油浆泵机械密封热流固耦合特性研究

Study on Thermal Fluid-Solid Coupling Characteristics of Mechanical Seal of Slurry Pump

油浆泵的介质为高温油浆且含有催化剂颗粒,运行工况恶劣,机械寿命普遍不高,并且经常发生泄漏。针对油浆泵机械密封失效问题,通过Solidworks建立由泵盖、密封腔、密封组件、泵轴以及冲刷流体组成的一个三维模型,利用Fluent软件采用热流固耦合的方法研究了温度场、压力场和速度场,结果表明都是从靠近泵送高温介质的一侧到另外一侧逐渐降低。分析了不同的机械密封面宽度、材料、转速对机械密封端面温度的影响。

The medium of oil slurry pump is high temperature oil slurry and contains catalyst particles.So the operating conditions are harsh,and the life of mechanical seals is generally not high and leakage often occurs.Aiming at the failure of the mechanical seal of the slurry pump,a three-dimensional model consisting of the pump cover,the seal cavity,the seal assembly,the pump shaft and the flushing fluid was established by Solidworks.The temperature field,pressure field and velocity field were studied by thermal fluid-solid coupling method based on Fluent software.The results showed that they gradually decreased from the side near the pumping high-temperature medium to the other side.The effect of different mechanical seal surface widths,materials,and rotational speeds on the mechanical seal end face temperature was analyzed.