Influence Law of Separation Efficiency of Solid-liquid Cyclone Separator for Hydraulic Tank

doi:10.3901/JME.2021.24.102

Abstract

Abstract: Particulate matter pollution is one of the main reasons that affect the performance of hydraulic components and systems of mobile equipment. Considering the removal of impurities in the hydraulic tank, it will increase its design volume, which is not conducive to the lightweight design of the hydraulic system. Using the principle of centrifugal separation, the media of different densities are classified and screened in the high-speed rotating flow field, which can quickly remove large particles of pollutants in the hydraulic oil, improve the reliability of the hydraulic system and increase the service life of the filter. Due to the complex flow form of the flow field in the cyclone, it is very difficult to predict the characteristics of the flow field and the particle movement trajectory inside the cyclone. Therefore, the study of the flow law of the cyclone flow field and the swirling separation mechanism of pollutants could provide a theoretical basis to the hydraulic system pollutants separation and removal. This article focused on the flow field distribution law of the solid-liquid cyclone separator and the influence law of pollutant separation efficiency. According to the cyclone separation theory, the structure of the solid-liquid cyclone separator was designed, and the distribution law of the axial velocity and tangential velocity of the solid-liquid cyclone separator was analyzed under different cylinder diameters and cylinder lengths. The simulation results were carried out by the particle image velocimetry method. The experiment was verified, and the influence law of the structure parameter on the separation efficiency was obtained. The results show that when the axial velocity at the center is negative and the axial velocity near the wall is positive, the separation effect increases with the increase of tangential speed. The research results can provide theoretical guidance for the structural design of solid-liquid cyclone separators for hydraulic tanks.

Key words: cyclone, velocity distribution, pollution particle, finite element analysis

CLC Number:

TH137

ZHANG Jin, YIN Wenlong, CHENG Yujie, YANG Qifan, LI Ying, ZHU Yi. Influence Law of Separation Efficiency of Solid-liquid Cyclone Separator for Hydraulic Tank[J]. Journal of Mechanical Engineering, 2021, 57(24): 102-113.

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