Numerical Analysis and Optimisation of the Flow Forces in a Water Hydraulic Proportional Cartridge Valve for Injection System

Han, Mingxing; Liu, Yinshui; Wu, Defa; Tan, Huaijiang; Li, Chao

doi:10.1109/access.2018.2805684

Cited by 26 publications

(22 citation statements)

References 26 publications

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“…A preliminary investigation shows that there is a negligible difference among the standard, RNG and Realizable k-ε models in predicting the mass flow rate. This is consistent with previous studies on the cavitating water hydraulic valves [7], [8], [25]. Thus, in this work, the Singhal et al model is used for solving vapor fraction and the standard k-ε model is chosen for calculating turbulent characteristics, as used in [12], [13], and [26]- [28].…”

Section: Governing Equationssupporting

confidence: 73%

Numerical Simulations on Flow Characteristics of a Nozzle-Flapper Servo Valve With Diamond Nozzles

Yang

Wen

2019

IEEE Access

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Nozzle-flapper servo valves are widely used in modern electro-hydraulic control systems of many engineering applications. Flow cavitation in the nozzle-flapper pilot stage could produce noise and cavitation erosion, reducing the performance stability and reliability of the servo valves. In this paper, diamond nozzles are proposed to replace the traditional circular nozzles to reduce the flow cavitation in the nozzle-flapper stage. Numerical simulations using CFD software ANSYS/FLUENT were conducted to explore the flow characteristics of the nozzle-flapper pilot stage. Mass flow rate and image measurements were performed to verify the simulation results. Vapor fraction, lateral velocity, pressure distribution, and flow force are compared in detail between the pilot stage with the traditional nozzles and with the diamond nozzles. It is found that the vapor fraction is greatly reduced under the effect of the diamond nozzles. Finally, to explore the effect of the diamond nozzles on the performance of the nozzle-flapper servo valve, the pressure-flow characteristics and time step response of the load flow rate are examined using the software AMESim. The simulation results show that the pressure-flow characteristics and time step response of the load flow rate almost remain the same. This suggests that the diamond nozzles could suppress the cavitation in the nozzle-flapper servo valve without varying its performance.

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Section: Governing Equationssupporting

confidence: 73%

Numerical Simulations on Flow Characteristics of a Nozzle-Flapper Servo Valve With Diamond Nozzles

Yang

Wen

2019

IEEE Access

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“…Having a reasonable accuracy for a wide range of turbulent flows and a tolerable difference in results (about 2%) compared to other turbulent models [8], [15], [28], [29]. Moreover, this is also consistent with previous studies on the cavitating water hydraulic valves [20], [7], [8], [30]. Thus, it can be understood that the effect of turbulent model on both qualitative and quantitative results is not significant and therefore, for turbulent characteristics, the set of turbulent kinetic energy and dissipation rate equations are employed by using realizable k − ε model.…”

Section: B Governing Equations and Solving Methodssupporting

confidence: 90%

Numerical and Experimental Investigations of Cavitation Phenomena Inside the Pilot Stage of the Deflector Jet Servo-Valve

Saha

Peng

2020

IEEE Access

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Two-stage electrohydraulic servo-valves play an important role in the most modern hydraulic servo control systems for fight wing controls, manufacturing robots, and many engineering applications. The existence of cavitation inside the pilot stage is one of the root causes of self-excited noise, cavitation erosion, system jam, and frequent failures of electrohydraulic servo-valves. Thus, experimental and numerical investigations of the flow field and cavitation phenomena inside the pilot stage of deflector jet servo-valve under different supply pressures conditions are conducted in this paper. An assembly for experimental verification of the flow visualization process that represents the deflector jet pilot stage is produced and discussed. To test and verify the numerical simulations for cavitation phenomena, the flow field characteristics in the deflector jet pilot stage are investigated by using experimental flow visualization. The cavitation inception inside the pilot stage of the deflector jet servo-valve is experimentally confirmed through flow visualization. More importantly, the attached cloud-like cavitation or bubble shedding is observed along with the jet flow and the significant locations of cavitation inception are also identified for varying supply pressures. The profile of turbulent intensity confirms to conclude that turbulent pressure fluctuations contribute to cavitation. The result also shows that the increment of supply pressure intensifies cavitation and output pressure plays a significant role in reducing the intensity of cavitation inside the pilot stage of deflector jet servo-valve. Finally, the numerical results show good agreement with experimental results. INDEX TERMS Servo-valve, deflector jet servo-valve, turbulent flow, cavitation, numerical simulations.

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“…Table 7. Applying the calculation of the positive and negative outranking flows, using Equations (6) and (7). Water hydraulics valves are subjected to cavitation erosion, wear, and corrosion due to a high bubbles implosion impact; selected properties of PTFE fit well with the coating requirements.…”

Section: Resultsmentioning

confidence: 99%

“…Hydraulic systems that utilize water as a pressure medium could be the correct solution for the environmental and safety problems of most oil hydraulic systems [6]. Water hydraulic systems have been widely used in the fields of steel and glass production, ocean exploration, food and medicine processing, and coal mining [3,7]. Water-based systems are highly and time-consuming task because of the presence of a large number of materials with different attributes.…”

Section: Introductionmentioning

confidence: 99%

Material Analysis and Molecular Dynamics Simulation for Cavitation Erosion and Corrosion Suppression in Water Hydraulic Valves

Mlela

Sun

et al. 2020

Materials

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In the milestone of straggling to make water hydraulics more advantageous, the choice of coating polymer for water hydraulics valves plays an essential role in alleviating the impact of cavitation erosion and corrosion, and this is a critical task for designers. Fulfilling the appropriate selection, we conflicted properties that are vital for erosion and corrosion inhibitors, as well as the tribology in the sense of coefficient of friction. This article aimed to choose the best alternative polymer for coating on the selected substrate, that is, Cr2O3, Al2O3, Ti2O3. By applying PROMETHEE (Preference Ranking Organization Method for Enrichment Evaluations), the best polymer obtained with an analyzed performance attribute is Polytetrafluoroethylene (PTFE) that comes up with higher outranking (0.5932052). A Molecular Dynamics (MD) simulation was conducted to identify the stronger bonding with the regards of the better cleave plane between Polytetrafluoroethylene (PTFE) and the selected substrate. Polytetrafluoroethylene (PTFE)/Al2O3 cleaved in (010) plane was observed to be the strongest bond in terms of binding energy (3188 kJ/mol) suitable for further studies.

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Numerical Analysis and Optimisation of the Flow Forces in a Water Hydraulic Proportional Cartridge Valve for Injection System

Cited by 26 publications

References 26 publications

Numerical Simulations on Flow Characteristics of a Nozzle-Flapper Servo Valve With Diamond Nozzles

Numerical Simulations on Flow Characteristics of a Nozzle-Flapper Servo Valve With Diamond Nozzles

Numerical and Experimental Investigations of Cavitation Phenomena Inside the Pilot Stage of the Deflector Jet Servo-Valve

Material Analysis and Molecular Dynamics Simulation for Cavitation Erosion and Corrosion Suppression in Water Hydraulic Valves

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