基于负荷均衡控制的某压缩机组轴系扭振抑制策略

Torsional Vibration Suppression Strategy Based on Load Balancing Control for a Compressor

摘要:

针对某大型连续式风洞主压缩机组存在扭振点的问题，为保证机组运行安全，以其缩比模型某压缩机组为对象，开展轴系扭振抑制策略研究。针对机组采用双电机对拖的结构形式，采用基于转矩环的负荷均衡控制和基于速度环带转速差补偿的负荷均衡控制两种策略，并通过MATLAB/Simulink进行建模仿真，比对了两种控制策略在扭振抑制方面的效果。在此基础上，在某压缩机组上对两种控制策略开展试验验证，分别采用无线应变扭矩测试方法和齿轮盘-电涡流扭振测试方法对压缩机轴系扭振情况进行测试。仿真和试验结果均表明，基于速度环带转速差补偿的负荷均衡控制策略对轴系扭振具有较好的抑制效果，为某大型连续式风洞主压缩机组轴系扭振抑制提供了重要的技术参考。

Abstract:

In response to the torsional vibration points existing in the main compressor of a large-scale continuous wind tunnel, research on the torsional vibration suppression strategy was conducted using the scaled-down model of a compressor. For the dual-motor driving structure, the two load balancing control strategies of torque loop and speed loop with speed difference compensation were given. The simulation was carried out by MATLAB/Simulink, and the effects of the two control strategies were compared. On this basis, experiments were carried out on a compressor to verify the two control strategies, and the torsional vibration was tested using wireless strain torque testing method and gear disk-eddy current testing method. The simulation and experimental results show that the load balancing control strategy of speed loop with speed difference compensation has a better suppression effect on the torsional vibration, which provides important technical references for the main compressor of a large-scale continuous wind tunnel.