Design and analysis of damping bearing with elastic waved ring
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摘要:
设计了一种圆周周向呈现正弦波纹状的弹性圆环轴承阻尼器，与滚动轴承耦合到一起，实现轴承减振吸能功能。建立了弹性波纹环减振轴承的力学模型，利用有限元方法对该减振轴承进行力学性能分析，研究了弹性波纹环几何参数对其应力分布和径向压缩刚度的影响以及弹性波纹环的减振吸能效果。结果表明：与弹性凸台环比较，弹性波纹环的应力分布有了很大改善，在给定工况下，最大Mises应力从1 356 MPa降低到464 MPa，应力减小了64%，消除了应力集中现象；弹性波纹环的厚度、波纹周期数和弹性环直径对弹性环的应力和刚度影响显著。弹性波纹环的引入大幅度降低了轴承在振动冲击时受到的冲击力。
Abstract:An elastic ring bearing damper with sinusoidal corrugated shape was designed, and also coupled with rolling bearing to realize the function of vibration absorption and energy absorption. The mechanical model of elastic waved ring damping bearing was established, and damping bearing was analyzed by finite element method. Influences of geometric parameters of elastic waved ring on the stress distribution, radial compression stiffness, vibration reduction, and energy absorption were studied. Results indicated that stress distribution of elastic waved ring was greatly improved compared with the stepped elastic convex ring. In a given working condition, the maximum Mises stress was decreased by 64% from 1 356 MPa to 464 MP as stress concentration phenomenon was eliminated. Thickness of elastic ring, wave period and diameter of elastic ring all had significant influences on the stress and stiffness. Elastic waved ring also greatly reduced the impact force of the bearing under vibration impact.
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图 6 a=0.1 mm、 n=8、t=2 mm、D=47 mm时弹性环应力和刚度随位移变化曲线
Figure 6. Curve of stress and stiffness of elastic ring with displacement when a=0.1 mm, n=8, t=2 mm, D=47 mm
图 7 e=0.05 mm恒定位移时各几何参数对弹性环应力和刚度的影响
Figure 7. Influence of geometric parameters on stress and stiffness of elastic ring at e=0.05 mm constant displacement
图 8 a=0.1 mm、 t=1 mm、 n=8尺寸下e=0.05mm恒定位移时弹性环内径D对应力和刚度的影响
Figure 8. Influence of inner diameter D of elastic ring on stress and stiffness at e=0.05 mm constant displacement when a=0.1 mm, t=1 mm, n=8
图 9 F=8 000 N恒定力载荷时各几何参数对弹性环应力和位移的影响
Figure 9. Influence of geometric parameters on stress and displacement of elastic ring at constant force load F=8 000 N
表 1 减振轴承几何参数
Table 1. Damping bearing geometric parameters
几何参数 数值 弹性环内径D/mm 47 轴承外圈外径Dw/mm 47 轴承外圈内径Dn/mm 39.9 波纹幅值a/mm 0.1 波纹周期数n 8 弹性环厚度t/mm 2.0 减振轴承宽度B/mm 12 附加外套厚度L/mm 3 
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表 2 材料参数
Table 2. Material parameter
参数 60Si2Mn弹簧钢 GCr15轴承钢 弹性模量/GPa 206 208 泊松比 0.3 0.3 密度/（$ \mathrm{k}\mathrm{g}/{\mathrm{m}}^{3} $） 7850 7800 屈服极限/MPa 1497 518
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