引用本文: 李亮, 刘炳瑞, 张润辉. 扫路机气力系统工作效率研究1)[J]. 力学与实践, 2022, 44(1): 45-50.
LI Liang, LIU Bingrui, ZHANG Runhui. STUDY ON WORKING EFFICIENCY OF PNEUMATIC OF ROAD SWEEPER1)[J]. MECHANICS IN ENGINEERING, 2022, 44(1): 45-50.
 Citation: LI Liang, LIU Bingrui, ZHANG Runhui. STUDY ON WORKING EFFICIENCY OF PNEUMATIC OF ROAD SWEEPER1)[J]. MECHANICS IN ENGINEERING, 2022, 44(1): 45-50.

## STUDY ON WORKING EFFICIENCY OF PNEUMATIC OF ROAD SWEEPER1)

• 摘要: 本文旨在探讨提高吸式扫路机气力输送系统的效率,采用计算流体力学与离散单元法对圆柱颗粒在气体中的运动进行数值模拟,分别研究了颗粒密度、颗粒长径比、颗粒初始平面与吸入口的距离、吸入速度、颗粒所处圆周对于颗粒吸入效率的影响。研究结果表明：颗粒密度越大,颗粒的吸入效率越低;颗粒长径比对吸入效率的影响较小;颗粒初始平面与吸入口的距离与颗粒吸入效率为负相关;吸入速度增大有利于提高颗粒吸入效率,但是当吸入速度增大至一定程度时,其对吸入效率影响减小;颗粒所处圆周与吸入口圆周径向距离越小,颗粒的吸入效率越高。

Abstract: The purpose of this paper is to improve the efficiency of pneumatic conveying system of suction sweeper. The migration of cylindrical particles in gas is numerically simulated by CFD-DEM, and the effects of density and aspect ratio of particle, the distance between initial particle plane and suction inlet, suction speed and the radial distance between the circumference of the particle's initial position and the circumference of the suction inlet on particle suction efficiency are studied. The results show: The higher the particle density, the lower the particle suction efficiency; the aspect ratio of particle has little effect on the suction efficiency; the distance between the initial particle plane and the suction port is negatively correlated with the particle suction efficiency. Additionally, the increase of suction speed is beneficial to improve the particle suction efficiency, but when the suction speed increases to a certain extent, its effect on the suction efficiency decreases. Finally, the smaller the radial distance between the circumference of the particles and the circumference of the suction inlet is, the higher the suction efficiency of the particles will be.

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