摊铺机螺旋分料器建模仿真与粒料运动分析

论文总字数：30608字

摘 要

本文对摊铺机螺旋分料器进行建模与设计，主要工作包括：

通过研究螺旋分料器作用下混合料的运动规律，分析螺旋分料器的主要结构和工作参数对分料质量的影响，包括螺旋转速、叶片直径、螺距及螺旋升角等。同时，应用HyperMesh软件对摊铺机螺旋分料器三维模型划分网格，导入Fluent软件对分料器内沥青运动情况模拟仿真，重点分析了螺旋转速对分料器沿螺旋轴向下料量的影响，并探讨沥青运动与摊铺机行走速度的关系。最后，采用变径变螺距螺旋分料器数学模型对螺旋分料机构进行参数优化，从理论上验证了变径变螺距技术的可行性，为改善混合料均匀性、提高摊铺平整度以及为螺旋分料器的设计生产和摊铺施工技术提供可靠依据。

关键词：螺旋分料器；沥青运动；建模仿真；变径变螺距；参数优化

Modeling and simulation of Paver spiral distributor

For analysis of particle motion

02011119 Geng Yazhou

Supervised by Sun Beibei

Abstract：Paver is the main equipment for asphalt concrete pavement construction ,which is responsible for the phenomenon of the crack,loose ,pit and water damage of asphalt pavement. As the important part of paver ,spiral distributor’s function is to make sure the asphalt mixture is evenly distributed to the front of the ironing plate when it is stirred well enough to meet the technical requirements. To improve the dividing effect and spreading quality , lots of researches have been done,which involves the influence of spiral distributor’s structure and working parameters and the movement of asphalt.

The model of paver spiral distributor has been redesigned. The main work includes:

By studying the motion law of pellets under the effect of spiral distributor, this paper analyses the homogeneity of mixture due to the main structure and working parameters including the screw speed, diameter of leaves and the pitch of the helix angle bisection. At the same time, the paver spiral distributor 3D modeling is completed and meshed by HyperMesh. Then the modeling is imported to Fluent CFD software for simulation of movement of asphalt in the distributor . This paper mainly analyses the relationship between spiral feeder speed and quality of asphalt mixture, and discusses correlation of the asphalt movement and stalls paver walking speed. Finally, the variable diameter and variable pitch mathematical model of spiral into feeding mechanism were used to optimize the parameters and theoretically validated variable diameter and variable pitch technology feasibility, in order to improve the paving mixture spread uniformity and paving smoothness. This paper also provides a reliable basis on spiral distributor design production and spreading paving construction technology.

Key words: spiral distributor ; asphalt movement ; modeling and simulation ; Variable diameters

and pitches ; parameter optimization

目 录

摘要 I

Abstract II

1、绪论 1

1.1 研究背景与意义 1

1.2 国内外研究现状 1

1.3 研究内容 2

2、螺旋分料器的结构及工作原理 3

2.1 螺旋分料器的结构 3

2.2 工作介质 4

2.3 螺旋分料器的输送机理 4

2.3.1 沥青混合料的动力学分析 4

2.3.2 沥青混合料运动分析 5

2.4 本章小结 7

3、结构和工作参数对分料质量的影响 8

3.1 螺旋分料器主要设计参数分析 8

3.1.1 螺旋分料器转速 8

3.1.2 螺旋升角 9

3.1.3 螺距 10

3.1.4 螺旋叶片 10

3.2 等径等螺距的螺旋分料器沥青混合料运动分析 11

3.3 本章小结 11

4、基于Fluent的沥青运动仿真 12

4.1 螺旋分料器建模 12

4.2 HyperMesh网格划分 14

4.3 Fluent仿真 14

4.4 沥青运动与摊铺行走速度的关系 18

4.4.1 螺旋转速对沥青运动的影响 18

4.4.2 摊铺机行走速度的确定 18

4.4.3 螺旋转速的确定 19

4.4.4 螺旋转速和摊铺机行走速度匹配 20

4.5 本章小结 21

5、螺旋分料机构参数优化 22

5.1 参数优化原理 22

5.2变径变螺距螺旋分料器的设计 22

5.2.1 变径变螺距参数化模型 22

5.2.2 参数方程与螺距 23

5.2.3 螺旋叶片的最小半径 24

5.3 变径变螺距计算及参数优化 24

5.4 本章小结 28

6、总结与展望 29

6.1 全文总结 29

6.2 不足与改进 29

致 谢 30

参考文献 31

摊铺机螺旋分料器建模仿真与料粒运动分析

1、绪论

1.1 研究背景与意义

进入2l世纪，我国的公路事业得到了突飞猛进的发展，公路建设是实现全面建设小康社会目标的保证。我国90%的高速公路采用沥青混凝土路面。较之水泥混凝土路面，沥青混凝土路面行车更为舒适，施工技术更加成熟，具有平整、耐磨、无接缝、振动小、可分期修建、施工期短、养护维修简单等优点。因此，高等级公路多以沥青混凝土路面为主，并广泛应用于城际间、城乡间和农村公路上。

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