Wear performance of geometric parameters of V-shape pocket of cylindrical roller bearing
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摘要:
为研究高速轻载工况下兜孔形面几何参数对V形兜孔圆柱滚子轴承保持架磨损性能的影响，建立了考虑兜孔处润滑影响的轴承动力学模型。以基于Masjedi磨损模型的时间平均磨损率作为磨损性能的评价标准，研究了兜孔形面几何参数对V形兜孔保持架磨损性能的影响规律，分析了在不同转速下兜孔壁倾角均为15°的V形兜孔保持架的磨损性能及打滑特性。结果表明：兜孔形面几何参数对保持架的磨损性能影响显著，通过对其优化可有效提升保持架的磨损性能；保持架的时间平均磨损率随内圈转速的增加而上升；在内圈转速的范围为5000～20000 r/min时，兜孔壁倾角均为15°的V形兜孔保持架的时间平均磨损率和打滑率均低于普通直兜孔轴承。
Abstract:To study the influence of geometrical parameters of pocket on the wear performance of V-shaped pocket cage of cylindrical roller bearing under high rotational speed and light load conditions, a bearing dynamic model considering the influence of lubrication at pocket was established. Based on the time-averaged wear rate of Masjedi wear model, the influence of geometric parameters of pocket on the wear performance of V-shaped pocket cage was studied. In addition, the wear and slip performances of V-shaped pocket cage with 15° inclination angle at different rotational speeds were analyzed. The results showed that the geometrical parameters of the pocket had remarkable effect on the wear performance of the cage, and the wear performance of the cage can be effectively raised by optimizing the geometrical parameters of the pocket. The time-averaged wear rate of cage increased with the inner ring rotational speed. When the inner ring rotational speed ranged from 5000 r/min to 20000 r/min, the time-averaged wear rate and slip rate of V-shaped pocket cage with 15° inclination angle were lower than those of ordinary straight pocket bearings.
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Key words:
- cylindrical roller bearing /
- cage /
- V-shape pocket /
- dynamics model /
- wear performance
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图 3 滚子与兜孔的接触刚度、阻尼及其接触区
Figure 3. Contact stiffness，damping and area of roller and pocket
图 4 滚子与兜孔的等效接触刚度和阻尼
Figure 4. Equivalent contact stiffness and damping of the roller and pocket
图 5 保持架打滑率在不同内圈转速下的变化曲线（径向载荷为2100 N）
Figure 5. Variation curves of cage slip rate under different inner ring rotational speeds （radial load is 2100 N ）
图 6 保持架打滑率在不同径向载荷下的变化曲线（内圈转速为7000 r/min）
Figure 6. Variation curves of cage slip rate under different radial loads （inner ring rotational speed is 7000 r/min）
图 7 各个壁倾角取不同值时的时间平均磨损率
Figure 7. Time-averaged wear rate with variousinclination angles
图 8 周向上两个壁倾角取不同值时的时间平均磨损率
Figure 8. Time-averaged wear rate of the two various inclination angles in circumferential direction
图 10 保持架打滑率在不同内圈转速下的变化曲线
Figure 10. Variation curves of cage slip rate under various inner ring rotational speeds
表 1 轴承结构参数
Table 1. Geometric parameters of bearing
参数 数值 轴承内径/mm 100 轴承外径/mm 140 轴承宽度/mm 20 滚子数量 26 滚子直径/mm 10 滚子宽度/mm 7 保持架内径/mm 114.46 保持架外径/mm 124.46 
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表 2 轴承材料特性参数
Table 2. Material performance parameters of bearing
元件 密度/
10−6 （kg/mm3）弹性模量/
105 （N/mm2）泊松比 内圈 7.801 2.07 0.290 外圈 7.801 2.07 0.290 滚子 7.801 2.07 0.290 保持架 8.545 1.06 0.324
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表 3 4050航空润滑油参数
Table 3. Parameters of 4050 aviation lubricating oil
参数 数值 常温密度/10−6 （kg/mm3） 0.970 动力黏度/（Pa·s） 0.055 导热系数/（N/（m·K）） 0.0966 黏压系数/10−8 Pa−1 2.02
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