| 汤东征， 张浩， 陈晔.泵送环在机械密封介质侧防污堵结构中的应用[J].轻工机械,2019,37(5):45-50 |
| 泵送环在机械密封介质侧防污堵结构中的应用 |
| Application of Pumping Ring in Anti Fouling Structure of Mechanical Seal Medium Side |
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| DOI：10.3969/j.issn.1005 2895.2019.05.009 |
| 中文关键词: 机械密封 泵送环 防污堵 有限元法 |
| 英文关键词:mechanical seal pumping ring anti fouling FEM（finite element method） |
| 基金项目: |
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| 摘要点击次数: 847 |
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| 中文摘要: |
| 针对易聚合介质循环泵机械密封工作时存在的密封组件被聚合物堵塞、密封端面过度磨损等问题，课题组提出增加泵送环作为流体辅助推送装置，用以改善介质流动状况，避免聚合物颗粒的累积。课题组采用有限元计算方法对介质侧密封腔内固液两相流场进行数值模拟，研究泵送环旋向与螺旋角对密封腔内聚合物颗粒速度与体积分数分布的影响。结果表明：泵送环为左旋时，介质侧流动的轴向速度更高且密封动静环端面处颗粒的体积分数更低；当螺旋角为45°时，动静环端面处固相颗粒的体积分数最低。泵送环的应用降低了密封端面外表面上的颗粒体积分数并提高了颗粒的流动速度，为机械密封防污堵结构的设计提供参考。 |
| 英文摘要: |
| In view of the problem that the sealing assembly of the mechanical seal of the easily polymerized circulating pump is blocked by the polymer and the sealing end face is excessively worn, the method of adding the pumping ring as a fluid assisted pushing device was proposed to improve the flow of the medium and avoid the accumulation of polymer particles. The finite element method was used to simulate the solid liquid two phase flow field in the medium side sealed cavity. The effects of the screw direction and the helix angle of the pumping ring on the velocity and volume fraction distribution of the polymer particles in the sealed cavity were studied. The results show that when the pumping ring is left handed, the axial velocity of the medium side is higher and the particle volume fraction at the end of the sealing dynamic ring is lower. When the helix angle is 45°, the volume fraction of the solid particles at the end of the dynamic and static ring is the lowest. The application of the pumping ring reduces the particle volume fraction on the outer surface of the sealing end face and increases the flow velocity of the particles, which provides a reference for the design of the mechanical seal anti fouling structure. |
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