锌液倒角对垂直电磁封流过程中电磁力的影响

Effect of Liquid Zinc Chamfer on Electromagnetic Force in Vertical Electromagnetic Sealing Process

以往研究垂直热镀锌技术时,将锌液区域视为理想的矩形,而实际锌液边界是曲线.为更准确了解锌液受力的规律,本项目将锌液区域假设为带倒角的矩形区域,分别研究了锌液无量纲间距为7.375~7.625,励磁电流频率为3~7 Hz,倒角的无量纲距离为0~25、0.5和0~75时锌液的受力情况.实验结果表明:在考虑边界倒角情况下,锌液受到的电磁力随倒角增大而减小,锌液电磁力峰值随着频率增大而逐渐减小,提高励磁频率可以使锌液在一个周期内受力更平稳.锌液的倒角越大,锌液一个周期内所受电磁力最大幅值和最小幅值的差值越大.

In studies of the technology of vertical hot galvanizing, it was reported that the liquid zinc area is ideal rectangular, however the actual shape of zinc liquid boundary is curved. In order to understand clearly the force distribution in zinc liquid,it is assumed in this paper that liquid zinc area is the rectangular region with chamfer. The experimental was carried out when liquid zinc dimensionless vertical height was 7. 375 -7.625,exciting current frequency was 3-7 Hz, dimensionless chamfer distance was 0.25, 0.5 and 0.75. The results showed that the electromagnetic force of zinc liquid decreases with increasing chamfer distance. Peak electromagnetic force of zinc liquid decreases with frequency increasing. Electromagnetic force becomes smoothly with the frequency increasing. The greater the chamfer of liquid zinc,the bigger the difference of the peak electromagnetic force and valley electromagnetic force.