转子-轴承系统扭转振动在线监测方法研究

A Study on the On-Line Monitoring Methods of the Torsional Vibration of Rotor-Bearing System

由于受机械结构设计局限、材料组织不均匀、制造与装配工艺误差、载荷变化与冲击因素影响,转子-轴承系统会被激起扭转振动。周而复始易引发破坏性扭转共振,使损伤处失效。通过研究国内外扭转振动监测方法,结合实践中方法的设计实现,从测扭传感器、测量对象、信号传输三方面提炼进行比较与分析。从而得出磁电式传感器监测是一种较好的在线监测方法,即在主轴端部安装转速传感器进行测量。提出扭转振动监测方法的关键技术,即功能适用性、信号可靠性、环境适应性、可操作性、长期稳定性与经济适用性。某工况条件下,研究转子-轴承系统试验设备扭转振动在线监测的可行性。试验结果能够测出扭转振动角位移,说明该监测方法可行,满足工程测试要求。

Rotor-bearing system is aroused by torsional vibration, due to factors of mechanical structure design limited, uneven material organization, manufacture and assembly process error, shifty load and impact. In cycles, it may easily cause destructively torsional resonance, even disable lesions. After study of torsional vibration monitoring methods at home and abroad, it is compared and analyzed from three aspects of torsion sensor, measuring objects and signal transmission, also combined with practice. It is pointed out that the mxtgnetoelectric sensor monitoring is a kind of better on-line monitoring method,namely installing speed sensors at the end of the spindle for signal measurement. The key technology of monitoring method for torsional vibration is put forward, namely functional adaptation, signal reliability, environmental suitability, maneuverability, long-term stability and economic applicability. It also studies the feasibility analysis of the on-line monitoring for torsional vibration of rotor-bearing test equipment, under the given working condition, A ngnlar displacement of torsional vibration can be measured. The test results show that the monitoring method is feasible, can measure angular displacement of torsional vibration, and meets the engineering test requirements.