射流管式伺服阀冲蚀磨损特性

doi:10.7527/S1000-6893.2014.0137

Abstract

Abstract:

The jet pipe servo valve is a kind of typical two-stage flow control electro-hydraulic servo valve; the flow field of the nozzle to the receiver parts is the most complex part, which can produce erosion wear because of the pollution of hydraulic medium. Taking the jet pipe servo valve as the research object, combining the theory of computational fluid dynamics(CFD) with the erosion wear theory, applying Reynolds averaged Navier-Stokes equations, the standard k-ε two-equation model (liquid phase), discrete phase model (DPM)(solid phase) and the erosion wear model of plastic material, through the fluid dynamics software FLUENT, we establish a visual simulation model of the nozzle to the receiver parts of the jet pipe servo valve, conducte the erosion wear rate of the numerical simulation and calculate the theoretical life in this paper. The research results demonstrate that the erosion wear of the solid particle in the hydraulic medium to the jet pipe servo valve is mainly focused on the middle inwall area between the left and right receiving holes, the maximum wear rate decreases with the increase of the offset of the nozzle and the trend of left and right sides is symmetrical. The methods and results have provided an important reference for failure's qualitative analysis and forecast and theoretical life's quantitative calculation of the jet pipe servo valve.

Key words: computational fluid dynamics, jet pipe servo valve, erosion wear, liquid-solid two phase flow, life prediction

CLC Number:

V214.1

CHU Yuanbo, YUAN Zhaohui, ZHANG Ying. Erosion wear characteristic of jet pipe servo valve[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(5): 1548-1555.

References

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Erosion wear characteristic of jet pipe servo valve

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