of flow field of slide valve with different spool structure [J]. Hydraulics and Pneumatics, 2017, (08):

40-3.

[2] Yang Xuping, Chen Wei, Guo Jinjin. Flow Characteristics Analysis of Hydraulic Slide Valve [J]. Mechanical Design and Manufacturing,

2013, (11): 126-8.

[3] Jihong Fu, Yang Huayong. Steady-state hydrodynamic study of a non-peripheral open-ended slide valve [J]. Journal of Mechanical Engineering, 2003, (06): 13-7.

[4] Zheng Shujuan, Quan Long, Chen Qing. CFD calculation and analysis of flow field of hydraulic cone valve during spool motion process

[J]. Journal of Agricultural Machinery, 2007, (01): 168-72.

[5] Lu Qianqian, Ruan Jian, Li Sheng. Study of radial force on spool of slide valve due to Bernoulli effect [J]. China Mechanical Engineering, 2017, 28(19): 2332-8.

[6] Zhang Jingfang, Zhang Yuhang, Yu Cong, et al. CFD simulation analysis and optimisation design of sliding valve spool concave angle

structure [J]. Hydraulics and Pneumatics, 2023, 47(05): 59-67.

[7] George, Ruiping Xiong, Yawen Zhao, Yan Diao. CFD analysis of the flow field in the throttle channel of a multidirectional directional

valve [J]. Mechanical Design and Manufacturing, 2020, (10): 239-42.

[8] Zhao Yang, Zheng Zhengbao. Optimisation of flow path structure of multi-way valve based on flow field simulation [J]. Electrical and

Mechanical Engineering, 2007, (06): 86-8.

[9] JAKOBSEN J H, HANSEN M R. CFD Assisted Steady-State Modelling of Restrictive Counterbalance Valves [J]. International Journal

of Fluid Power, 2020, 21(1): 119-46.

[10] FILO G, LISOWSKI E, RAJDA J. Flow analysis of a switching valve with innovative poppet head geometry by means of CFD method [J].

Flow Measurement and Instrumentation, 2019, 70: 101643-.

DOI: http://dx.doi.org/10.70711/itr.v2i2.5653

Refbacks

There are currently no refbacks.