密炼机转子系统流场特性研究

doi:10.19491/j.issn.1001-9278.2020.04.011

中国塑料 ›› 2020, Vol. 34 ›› Issue (4): 60-69.DOI: 10.19491/j.issn.1001-9278.2020.04.011

密炼机转子系统流场特性研究

韩博宏, 何延东(), 朱向哲

辽宁石油化工大学机械工程学院，辽宁抚顺 113001

收稿日期:2019-10-09 出版日期:2020-04-26 发布日期:2020-04-26
基金资助:
国家自然科学基金项目(51473073);辽宁省自然科学基金项目(2019?ZD?0061)

Study on Flow⁃Field Characteristics of Rotor System in Internal Mixer

Bohong HAN, Yandong HE(), Xiangzhe ZHU

School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, China

Received:2019-10-09 Online:2020-04-26 Published:2020-04-26
Contact: Yandong HE E-mail:57424824@qq.com

摘要/Abstract

摘要：

采用瞬态计算方法，对4WS型密炼机转子流场进行模拟分析。结果表明，流场的最大速度位于转子棱顶部位，这一位置容易发生回流，转子间隙的流体速度随着转子运行时间逐渐增大直至稳定；转子转动方向的改变会对流体中心区域造成很大影响，对近壁区影响较小；随着转子转动，推进区和背压区的压力差逐渐减小，回流现象随之减少。

关键词: 密炼机, 流场, 速度云图, 压力云图

Abstract:

A transient calculation method is used to simulate the rotor of a 4WS?tpye internal mixer. The maximum velocity of flow field was found to distribute on the top of the rotor ridge, where the reflux was prone to take place. The fluid velocity in the rotor clearance increased gradually and then tended to be stable with the running time of rotor until. There is a great influence on the fluid center area but a small impact on the near?wall area from the change of the rotating direction of the rotor. With the rotation of the rotor, the pressure difference between the propulsion area and backpressure zone decreased gradually, and the reflux phenomenon decreased accordingly.

Key words: internal mixer, flow field, velocity nephogram, pressure nephogram

中图分类号:

TQ 320.5

韩博宏, 何延东, 朱向哲. 密炼机转子系统流场特性研究[J]. 中国塑料, 2020, 34(4): 60-69.

Bohong HAN, Yandong HE, Xiangzhe ZHU. Study on Flow⁃Field Characteristics of Rotor System in Internal Mixer[J]. China Plastics, 2020, 34(4): 60-69.

图/表 15

参数	数值
密度（ρ）/kg·m^-3	7 800
弹性模量（E）/GPa	210
剪切模量（T）/GPa	80.8
泊松比（μ₀）	0.3
拉伸强度（σ）/MPa	980
屈服强度（σ₁）/MPa	835
最大许用应力（[σ_b]）/MPa	557

表1 转子材料参数

Tab.1 Rotor material parameters

图1 转子几何模型

Fig.1 Rotor geometric model

几何参数	数值
棱顶宽度/mm	2
棱顶间隙/mm	1
转子根直径/mm	25
转子最大回转直径/mm	42
长棱螺旋角/°	30
短棱螺旋角/°	45
长棱长度/mm	50
短棱长度/mm	30
棱长/mm	76
转子中心距/mm	45

表2 模型所用参数

Tab.2 Parameters of the model

图2 流场示意图

Fig.2 Flow field diagram

图3 网格模型

Fig.3 Grid model

图4 转子截面示意图

Fig.4 Schematic diagram of the rotor section

图5 不同时刻不同截面的速度云图 (同向转子)

Fig.5 Velocity nephogram of different sections at different moments (the same direction rotor)

图6 不同时刻不同截面的速度云图 (异向转子)

Fig.6 Velocity nephogram of different sections at different moments (the opposite direction rotor)

图7 0.52 s时Z2截面的矢量图 (同向转子)

Fig.7 Vector diagram of Z2 section at 0.52 s (the same direction rotor)

图8 0.52 s时Z2截面的矢量图 (异向转子)

Fig.8 Vector diagram of Z2 section at 0.52 s (the opposite direction rotor)

图9 流场数据取值位置

Fig.9 Value position of flow field data

图10 不同区域的速度曲线

Fig.10 Velocity curves of different regions

图11 不同时刻不同截面的压力云图 (同向转子)

Fig.11 Pressure nephogram of different sections at different moments (the same direction rotor)

图12 不同时刻不同截面的压力云图 (异向转子)

Fig.12 Pressure nephogram of different sections at different moments (the opposite direction rotor)

图13 同区域的压力曲线

Fig.13 Pressure curves of different regions

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密炼机转子系统流场特性研究

Study on Flow⁃Field Characteristics of Rotor System in Internal Mixer

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