金属波纹管高温振动试验系统研制

为解决金属波纹管的高温振动特性测试难题,研制了一套低成本、温度连续可调的金属波纹管高温振动试验系统;该试验系统以弧形石英灯阵为辐射加热装置并采用LabVIEW对波纹管进行精确温度控制,通过电磁激振器对金属波纹管施加轴向和径向的外部激励,由动态加速度传感器获取振动响应信号,经数据采集器进行实时采集存储,获得波纹管振动响应;以DN108不锈钢波纹管为试验样件,测试其在不同温度的频响曲线,试验证明,该系统可稳定、可靠地获取波纹管高温振动特性.

Development of High Temperature Vibration Test System for Metal Bellows

In order to solve the technical problem of high temperature vibration characteristics testing of metal bellows, a low-cost and continuously adjustable temperature test system for metal bellows was developed. The test system uses the arc-shaped quartz lamp array as the radiation heating device and uses LabVIEW to accurately control the temperature of bellows. Axial and radial external excitation is applied to the metal bellows through an electromagnetic exciter, the vibration response signal is obtained by the dynamic acceleration sensor, and the data collector is used for real-time collection and storage to obtain the bellows vibration response. Taking the DN108 stainless steel bellows as the test sample to test its frequency response curve at different temperatures. The test proves that the system can obtain the high temperature vibration characteristics of the bellows stably and reliably.