Parameters Matching of Mixing Blades for Asphalt Mixture Mixer Based on EDEM
[1]Zhao Lijun,Shen Yan,Deng Xin,et al.Parameters Matching of Mixing Blades for Asphalt Mixture Mixer Based on EDEM[J].Journal of Zhengzhou University (Engineering Science),2019,40(03):79-84.[doi:10.13705/j.issn.1671-6833.2018.06.005]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
40
Number of periods:
2019 03
Page number:
79-84
Column:
Public date:
2019-04-30
- Title:
- Parameters Matching of Mixing Blades for Asphalt Mixture Mixer Based on EDEM
- CLC:
- -
- Abstract:
- In order to improve mixing uniformity of asphalt mixture, the EDEM software based on discrete element method was used to simulate the mixing process of asphalt mixture with different mixing blade parameters. The influence on mixing uniformity and matching relationship of total number of single shaft blades, blade arrangement on single shaft, shaft angle of the blade and the number of reversing blade were determined by orthogonal analysis of the mixing time required to reach given uniformity of variation coefficient of filler content from different location in the same batch, and test verification was conducted. The results show that the variation coefficient of filler content with different mixing parameters was decreased with increase of mixing time, and the relationship between them is a negative power function. For the given uniformity of variation coefficient of filler content of 0.06, mixing time of different mixing blade parameters is about 25~35s, the maximum difference is 30%. The effect of total number of single shaft blades on mixing uniformity is the most significant, blade arrangement on the single shaft and shaft angle of the blade are the second, the number of reversing blade is the least. Under the same conditions of the capacity of mixer and blade geometrical size, the effect of improving mixing uniformity is the most remarkable by reducing the total number of single shaft blades and consequently, the length-width ratio of the mixer will be within 1. And on this basis, the other blade parameters are matched: the blades are arranged symmetrically on both sides of one shaft, the shaft angle is 45°, the number of reversing blade is 2. As far as possible to speed up the intensity and frequency of materials circular motion in mixer is the main basis for selecting and matching parameters of the mixing blade.
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Last Update:
2019-04-16