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Research on Particles Flow DEM-Simulation in Transfer Station of Bulk Solids Transfer System

Author: LiangFeng
Tutor: SongWeiGang
School: Northeastern University
Course: Mechanical and Electronic Engineering
Keywords: Transfer station DEM Simulation
CLC: TH24
Type: Master's thesis
Year: 2009
Downloads: 112
Quote: 0
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Abstract


Transfer station is widely recognized as critical areas in a bulk solids handing facility especially in where large quantities of bulk solids are handled. It is not only influence operating life on itself, but also have direct effect on feed conveyor and surroundings. At the present time, research on transfer station is developing healthy. This article expounded transfer station research situation of domestic and foreign, and problems such as impact、vibration and friction attrition which occurred during the transfer process, so as to transfer station design and arrangement is unreasonable that result in material degradation dust generation and noise generation, and so on. This article introduced "Discrete Element Method(shorted DEM)" used in transfer station’s research process, and established discrete element unit models for transfer process research. Based on an example of transfer station used in a port project, this article established an EDEM simulation model, and realized visualization research in transfer process.Based on material movement trajectory, together with some achievement come from many researchers, analysis and comparison exist theory and methods on research transfer station. Using basic principle of DEM and Hertz contact theory, this article introduced the judgment methods of material particles contact with each other and particles contact with boundary, and established contact mechanic models. Taking a project’s transfer station as the example, build up this transfer station and particle CAD models by Pro/E. Through EDEM simulate this transfer station operating process, analyze particles’movement trajectory during transfer process simulation, and analyze stress on each component of transfer station. Then we can find out dangerous parts that maybe caused transfer station working inactivation, such as discharge funnel and separate material trough. Though above analysis, we can put forward some optimization design methods to improve related components of this transfer station. So this article improved discharge funnel’s geometrical shape as well as transition segment of separate material trough and leading material trough. What’s more, the article also improved transfer chute’s spatial arrangement and added some cushion or reduced the vibration facilities. Compared stress come from improved transfer station with what that come from before improve, it is obviously that the optimization design methods is correct to a great extent.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Lifting machinery and transport machinery > Loading and unloading machinery
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