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Zhejiang Machinery and Electrical Group

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Air cushion flow field characteristics of air cushion belt conveyor
Published:2022-09-22 author:TIAN Li-qiang, KOU Zi-ming, WU Juan, et al. Browse: 602 Check PDF documents

Air cushion flow field characteristics of air cushion belt conveyor

TIAN Li-qiang1,2, KOU Zi-ming1,2, WU Juan1,2, WANG Fa-yu 3

(1.College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan 030024, China; 
2.National and Local Joint Engineering Laboratory for Mine Fluid Control, Taiyuan 030024, China; 
3.Taiyuan Rail Transit Development Co.,Ltd., Taiyuan 030024, China)

Abstract: Aiming at the non-uniformity of the air film between the conveyor belt and the trough during the operation of the air-cushion belt conveyor, a comprehensive study was executed by means of simulation analysis. Firstly, the air cushion pressure was theoretically deduced according to the principle of force balance, and the theoretical distribution expression and curve of air cushion pressure were given. Then, by constructing a gas flow model around the stomata, the pressure and velocity distribution of the flow field near the stomata were deduced, by constructing a cross-sectional gas outflow model, the outflow velocity and pressure distribution of the air cushion along the cross-section were deduced. Finally, the air cushion field was simulated and analyzed based on the fluid dynamics analysis software Fluent, the effects of different pore velocity, pore arrangement and air cushion thickness on the characteristics of the air cushion flow field were studied. The results indicate that air cushion pressure decreases with increasing air cushion thickness. The bearing capacity of the air cushion has a linear relationship with the stomatal flow rate, and the linear ratio is K=41.57. The optimal design parameters for the arrangement of air holes is the aperture of 7 mm and the hole spacing of 75 mm.When the air cushion thickness is 3 mm ~5 mm,air cushion stiffness decreases with increasing air cushion thickness.

Key words:  air cushion belt conveyor; nonuniformity of air film;air cushion pressure; numerical simulation; stomatal flow rate; air cushion stiffness;Fluent
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