多功能滑动轴承试验台测控系统设计

Design of Measurement and Control System for Multi-functional Journal Bearing Test Bed

为了研究不同机械行为下轴—滑动轴承系统中滑动轴承的润滑性能,研制了多功能滑动轴承试验台的测控系统。该系统由测控仪和工控机组成,可以测量润滑油膜瞬时压力、油膜厚度以及温度分布状况,确定轴心位置、轴颈倾斜角等性能参数。测控仪对试验台主轴转速进行闭环控制,按主轴转角对传感器信号进行采样,并以网络通讯方式进行数据传输。后台管理系统以图表形式显示采样数据,计算并绘制参数曲线。测试结果表明,该系统完全能够满足高速、高精度数据采集和滑动轴承试验的要求。

In order to study the lubrication performance of the journal bearing in a shaft-sliding bearing system under different mechanical behaviors, a measurement and control system for multi-functional journal bearing test bed was developed. The system was made up of a measurement and control instrument and an industrial control computer. The lubricant film pressure, film thickness and temperature profile of journal bearing could be measured, and the lubrication characteristics parameters such as axis center location, journal misalignment angle could be determined. Speed of main spindle of the test bed was controlled by the measurement and control instrument in closed-loop, and sensor signals were sampled based on the shaft angle and uploaded to industrial control computer by means of network communication. The sampled data were showed in graph form on background management system, and parametric curves were calculated and plotted. The testing results show that the performance of system can fully satisfy both the requirements of high speed and high precision data acquisition and the journal bearing test.