| 摘要:为监测主轴承的磨损情况，对船用二冲程低速柴油主机机座表面的振动信号开展测试与分析。介绍了测试系统的组成和振动测点的布置。通过静态敲击试验，证实了缸内燃气爆发冲击和较远档主轴承的冲击对主轴承处机座表面的振动影响较小。通过对柴油机机座表面振动信号的时域波形分析，证实了对各档主轴承座附近机座表面的冲击振动进行监测，可以了解各档主轴承的磨损状态。研究结果为船用二冲程柴油机的振动监测提供了一个新的方法。 |
| 关键词: 二冲程柴油机 主轴承 振动信号 监测 |
|
| Symptom Analysis of Vibration Signals on the Surface of the Bedplate of a Two Stroke Marine Diesel Engine |
| Hu Yihuai,Elijah Musango,Fang Yunhu |
| Shanghai Maritime University，Shanghai 201306;AVIC Dingheng Shipbuilding Co., Ltd.，Jiangsu Jiangdu 225217 |
| Abstract:The vibration signals on the surface of a marine two-stroke low-speed main engine bedplate were tested and analyzed to monitor the wear conditions of the main bearing. The test system′s constructions and measuring points are introduced. The influence of gas explosion inside combustion chambers and the impact of further main bearing on the vibration of the bedplate surface of main bearing were verified to be small by steady striking experiments. By time domain waveform analysis of the vibration signals on the bedplate surface of the diesel engine, it was proved that monitoring the impact vibration on the surface of diesel engine bedplate near main bearings was usefule to obtain the triblogical condition of main bearings, which provide a new method for the vibration monitoring of two stroke marine diesel engines. |
| Key words: two stroke diesel engine main bearing vibration signal monitoring |
