降低CT运行噪声的旋转轴承固有振动分析研究  

Analysis and research on inherent vibration of the rotational bearing to reduce CT running noise

作　　者：赵宏宇[1] 潘险峰[1] 祝建华[1] 

机构地区：[1]东软飞利浦医疗设备系统有限责任公司,沈阳110179

出　　处：《现代仪器与医疗》2013年第3期83-85,共3页Modern Instruments & Medical Treatment

摘　　要：为满足YY0310、IEC60601-1对CT运行噪声的要求,通过对CT旋转轴承滚动体通过频率的计算,结合应用有限元模态分析方法,对轴承的内、外圈进行模态分析,选定优化的参数:轴承滚动体的数量100个、轴承滚动体直径15mm、轴承节圆直径845mm,解决由于轴承固有振动而产生影响产品质量的噪声问题。实测样机在0.8s/r旋转速度下的最大工作噪声为60dB(A),满足国家标准要求。Based on calculating the balls＇ passing frequency,combine with modal analysis of inner loop and outer loop by FEA,select optimized parameter of CT rotational bearing to meet with the requirement of CT running noise in YY0310 and IEC60601-1.The optimized result is to use 100 rolling balls which diameter is 15mm and the bearing pitch diameter is 845mm.It will solve the noise problem caused by inherent vibration of the bearing which impact on CT product quality.Finally,the testing noise level of the CT prototype is 60 dB（A） under the conditon of 0.8s/r rotational speed and this meet the requirement of relative regulations.

关 键 词：CT旋转轴承 通过频率 模态分析 固有振动 运行噪声 

分 类 号：TP2[自动化与计算机技术—检测技术与自动化装置] TH133[自动化与计算机技术—控制科学与工程]