结构形式对渣浆泵前腔密封面磨损特性的影响

Influence of structure on wear characteristics performance for sealing surface of front chamber of slurry pump

为了研究渣浆泵前腔密封结构对其密封面磨损特性的影响,以ESH型旋流器给料泵为研究对象,选择4种常用的前腔密封结构,在工况以及叶轮和蜗壳的水力参数均相同的前提下,应用计算流体动力学软件ANSYS CFX和磨损模型对泵内固液两相流进行数值模拟,并通过试验进行验证.研究结果表明:采用角式小间隙密封结构,密封面上固相浓度最低,固相的速度分布最均匀,密封面的失重量最小,抗磨损效果最好,其次为平面小间隙密封结构、角式大间隙密封结构,而平面大间隙密封结构的抗磨损性能最差;定义了磨损函数,且密封面上磨损函数值的分布与试验结果吻合较好.研究结果可为渣浆泵的抗磨损设计提供一定的理论依据.

In order to study the influence of seal structure of the front chamber of slurry pump on the wear characteristics of sealing surface,the ESH type cyclone feed pump was used as the research object and four common front chamber sealing structures were selected.Under the premise of the same working conditions and the same hydraulic parameters of impeller and volute,the computational fluid dynamics software ANSYS CFX and wear model were used to simulate the solid-liquid two-phase flow in the pump,which was verified by experiments.The results show that the angular small-gap sealing structure has the lowest concentration of solid phase on the sealing surface,the velocity distribution of solid phase is the most uniform,the weight loss of the sealing surface is smallest,and the wear resis-tance is the best.The second is the plane small clearance seal structure and the angle type large clea-rance seal structure,while the wear resistance of the plane large clearance seal structure is the worst.Furthermore,the wear function is defined,and the distribution of the wear function values on the sea-ling surface is in good agreement with the experimental results.The research results can provide a theoretical basis for the wear resistance design of slurry pump.