转动惯量在线测量用涡卷弹簧的设计

针对正弦扭矩标准装置气浮轴系的转动惯量在线测量需求,根据机械标准设计一非接触平面涡卷弹簧,用于测量正弦扭矩标准装置气浮轴系转动惯量。因该涡簧圈数较少(小于设计标准中建议的三圈以上),因此通过有限元分析软件ANSYS分析该涡簧的特性曲线,仿真结果表明:该涡簧能够稳定提供足够的反作用力矩驱动气浮轴系作扭摆运动。实际测试结果表明:使用该涡簧测量转动惯量时,测量结果一致性良好,测量结果精度较高,能够满足测量需求。

The Design and Research of the Spiral Spring Used for Rotational Inertia Measurement

Aiming at the rotational inertia on-line measurement of the air-floating shaft system in the sine torque standard device, a non-contact flat spiral spring is designed according to the mechanical standard .Because the number of turns of the spring is less than the recommended turns in the design standard, the finite element analysis software ANSYS is applied to analyze the characteristic curve of the spring to verify whether the spring can stably provide sufficient reaction torque to drive the air shaft twisting. Experiments show that the results have good consistency and high accuracy by using the spring to measure the rotational inertia, which can meet the measurement requirements.