摘要
分析了径向载荷、倾覆力矩及轴承径向间隙等参数对滚针轴承力学特性的影响。首先,利用Hertz理论及力法解静不定问题,推导出滚针轴承径向载荷与变形的计算关联式;然后,依据力矩平衡原理,得出轴承外圈倾斜对轴承有效长度上载荷分布的影响;最后,以某一双涡圈涡旋压缩机用滚针轴承为研究对象,研究其径向变形量及载荷分布规律。结果表明,虽然滚针的径向承载与径向总变形之间的关系为非线性关系,但在涡旋压缩机应用中滚针最大径向变形量与轴承总径向力近似成正比,且随曲轴转角同规律周期性变化,相对径向载荷、倾覆力矩对滚针轴承的失效起绝对作用。研究结果对涡旋压缩机的结构设计、驱动轴承的选用及周期性检修、压缩机轴-轴承的动力学行为及动力学与摩擦学的耦合问题研究提供一定的理论依据。
The effects of the radial loads, overturning moment and bearing radial clearance parameters were analyzed which on the needle roller bearing dynamics characteristic. Through applying Hertz theory and force method to solve static indeterminacy problems, calculations of the radial loads of needle roller bearing and deformation were deduced. According to the principle of the moment balance, the inclined bearing′s outer influence on the loads distribution of bearing effective length was concluded. With twinwraps scroll compressor with needle roller bearing as the research object, the variations of the radial deformation and load distribution were studied. The results show that the needle roller loads and radial total deformation is nonlinear, but the biggest radial deformation and total radial force is approximation proportional when it applied in scroll compressor, with the crankshaft angle periodic variation. Relative radial loads, overturning moment play absolute role on the needle roller bearing failure. It is suggested that the results can provide some theoretical basis for scroll compressor structure design, drive bearing selection and periodic maintenance, crankshaft-bearing dynamic behavior, dynamics and tribology coupling problem study.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2013年第S1期18-22,215,共6页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金资助项目(50975132)
关键词
涡旋压缩机
滚针轴承
倾覆力矩
间隙
scroll compressor,needle roller bearings,overturning moment,clearance
