平面感应电磁泵泵沟内感应磁场研究

A research on induced magnetic field located in the pump ditch of the plane induction electromagnetic pump

驱动液态金属用平面感应电磁泵,电磁驱动力主要由泵沟内部感应磁场与液态金属中形成的感应电场共同作用产生,而感应电场由感应磁场激发产生.研究电磁泵泵沟处感应磁场的分布情况及变化规律,有利于电磁泵的优化设计及其性能的提高.利用有限元软件ANSYS进行平面感应电磁泵仿真研究,得知电磁泵泵沟处感应磁场在三维空间均有分布,但以沿X轴变化为主.电磁泵泵沟内通入液态金属Zn或Sn后,感应磁场强度相比液态金属未通入前的值要小.参考模拟模型及计算结果,设计并制造实体平面感应电磁泵,在相同加载条件下,位于电磁泵泵沟处的感应磁场强度的实际测量值与模拟计算值存在允许误差,最大为8.3%,验证了模拟计算的准确性.依据计算数据,在75~85 V电压调节范围内改变电磁泵加载电压,可实现电磁泵对液态金属Sn的变流量泵送.Sn液泵送流量较大且流速比较稳定时加载的电压值为80 V,对应泵沟处感应磁场强度均值为0.137 T.

The plane induction electromagnetic pump for driving liquid metal and the electromagnetic force is generated by the common effect of the induced magnetic field while the induced electric field is motivated by the induced magnetic field in liquid metal contained in the pump ditch. It is beneficial for the distribution and variation of the induced magnetic field in the pump ditch to be researched for the purpose of the optimal design and performance improvement of the electromagnetic pump. The simulation study of the plane induction electromagnetic pump was conducted by using finite element analysis software ANSYS and it was concluded that the induced magnetic field was distributed in three-dimensional space,but the priority was given to the change along the X axis. A smaller value of the induced magnetic field intensity was presented compared to the situation in which the zinc or tin liquid was not imported in the pump ditch. Based on the simulation model and calculation results,the realistic plane induction electromagnetic pump was manufactured. Under the same situation,the maximum error of the induced magnetic field intensity between the actually-measured value and the simulation value located in the pump ditch is 8. 3%,belonging to permissible experimental error,which verifies the accuracy of the simulative calculation. According to the data obtained from simulative calculation,the liquid metal tin can be pumped by the plane induction electromagnetic pump at variable flow rate when the regulating range of the on-load voltage changes from 75 to 85 V. Liquid metal tin can be pumped in a biggish flow and at a stable flow rate under the condition of 80 volt of the on-load voltage and 0. 137 T of the corresponding mean value of the induced magnetic field intensity in the pump ditch.