提出了一种轴系与弹簧隔振基础联合振动试验台的设计思路,以某百万千瓦级核电半速机组为原型,根据几何尺寸比拟及动力特性相似原则,成功搭建了原型机组尺寸1/10的试验台,为考察试验台设计合理性进行了初步调试.结果表明:试验台轴系转速可达10 000 r/min以上,运转过程中轴振、瓦振、润滑油温度和压力等参数均正常可控,其变化趋势符合设计预期,且系统各部件在调试检查中均未出现异常,基本满足设计安全性要求;瓦振峰值转速与轴振峰值转速存在一定差异,且部分瓦振峰值转速与弹簧隔振基础顶板模态测试频率一致,说明弹簧隔振基础对轴系振动特性的影响不容忽视;初步调试结果为保障试验台后续试验研究的安全可靠运行奠定了基础.%A design idea of combined vibration test rig for shafting and spring vibration-isolated foundation was proposed.Taking a 1 000 MW nuclear power half-speed unit as the prototype,a test rig was set up in the proportion of 1:10 based on the principles of geometric and dynamic similarity,to which,initial commissioning was carried out to verify the rationality of the design.Results show that the running speed of the test rig can reach 10 000 r/min,and the system components and monitoring parameters are all normal and controllable in the commissioning,such as the shaft vibration,bearing vibration,oil pressure and oil temperature,etc.,which basically meet the safety requirements in design.There exists certain difference between peak speeds of bearing vibration and shaft vibration,and some bearing vibration peak speeds keep consistent with the modal frequencies of foundation roof,showing the effect of spring vibration-isolated foundation on the shaft vibration characteristics.The commissioning has laid a foundation for the safety and reliable operation of the test rig in the following researches and experiments.
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